23 Why Wiser is the smarter option for electricians fitting heating controls
27 How Click Scolmore is revolutionising electrical installations with the launch of its new Elucian Three Phase
45 Discussing the concept of parasitic capacitance in solar PV installations
49 NICEIC’s team of expert, technical engineers answer key questions from the industry
50 The considerations professionals need to make when sourcing appropriate ventilation equipment for the application/environment in question
Fire & Security
34 The team at NAPIT ‘codebreak’ more of the latest reader submissions
36 The key steps to correctly achieving safe isolation
37 The factors to be considered when providing protection against overvoltage in a domestic premises having a service fuse of rating not exceeding 100 A per phase
41 How to ensure you are carrying out Portable Appliance Testing correctly
52 The correct use of CO detectors and where they may be best utilised in fire alarm systems
54 Aico celebrates 35 years of innovative alarms and sensors
56 Could All LED’s latest floodlight range be the answer to your customer’s security lighting needs?
58 Does the need for reliable alarm signalling and monitoring create a fantastic opportunity for proactive professionals?
60 Why Siemens’ fire detection system has been chosen to protect one of London’s most iconic venues
62 How the use of IDEAL Electrical equipment has helped provide the perfect security upgrade for the NHS Trust
64 What are the benefits of getting to grips with the latest in fire clip technology?
66 Why should you consider adding smart security and detection to your solutions setup?
69 The key criteria installers need to be aware of to ensure installed audio systems are fire safe
Products & Business Solutions
73 Can smarter messaging boost smart EV charging?
75 Charting the evolution of the clamp meter
78 Do you understand the need for Temporary Works training in the electrical industry?
80 How electricians can grow their business by educating customers on the benefits of domestic EV charger installations
82 Taking a closer look at the next generation of testing solutions which are powering solar PV installations
84 Which products have been specified, and where?
88 Rounding up the newest products, tools and equipment to help you with your work
Subscriptions to PROFESSIONAL ELECTRICIAN are available Please contact us for rates
Editor ’s Viewpoint
Skills are key to sur vival
It’s said that getting married and starting your own business are two of the biggest decisions you’ll ever make in your life, and you can see where the similarities might lie.
Both require a deep commitment, shared vision and hard work, not to mention the fact they’re likely to cost you a pretty penny without any immediate return on the investment! (Ed’s note: the tin hat will be firmly on this month in preparation for the responses to that one)
But, should you make a success of it and show the dedication required, the longer term rewards can be priceless
Although we’re by no means operating in the easiest climate for new businesses to form and prosper, particularly with successive governments hell bent on extracting every penny from the pockets of SMEs, research shows that new starter electrical businesses have a far greater shelf-life than the majority of their trade counterparts.
The study, compiled by Start Up A-Z, looked into the trades with the best survival rates (since 2021), along with other trends such as the highest day rates each is commanding In both cases, electricians rank among the top spots.
Interestingly, on average, just 50% of startups last more than three years, with those formative years proving crucial to the overall longevity of a business
Electricians have successfully bucked this particular trend, with over 52% of businesses that were formed in 2021 still in operation today Unsurprisingly, plumbing companies took the top spot in this particular category, with 58% of firms going strong
Slightly more surprising is the fact that, despite never being able to get hold of one when you need them, plumbers rank third in terms of overall average day rates
Electricians (rightly so) command £400 on average per day – around £50 more than their plumbing colleagues – with car mechanics leading from the front at £480
Although electrical and plumbing businesses seem to be coping well postpandemic, a quick glance at the survival rates of other specialist trade firms should still create cause for concern
Since 2021 DIY activities have seen a huge surge across the UK, with building equipment sales increasing by 31.4% and paint by 47 1%, over the period since
With this in mind, it’s likely that new skills learnt during the pandemic have encouraged Brits to carry out home improvements themselves, rather than paying for an expert to help
In fact, a report from American Express revealed that 50% of DIYers said they were confident with their DIY skills following the growth of tutorial videos on social media
This surge in DIY home improvements may have a part to play in the least successful trade businesses, with 61% of painter and decorator companies formed in 2021 having since dissolved, along with 49% of plasterer companies.
Other factors that continue to affect all industries, such as rising material costs due to inflation and supply chain issues, means many businesses are finding it tough to keep their heads above water
Fortunately for the electrical sector, the skills of its operatives and the safetycritical work they undertake, will ensure that ‘Joe Public’ can’t just decide to fire up a tutorial video and take the task, and your livelihood, into their own hands
Although the standards and legislation that govern the electrical industry can seem never-ending, and the investment individuals need to make in ensuring their knowledge and skills are up to speed is significant, the specialist skill-set acquired ensures that the trade won’t be put out to pasture by ‘DIY Dave’ any time soon.
Enjoy the issue and have a good month,
Richard B o wler
ECA's digital series to electrify road to net-zero
The Electrical Contractors’ Association (ECA) has launched Electrifying Our Future, a digital series that explores the critical role of the electrical industry in delivering the UK’s net-zero ambitions.
With the UK government committed to clean power by 2030, the pace of electrification is accelerating, but without the right skills, infrastructure, and policy clarity, progress risks being derailed
Electrification is not just about renewable energy and infrastructure investment – it requires a highly skilled workforce and robust safety standards to succeed. As the UK moves towards heat pumps, EVs, and smart energy systems, the need for proper training, clear regulation, and industry-wide collaboration has never been greater
Electrifying Our Future spotlights the key barriers to electrification – from skills shortages to supply chain issues – and outlines the solutions needed to ensure a safe, rapid transition to net zero
The series highlights the essential steps needed to scale up efforts in the sector, from addressing the skills gap and improving workforce training to adopting emerging technologies and optimising existing low-carbon systems
By spotlighting the key players, policies, and innovations driving this change, Electrifying Our Future provides a roadmap for navigating the challenges ahead and seizing the opportunities of tomorrow’s energy landscape
The series will feature valuable insights and contributions from a wide range of
leading organisations in the sector, including Megger, PowerCor, JTL, Sync Energy, SES Engineering Services, Simpro Software, Hispec, NIBE, Chameleon Technology, ABB Electrification Service, and EnergyAce
These firms demonstrate a shared commitment to advancing the electrical contracting industry’s role in the UK’s decarbonisation efforts, and are helping shape the future of a more sustainable, electrified economy
Electrifying Our Future also features contributions from leading figures in the electrical and energy sectors.
YOU CAN WATCH THE ELECTRIFYING OUR FUTURE SERIES AT: WWW.RDR.LINK/EBM001
AFDD Technical Bulletin released by BEAMA
BEAMA has published a Technical Bulletin giving clarification and guidance on AFDD's performance with XLPE cables
The report is the result of some false statements that are being made in relation to arc fault detection devices (AFDDs) and cross-linked polyethylene insulated (XLPE) cable i.e., mainly:
● AFDDs require carbon (produced by the charring of ) PVC/PVC cable to detect arc faults and don’t work when used with XLPE cable ● XLPE cable doesn’t char under any arc fault conditions therefore, AFDDs can be omitted
The terms ‘char’ and ‘carbon’ both relate to forms of carbon produced by materials under heat, but they differ in their composition and context
The objective of the bulletin is to provide independent test evidence that demonstrates these two statements to be incorrect It aims to clarify, through independent testing, that the use of XLPE cables and similar are suitable for use with AFDDs
Full details of the independent tests and related testing house are within the document
LEDVANCE has announced the opening of a new warehouse and distribution centre just outside of Birmingham, UK.
The centrally located warehouse will provide customers across the UK with swift access to LEDVANCE’s extensive line of intelligent and efficient lighting solutions for commercial, industrial and residential applications. The vast range of lighting products being stocked at the new warehouse includes LED lamps and luminaires, LED strip lighting, smart lighting, and light management systems
LEDVANCE UK Managing Director, Nelo Neves, said: “Until now, our stock was housed and distributed solely from our central warehouse and distribution facility in Molsheim, France, with a lighting portfolio that caters to the whole of Europe
“However, the increasing awareness of sustainability and energy-saving technologies has driven the decision for us to establish a local warehouse to help meet customer demand more efficiently and cost-effectively by importing our UK-specific lighting solutions directly to the UK ”
Lee Hickling, Logistics and Warehouse Manager at LEDVANCE, added: “We wanted a UK-based warehouse to streamline our logistics and reduce lead times for deliveries to our wholesale customers across the UK Any improvement in service levels greatly increases customer satisfaction
“Another plus is that our UK warehouse reduces shipping costs and lowers import tariffs, which lead to significant savings It also gives us full control of our local stock. All these benefits ultimately accrue to our valued customers in the UK.”
The film highlights the professionals behind every connection – those who bring power, safety, and reliability to homes, businesses, and communities
At the centre of the story is Cornish electrician, Isaac Penfold, whose journey reflects the passion, pride, and responsibility that define his profession Through his experiences, the film explores the connection between his work and his family, illustrating the personal and professional dedication that drives electricians every day.
WISKA UK shares these values, designing and manufacturing products with electricians in mind. With a focus on reliability, innovation, and ease of use, the company aims to support electricians, designers, and engineers in their work. Behind Every Connection serves as both a tribute to their dedication and a reaffirmation of WISKA’s commitment to working alongside them
New and improved NAPIT
EXPO unveiled for ELEX 2025
N A P I T h a s a n n o u n c e d a n e w a n d
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d e s i g n e d t o d e l i v e r a n e n h a n c e d ,
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p r o f e s s i o n a l s .
W i t h a f o c u s o n e d u c a t i o n ,
h a n d s - o n l e a r n i n g a n d n e t w o r k i n g ,
t h i s y e a r ’s E X P O w i l l f e a t u r e a f r e s h ,
d y n a m i c s t a n d , e x p e r t - l e d C P D
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p r o f e s s i o n a l s , t h e N A P I T E X P O a t E L E X 2 0 2
NAPIT Commercial and Compliance Director, Steve Melton,
says: “We’re excited to bring a fresh, interactive experience to ELEX 2025 with our new stand and CPD sessions
eBook introduction will improve mould and damp awareness
Vent-Axia has published a free eBook ‘Ensuring Safe Housing Conditions: Focusing on Mould and Damp Conditions’.
Aimed at social housing landlords the publication gives guidance on Awaab’s Law to help landlords navigate the changes, tackle damp and mould, and create healthier homes for residents.
Initiated following the tragic death of two-year-old Awaab Ishak, due to a mouldy home, this crucial legislation will ensure social housing landlords investigate and resolve damp and mould issues within strict timeframes, helping to protect residents and prevent future tragedies.
With the UK government recently setting October 2025 as the date for Awaab’s Law to take effect in the social housing sector, landlords need to prepare
Written by Vent-Axia’s social housing experts the eBook is designed to help landlords and maintenance professionals in their preparation for Awaab’s Law
Offering valuable guidance ahead of the implementation, the eBook clearly explains what Awaab’s Law is; why it matters; and how to comply
Providing a wealth of information, the document also outlines tenants’ rights and protection; other legal standards; and provides links to additional resources.
Earn 5 x CPD credits
Professional Electrician & Installer has launched the fourth edition of its ‘CPD Book’ online-only publication, which offers industry professionals the opportunity to earn 5 x CPD credits, or the equivalent of five hours’ learning/reading time.
Accredited by The CPD Group, ‘The CPD Zone’ has proved a big hit since launch with hundreds of readers downloading a bespoke, personalised
Crucially, the eBook covers practical advice and insights on the health risks of damp and mould, and how to take proactive measures to prevent and tackle it
In addition, there is a useful ventilation checklist; and details of the different types of ventilation available with guidance on choosing the right solution for a property
with PE’s latest CPD Book
certificate of proof in every issue
This book wraps up the content from
the last five ‘CPD Zone’ sections of 2024 to offer professionals a FREE, valuable 88-page resource
The CPD Book: Volume Two 2024 is free to access and is available now on the PE website You can also request a download link while you’re there.
ACCESS THE CPD BOOK: VOLUME TWO 2024 AT: WWW.RDR.LINK/EBM007
The power of three as lighting Group launches
A new chapter has commenced in the lighting and inventory management industries with the launch of Inovara Group, bringing together three established brands – Collingwood Lighting, Nobile Italia, and Indigo Lighting – under one powerful identity.
With offices in the UK, Italy, and Belgium, Inovara Group services customers in 28 countries, providing high-quality lighting solutions tailored to professional and commercial markets
The Group’s establishment will create a unified identity across all markets, making it easier for customers and
partners to engage with each brand
Each product brand will be the recipient of a refreshed visual identity, ensuring consistency and clarity
Guy Williams, CEO of Inovara Group, said: “This launch represents a significant milestone for our business By bringing together Collingwood Lighting, Nobile Italia, and Indigo Lighting under the Inovara Group, we are strengthening our ability to serve our customers with greater innovation, efficiency, and collaboration
“Our commitment to quality and service remains steadfast, and we look
forward to shaping the future of lighting together "
GET MORE DETAILS ON INOVARA GROUP BY VISITING:
BG Circuit Protection has undergone a comprehensive evolution, with updates designed in direct response to contractor feedback. Here we learn more.
FLEXIBILE INSTALLATION AND SUPERIOR PROTECTION? ARE YOU READY FOR
This newly improved range reflects BG’s ongoing commitment to innovation, safety and customer satisfaction, ensuring compliance with the latest 18th Edition Amendment 3 wiring regulations while addressing real-world installation challenges
The latest enhancements streamline installation, improve functionality, and
“This update is all about making installation easier, neater and more efficient for contractors. We’ve listened to the feedback and introduced features that truly make a difference. Whether you're fitting a standard unit or preparing for future expansions, BG Circuit Protection offers a complete solution.”
provide a cleaner, more organised setup
Whether for new builds, retrofit projects, or future-proofing for renewable energy integrations, the new BG Circuit Protection range delivers flexibility and reliability that professionals can trust.
Key upgrades for ease of installation
Optimised cable entry points
Two rows of enlarged oval knockouts at the rear, plus 20/25/32/40 mm round knockouts on all sides, allow for maximum adaptability of incomer cables.
More space and greater efficiency
The single-module Type 2 SPD removes the need for extra MCB protection, freeing up an additional circuit way
Enhanced device engagement
The raised, removable DIN rail design ensures stronger and more secure device attachment, reducing movement and improving durability
Neater installations
Featuring a new segmented rear clip-in
cable protector, improved grommet strip, and an optional cable clamp for a neat and professional finish
Comprehensive accessories and labelling
An updated label sheet with a broader selection of identifiers, plus new accessories like MCB-style blanks and magnetic one-size-fits-all stand-off brackets, provide greater customisation and neater installations
Easier access and handling
A reinforced elongated lid visor lifting section enhances strength and makes access to internal components more convenient
Introducing 36 way and 48 way dual row boards
To further support the needs of electricians working on large-scale and complex projects, BG has expanded its range with the introduction of 36 way and 48 way dual row distribution boards. These additions provide even greater
flexibility for installations that require increased circuit capacity, making them ideal for commercial applications, multi-unit residential projects, and installations with extensive electrical demands
The expanded range ensures contractors have the solutions they need for modern electrical setups, whether they’re working on high-density residential projects, commercial environments, or industrial applications where large-scale circuit protection is required
Built for solar success
With the increasing demand for solar energy systems and EV charging integration, BG Circuit Protection is built for the future The latest range includes bidirectional 18th Edition Amendment 3 compliant devices, making them suitable for use in PV and EV applications
These devices ensure seamless integration with renewable energy systems, allowing energy to flow both to and from the grid, supporting solar battery storage solutions and vehicle-to-grid technology.
With the ongoing shift towards sustainability and low-carbon solutions, these enhancements position BG Circuit Protection as a leading choice for installers working on solar and EV-ready installations
Bespoke build service for complex projects
While BG already offers an extensive range of both populated and unpopulated boards, along with a wide variety of devices, the brand recognises that some projects require a more customised approach. To meet the needs of specifiers and contractors handling particularly complex installations, BG provides a bespoke build service
This tailored solution allows electricians to order custom-configured boards, ensuring they receive a system that perfectly meets their specific project requirements Whether working on high-end residential properties, large commercial buildings, or specialist industrial installations, BG’s bespoke service ensures the right protection solution is available for every job.
designed to grow with evolving electrical needs Readily available accessories and expansion options ensure seamless upgrades and modifications, helping contractors stay ahead of changing industry requirements
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TOOL THIEVES 0 TRADES UNITED1
The Trades United Van Rally drove the issue of tool theft to the heart of government to demand change. PE reports from a mass-protest of construction professionals.
“In the last 15 years I’ve had close to £110,000 worth of tools and equipment stolen,” laments Edward Windsor of Urban Design & Build “We’ve had our vans broken into six times, building sites we were working on robbed on three separate occasions, and we’ve lost a whole vehicle ”
This is just one of many all-too familiar tales of vulnerable tradespeople falling victim to unscrupulous thieves, but Edward was sharing his experiences on a
day when electricians, plumbers and builders came together to take a stand.
The participants of the Trades United Van Rally converged on Brent Cross before hundreds of vehicles descended in convoy on Parliament Square Their aim was to make a very vocal and visible statement to our legislators and the message was quite simple – enough is enough
“It's the same perpetrators time and again and nothing is being done,” declares Shoaib Awan, the organiser of
“If you do claim on the insurance after you’ve been targeted then you’ll find your premiums will go up.”
Edward Windsor
the demonstration.
Like all of his follow protestors he is indignant, frustrated, and yet determined to expose how cruel a crime tool theft really is Shoaib is calling for tougher sentencing for a class of offence that is ruining livelihoods and businesses, together with greater regulation of markets and car boots sales It is here that the ill-gotten gains of the offenders are invariably sold on, and Shoaib believes that they should be subject to substantial fines if stolen goods
“The second time it happened to me I didn’t even bother to report it because I knew nothing would come of it.”
Thomas Picard
“I’m newly self-employed and I know that if all the tools I own are stolen it could well crush my dreams of having my own business.”
Vinnie
are found to be flagrantly available to buy
“What isn’t fully appreciated is the knock-on effects of being deprived of your tools,” explains Peter Booth.
“If they’ve done damage to your van that’s then off the road, and even if you are still mobile you can’t do the job anyway without the right equipment We hear a lot of advice, such as make sure you’re removing tools at night, but you’re just not safe anywhere now
“It can happen while you’re parked up outside a job, at a supermarket and countless other places. We’re living in constant fear of being deprived of the means to make a living ”
Lack of action
It is a perceived lack of action on the part of the police and insurers that is actually exacerbating the situation
When insurers will only pay out on the basis of the depreciated value of the tools, and the chances of recovery by law enforcement are vanishingly small, the victims stop reporting When that happens the true scale of the issue sinks from view This is an acquisitive crime and if thieves think that they can not only get away with it but make a tidy profit, that’s all the motive they need
At the same time, without a court appearance judges won’t hear impact
“I’ve noticed over the last couple of years it’s definitely got a whole lot worse.”
Joe Short
reports before sentencing and are blind to the body blow it delivers to trade workers
The sheer number of vans that made the journey from the north London shopping area to the seat of government is indicative of the scale of the problem. Moreover, at a time when small businesses are under significant pressures, the impact on mental health shouldn’t be underestimated
The Trades United Van Rally certainly served its purposes of making tool theft visible Their destination was a square looked down upon by the House of Commons, Big Ben and statues of some of our most distinguished parliamentarians
“It’s not just the tools stolen. It’s the damage and downtime to vehicles that costs as well.”
R Lange Construction
Ordinary hard-working tradies gridlocked the roads and its approaches, whilst sign written vans were turned into protest placards, and megaphones left the public in no doubt as to their cause
It wasn’t just tradespeople either with charities like Band of Builders and major industry brands joined in solidarity. It now requires our politicians to pick up the mantle
4 WAYS TO PROTECT TRADES FROM TOOL THEFT
Awan (pictured) and Trades United are calling for meaningful action as a matter of urgency:
● Update The Theft Act 1968 Section 27 (3) a/b so that there are longer sentences for repeat offenders who have already been convicted of either theft or handling stolen goods
● Revise Equipment Theft (Prevention) Act 2023 to include heavy fines/penalties for establishments that allow the sale of stolen tools including – but not limited to – pawn shops, markets and car boot sales
● Consider the crime of tool theft an aggravated offence
● Increase funding for the police and introduce specialist personnel.
Shoaib
THE WISER CHOICE FOR SMART HEATING CONTROL
Whether it’s replacing old for new, helping to improve efficiency, or creating a connected home for their customers, we find out why Wiser is the smarter option for electricians fitting heating controls.
This easy-to-use system can be managed via the Wiser Home App on a smartphone at any time from anywhere in the world, making it an ideal solution for customers with busy lives or unpredictable schedules For those who prefer to use a physical controller, Wiser also comes with a Wireless Room Thermostat, which can be placed anywhere around the home without any hassle
For customers looking to upgrade their current or new heating system with an intuitive heating control, Wiser is packed full of features that will make a difference
Multi-zone control
Electricians can easily turn any heating system into a multi-zoned system with ease thanks to the Wiser Radiator Thermostats When installed on radiators throughout the home, it’s easy to create individual rooms, which can also be grouped together into zones, all of which can be set to their own temperature and even have their own schedule
Plus, the system is easily scalable, so
even if electricians are only fitting a handful of Wiser Radiator Thermostats during the initial install, more can be added later down the line if required, up to a maximum of 63 devices and 16 rooms
Smart modes
Multi-zoned heating control is just one of the ways that Wiser can help improve efficiency, as the smart heating control offers access to smart modes too With these features together, electricians fitting Wiser can help their customers achieve savings of up to 30% on the average energy bill
This is acheieved by optimising the heating to minimise consumption. A multi-zoned system and Away Mode both prevent wasted energy, by ensuring empty rooms, or an empty home, aren’t heated unnecessarily
Meanwhile, Eco Mode combines optimum stop and weather compensation to study the thermal properties of the home and learns to switch the boiler off sooner than scheduled, whilst still maintaining the set point to reduce energy consumption
Total control with one App
No matter the type of system electricians are working on, the Wiser system is a suitable option Thanks to the Underfloor Heating Controller and Electrical Heat Switch, it can even be used on electrical heating and hydronic underfloor heating, while mixed heating systems can all be controlled with just one App.
When it comes to installation, Wiser is designed to make this as simple as possible, regardless of whether it’s a new install or replacement job For example, Wiser is compatible with the standard UK wallplate, found within 80% of homes in the UK. Plus, the system can be set up without the need for the login details of the customer’s Wi-Fi network
Finally, should technical support be required when working with Wiser, Drayton’s UK-based customer support team is on hand to assist
Plus, a Wiser training course is available on Drayton’s Rewards+ platform, where installers can also earn points on registered products as well as access extended five-year warranties
Upon completion, electricians will gain Wiser Approved installer status, which means they’ll benefit from getting their details listed on the Wiser website for new consumer leads
LEARN MORE ABOUT THE WISER SMART HEATING CONTROL SYSTEM BY VISITING:
Fire and security qualifications for electricians
In this regular column, offering advice and updates on electrical qualifications and recommended training routes, Kevin Sparrow, Industry & Portfolio Manager at EAL Awards, looks at the various opportunities for electricians to diversify into fire and security work.
An important area that electrical contractors work in and can diversify into is fire and security systems In particular, expanding expertise to include fire alarm systems offers contractors several significant advantages to cater to a broader client base.
At EAL, we’ve collaborated with fellow PE contributor Dr Tom Brookes, a Chartered Engineer and Chairman of the Fire & Security Association (FSA), to develop a number of regulated fire qualifications. These awards help contractors understand the range of specialised standards and enable them to understand the legal and safety requirements associated with these life-critical systems
Our first collaboration was the award-winning EAL Level 3 Award in the Commissioning, Handover, and Servicing of Fire Detection and Alarm Systems to BS 5839-1
An updated 2025 version of the award is due this year to coincide with the revised standard, so it’s a great opportunity for electricians to undertake this award, learn about fire alarms in non-domestic premises, and gain a regulated and industry-supported qualification
More recently, working with Tom and our industry partners, we’ve created an award for fire alarms in dwellings (EAL L3 Award in the Requirements for Fire Detection and
Alarm Systems in Dwellings) This offers another great way for lectricians to re-enforce learning and gain a deeper understanding of these life-saving systems
The focus of this award is on fire detection and alarm systems within Grades D - F, but it also covers Grades A and C. The award introduces the various key legislation and regulations that apply in dwellings but also helps electricians recognise that UK nations have different minimum requirements or recommendations for fire detection and alarm systems in dwellings.
There’s a range of British Standards, Regulations, and Acts that apply in these locations, as well as understanding the interaction between BS 5839-1 and BS 5839-6, (for example, in a shared building or HMO). One area that electricians may be unfamiliar with is how a fire can spread in a building, its spread mechanisms, and the requirements for a fire risk assessment A these areas are covered in important award.
A more recent novel awa developed was the EAL Lev Award in the Commissionin Handover, and Servicing of Detection and Alarm Syste to BS 5839-1.
Focusing again on non-domestic systems,
this is another important award for electricians/fire engineers to learn about commissioning fire alarm systems and likely consolidate and deepen their understanding.
It is an inspection and testing award for fire alarm systems which fully covers the understanding and practical skills involved with commissioning these systems
We’re proud of the awards we’ve created with Tom, FSA, and industry partners, including NICEIC/Certsure. At EAL, we’ll endeavour to help you upskill in these important areas, enabling you to gain recognised and regulated qualifications and grow in your career
Stay in touch with the latest updates by joining the BSE LinkedIn group at: www.linkedin.com/
Get further information on EAL’s Building Services Engineering qualifications at: WWW.RDR.LINK/EBM011
REVOLUTIONISING ELECTRICAL INSTALLATIONS
Following its successful foray into the consumer unit market in 2021 with its comprehensive Elucian range, Click Scolmore is ready to further revolutionise electrical installations with the launch of its new Elucian three phase distribution board collection.
Scolmore has invested significantly to bring to market an extensive range of three phase metal distribution boards, protective devices and accessories
Developed with the installer as the focus, and sold exclusively through the professional electrical wholesaler channel, the new Elucian three phase range has been designed to deliver reliable performance, safety, and flexibility for large residential and small commercial and industrial installations, ensuring compliance with the latest industry standards
Regulation compliant Elucian’s distribution boards are designed and engineered to deliver consistent, high-performance results, making them a trusted choice for professionals Each board undergoes rigorous testing to meet and exceed BS EN 61439-3 standards, ensuring compliance with safety, durability, and functionality requirements
This thorough process guarantees that the products will provide dependable, long-lasting solutions for even the most demanding electrical installations, whilst offering peace of mind to installers and ensuring compliance with BS 7671
The full Elucian three phase range consists of distribution boards, extension boards, circuit protective devices, energy meters and accessories
Three phase distribution boards
The range comprises a total of seven distribution boards – 4, 6, 8, 12, 16, 20 and 24 way. Designed with a modern finish, they boast a number of key features:
● 4 and 6 way boards – developed specifically to only work with a 125 A incomer, ensuring optimal performance and compatibility for safe and efficient power distribution. They’re supplied with gear tray and busbars pre-installed
● 8, 12, 16, 20 and 24 way boards – offer versatile configurations, allowing the installer to choose between any Elucian RCCB, 125 A Isolator, or 250 A Isolator
● Device alignment – the boards will maintain device alignment when fully installed, ensuring a neat and organised appearance
● Quick release doors – fitted with spring clips, making them quick and easy to remove
● SPD installation – SPD for the 4 and 6 way boards can be installed on additional phase connectors On 8 way and larger boards, it can be integrated into the main switch or busbar
Circuit protection devices
The circuit protection devices range is designed to populate the three phase distribution boards and extension boxes
The evolution of the Elucian range to move into three phase calls for larger sized devices (3 Pole and 4 Pole), higher rated/breaking capacity devices (10 kA) and D Curve devices. These devices are ideal for
safeguarding complex electrical systems while ensuring seamless operation and compliance The range comprises:
● Mains isolator switches – 3 and 4 pole 125 A and 250 A
● Residual Current Circuit Breaker (RCCB) – Type A and B
● Surge Protection Device (SPD) – Type 1 and 2 and Type 2
● Arc Fault Detection Device (AFDD) –available in B and C curves (AFDD+MCB in B curve only)
● Miniature Circuit Breaker (MCB) – 1 and 3 pole B, C and D Curve (6 A to 63 A)
● Residual Current Circuit Breaker with Overcurrent Protection (RCBO) –available in B and C Curve.
● Three phase multi-function energy meter kit – designed for seamless integration into all the distribution boards Supplied as a complete kit
● Blanks – Single and three way Din Rail blank module with 125 A and 250 A adaptors.
Accessories
A range of essential accessories is also available These include three phase to single phase converter, 125 A and 250 A busbar caps, three phase isolator locking kit, three phase RCD link kit, RJ45 cable (1,500 mm), gland plates and blank plates
MORE DETAILS ON THE NEW ELUCIAN THREE PHASE DISTRIBUTION BOARD RANGE BY
Working on your own? Need some technical advice? Don’t know where to turn? Ask Megger What it doesn’t know about installing and testing electrical systems isn’t worth knowing Every question will be answered by the Megger Technical Team, and the best will be published in Professional Electrician So, take advantage of the ‘ every question answered’ guarantee today Email your questions to: meggermeasures@hamerville co uk
You ask:
I WANT A ROBUST AND COMPACT TESTER THAT I CAN TAKE ANYWHERE AND USE TO RELIABLY PROVE THAT CIRCUITS ARE DEAD BEFORE I START WORKING ON THEM.
WHAT DO YOU RECOMMEND?
Megger says:
You need a two-pole tester but, as this is a safety critical application, you should be sure that it complies with the relevant standard: IEC/EN 61243-3 You’ll also need to confirm that it will continue to show whether circuits are live, even if its batteries are flat or missing Our recommendation is the Megger TPT420 This has an LED display that gives a quick indication of the voltage in the circuit under test and an LCD panel that gives a three-digit voltage readout It measures up to 1,000 V AC and 1,500 V DC, and it doesn’t trip RCDs It has a handy continuity test function plus, for added safety, an acoustic sounder for both continuity and voltage measurements There’s also a torch feature that’s useful when working in poorly lit locations The TPT420 has an IP64 ingress protection rating and is supplied with GS38 probe tip shrouds Don’t forget that when proving a circuit is dead, you’ll also need access to a known live source to check your tester For this, the Megger MPU690 proving unit is an ideal companion for the TPT420
We learn more about why one electrician has swapped self-employment for a permanent role with British Gas, and the impact this has had on his professional and personal life.
ALEX’S NEW PURPOSE
For over 20 years, Alex Ward built a successful career as an electrician, including six years of running his own business
But with the arrival of his first child, his priorities shifted and it was time to make a change
Alex took on significant clients, completed major projects, and had the freedom to be his own boss But with his son on the way, he needed stability, a steady income, and, most importantly, more time in the evenings to be with his family That’s when he decided to make the jump to British Gas
Professional and personal challenges
B
s o m e w e e k s , A l e x c o u l d e a r n u p t o
He continues: “It’s so hard to be the person that’s getting the work, doing the work, and then invoicing for it, all while trying to concentrate on your son’s birthday party at the weekend without forgetting to order the ballpit!”
“Where evenings were rarely free previously, it’s nice now to just go home, make the baby’s dinner, give him a bath, and not have to get back on the computer afterwards or deal with customer calls late at night.
“When you run your own business, people happily call you at 8 30 or 9pm My wife used to say: ‘That’s when they’re free, they’ve finished their work ’ But that was my downtime, and it was always getting interrupted.”
The move to British Gas
With the time right for a change, joining British Gas offered Alex security, a structured work schedule, and a clear separation between job and personal life
was also amazed by the benefits on offer, which included dental care, discounted gym memberships, and paid holidays
He recalls: “Before, if I didn’t work, I didn’t get paid – simple as that! I’m still wrapping my head around having a set number of paid holiday days per year It’s all new to me
“Now, I have the capacity to sort out my plans over the next year and get holidays booked in ahead of time Before, I wasn’t really able to make future plans and things would just creep up on me.”
Words of advice
For those contemplating leaving self-employment for a more structured role, Alex has a clear message: “100% go for it – especially if you’ve felt any of the things that I’ve spoken about here.
“You have to be really organised to live like that – to keep things steady and budget properly,” he says
“The job itself wasn’t the problem, as there’s not much I can’t do electrics-wise It was everything else – the constant juggling act of winning work, pricing jobs, completing them, invoicing clients and chasing payments was draining.”
He says: “It’s nice to go from being all over the place with work to knowing exactly when I’ll finish each day Before, it was like: ‘I’ll have dinner in a minute, I just need to send this invoice first ’ Now, it’s: ‘Right, today is done, I’ve signed off from work ’”
The transition wasn’t just about having a stable income, as British Gas also provided comprehensive training and support. Alex
“I don’t regret any of the years I dedicated to self-employment, however I greatly appreciate the peace of mind I have now These days I can just get on with my work No distractions, no late-night calls – just a proper work-life balance.”
ENTER THE CPD ZONE AND EARN 1 CPD CREDIT
TOWARDS YOUR PROFESSIONAL RECORD!
continuing professional development (CPD) can be broadly defined as any type of learning you undertake which increases your knowledge, understanding and experiences of a subject area or role. To help professionals to better document and prove this process, our CPD Zone contains content and articles that have been checked, verified and accredited by a third-party specialist organisation
Collectively, the content within this section has been deemed worthy of 1 x CPD credit, or one hours’ worth of CPD
Once this content has been consumed, readers will have the opportunity to scan a QR code which will provide a bespoke, downloadable certificate that can be used as part of a
professional’s ongoing CPD record
This means that if you’re a monthly reader of PE, you could earn up to 11 credits, or 11 hours’ worth of CPD, just by reading a regular copy of your favourite independent industry magazine in 2025
DO NOT SCAN THE QR CODE UNLESS YOU HAVE READ ALL OF THE CONTENT WITHIN THIS SECTION!
A large element of CPD involves self-certification and relies on professionals being honest about what they have actually read, consumed and digested A QR code and RDRLink code have been placed with the final article in this month’s CPD Zone and ONLY once you have read ALL of the articles within this section, should you then scan/enter the code to receive your bespoke certificate
By skipping any of these steps, you’re not just cheating the system, but yourself and your fellow professionals at the same time!
NEW USERS – ACCESS YOUR BESPOKE CPD CERTIFICATE IN FIVE STEPS
1. Read ALL of the content and articles included within this month’s CPD Zone
2. Scan the QR code or enter the RDRLink code with the last article in this section
3. Enter your email address.
4. Fill out your details on the contact form.
5 Download your certificate for use as part of your annual CPD record
PREVIOUS USERS – ACCESS YOUR CPD CERTIFICATE IN FOUR STEPS
1. Read ALL of the content and articles included within this month’s CPD Zone
2. Scan the QR code or enter the RDRLink code with the last article in this section.
3. Enter your name and email address.
4. Download your certificate for use as part of your annual CPD record
All certificates are valid for one year from the issue date If you’re having any issues with downloading your certificate or using the system, please email us at: pe@hamerville.co.uk
THE CODEBREAKERS
BRENDAN O’CONNOR: THE CUSTOMER WANTED A SECOND OPINION ON A BOARD CHANGE “ THE WORST DIY JOB EVER” WAS A FAIR OPINON, DON’ T YOU THINK?
When elec tricians are called to site and come across poor standards of installation work carried out by householders this does cause a great deal of frustration (and rightly so)
There is a lack of protec tion from the sharp metal edges of the consumer unit k nockouts for the meter tails and other final circuits, Regulations 522.8.5 and 526.7 have requirements for mechanical protec tion and suppor t of cables and terminations
The termination of the meter tails to the main switch has resulted in exposed copper where either the cable did not have sufficient length to re -terminate or just another poor method of installation
The unused entr y hole in the base of the consumer unit and the lack of insulation for the copper busbar allows access to live par ts.
B
The use of a black conduc tor for the ear thing conduc tor shows a lack of
k nowledge of the requirements for BS 7671, and this also appears to be undersized
Therefore, the classification code
would be a C1, D anger present, risk of injur y, immediate remedial ac tion required due to the risk of contac t with live par ts. The Observations, Regulation infringements and Codes applicable to this observation would
The earthing conductor has not been provided with correct colour marking
GET THE BOOK AND CRACK THOSE CODES!
Updated for BS 7671:2018+A2:2022, NAPIT ’s EICR Codebreakers publication is purpose -written to aid contractors, inspectors and clients, and now includes updates to align with Amendment 2 of the IE T 18th Edition Wiring Regulations The book is the per fect technical aid for electrical professionals and their customers
O ften when some form of alteration has been carried out on an electrical installation, and in this case a k itchen upgrade, existing accessories are not in the correct locations for the new appliances
There are correct methods for connection
of conductors and unfor tunately covering open connectors with insulation tape and then covering with plaster is not one of them
There is a lack of suppor t or protection against abrasion for the cables, including the location of the concealed cables where they
are no longer in the prescribed zones due to the removal of the accessories
Therefore, the classification code would be a C2, Potential dangerous, urgent remedial action required due to the poor terminations
KEVIN BAILEY: THIS WAS DISCOVERED ON A RECENT INSPEC TION. JUST HIDE IT BEHIND A FRIDGE AND NO ONE WILL NOTICE…
COORDINATED OVERVOLTAGE PROTECTION OF DOMESTIC PREMISES
This article from the experts at NICEIC looks at the factors to be considered when providing protection against overvoltage in a domestic premises having a service fuse of rating not exceeding 100 A per phase.
Once it has been determined that overvoltage protection is required at a domestic premises it is essential that the system put in place is sufficiently robust to provide the required level of protection throughout the electrical installation
Factors to consider
The following factors have to be taken into account when designing and installing an overvoltage protection system:
● Does the structure have an external lightning protection system?
● What is the system earthing arrangement at the premises?
● Is there sensitive equipment within the installation that may require local protection?
● What are the distances between overvoltage protective devices and the equipment to be protected?
Does the structure have an external lightning protection system?
Where SPDs are required to protect the electrical installation in a building having an external lightning protection system
(LPS) or other methods of protection against direct lightning strike, Type 1 SPDs, also known as equipotential bonding SPDs, must be installed as close as possible to the origin of the electrical installation (534 4 1 3)
These Type 1 SPDs are installed to prevent dangerous sparking which could lead to fire or electric shock hazards However, such SPDs, installed alone, do not provide protection against failure of sensitive electrical and electronic systems As a result, it is necessary to install additional SPDs of Type 2 and/or Type 3 to protect equipment within the installation (see Note to 534 4 1 1) Typically, most modern equipotential bonding SPDs will be combination Type 1 + 2 devices
Where Type 1 SPDs are installed at, or near, the origin of the installation, each live conductor shall be connected to either the main earthing terminal or the main protective conductor – whichever route is shorter. This is known as Connection Type 1 (CT 1), or
common mode protection – see Fig 1.
Where the Type 1 SPDs are selected using BS 7671, rather than carrying out a risk analysis in accordance with BS EN 62305-2, the impulse discharge current of the SPD (Iimp) shall not be less than the values stated in Table 534 4 (534.4.4.4.2). For Connection Type 1, the minimum permissible Iimp is 12 5 kA whether connection is between L-PE or N-PE for both 1-phase and 3-phase supply systems
Where a structure has an LPS, a coordinated SPD system connected in
both power and signal lines is required (Clause 7 of BS EN 62305-41) as part of an overall surge protection management plan (Clause 9 2 of BS EN 62305-4)
As a result, where a structure has an LPS, the surge protective measures should preferably be designed in accordance with the BS EN 62305 series and not Sections 443 and 534 of BS 7671
System earthing arrangement at the premises
Where SPDs are required by Section 443 to protect the electrical installation in a building not having an external LPS, or not requiring protection against the effects of direct lightning, Type 2 SPDs must be installed as close as possible to the origin of the electrical installation (534 4 1 4)
Where the building is not protected against direct lightning strike, the Type 2 SPDs for use at or near the origin of the installation shall be selected based on their minimum nominal discharge current (Inspd) and the Connection Type employed (534 4 4 4 1)
Where Type 2 SPDs are installed at, or near, the origin of the installation, the
choice of Connection Type that is required is dependent on the system earthing arrangement
Combination Type 2+3 devices are readily available
TN system
Where the installation forms part of a TN system, in general both Connection Types CT1 and CT2 may be employed
Whereas Connection Type CT1, described earlier in this article, sees line and neutral conductors connected to protective earth (PE), with Connection Type 2 (CT2) the SPD is connected between line and neutral and between neutral and PE via either the main earthing terminal or the protective conductor – whichever route is shorter Connection Type 2 (CT 2) is also referred to as differential mode protection (534 4 2 & 534 4 3) – see Fig 2
TT system
Typically, an RCD providing fault protection will be situated at or near the origin of an installation forming part of a TT system The presence of this device affects the choice of permissible Connection Type
● Where Connection Type 1 (CT1) is used, the SPD arrangement should be installed downstream of any RCD at or near the origin to provide fault protection – see Fig 3
● Where Connection Type 2 (CT2) is used, the SPD arrangement should be installed upstream of any RCD at or near the origin to provide fault protection – see Fig 4
● It should be noted that it is not recommended to install Type 1 SPDs downstream of an RCD (534.4.7).
Table 1 (pictured above) is based partially on Table 534 5 of BS 7671 and summarises the possible modes of protection that may be required for various LV systems in domestic premises.
Is there sensitive equipment within the installation that may require local protection?
In a typical domestic premises, containing more commonplace, readily available and, relatively speaking, moderate value electrical equipment the overvoltage protection installed at the origin will generally be sufficient regardless of circuit length
However, where high-value items such as high-end home cinema equipment or hard to replace items of equipment are present, additional overvoltage protection from Type 2 + 3 SPDs should be installed close to the
equipment to be protected These may be situated in fixed socket-outlets or in mobile socket-outlet trailing leads conforming to relevant product standards, see Fig 5 (534 4 1 1) or within consumer units serving the equipment to be protected (534 4 1 5)
What are the distances between overvoltage protective devices and the equipment to be protected?
If the distance between an SPD and the equipment to be protected exceeds 10 m, it may be necessary to install additional SPDs between those at or near the origin and those close to sensitive equipment (534 4 4 2) Additional SPDs may also be required if the protection level (Up) of the SPD at/near the origin of the installation is higher than the impulse immunity of the equipment
In general, neither of the above factors is applicable in most domestic premises, as there are typically no inductive loads within the
structure which could be a source for switching transients downstream of the SPD installed at the origin of the installation
What about home offices or workshops external to the dwelling?
Many people now work from home either fully or in a hybrid capacity in small offices or workshops Where these are situated in the main body of the domestic premises, as mentioned previously in this article, the overvoltage protection provided at the origin of the installation is likely to offer sufficient protection against overvoltage.
However, if the home office or workshop is in a building separate to, but supplied from, the dwelling overvoltage protection may be required as a result of the distance between the SPD at the origin of the dwelling exceeding 10 m and where the damage caused by an overvoltage could result in significant financial or data loss (443 4 1)
This overvoltage protection may be incorporated in a small locally installed consumer unit (534 4 1 5)
Summary
In general, for a ‘typical’ domestic dwelling, a single surge protective device (SPD) installed in or close to the consumer unit serving the property will be sufficient However, in some cases, such as where connected equipment of significant value is present or where a supply extends to buildings separate to the dwelling, it may be necessary to install further suitably coordinated SPDs of the correct type situated close to the items to be protected
We would like to acknowledge the kind assistance of Samad Khan of ABB Furse in the production of this article
Steve Dunning, Managing Director of Martindale Electric, advises on how to ensure you are carrying out Portable Appliance Testing (PAT) correctly.
12 DEADLY PAT SINS
Every year, a significant number of electrical accidents, many involving portable appliances, are reported to the Health and Safety Executive (HSE) in the UK In accordance with the Electricity at Work Regulations (1989), any electrical equipment that has the potential to cause injury must be maintained in a safe condition
Designed to help raise the standards of electrical safety in the workplace, portable appliance testing ensures that electrical appliances and equipment which have been classified as “portable”, are safe to use
For the purposes of PAT testing, portable appliances are defined as those that use a flexible cable or plug and socket This means if an appliance has a plug connected to a wall socket or generator, it should be PAT tested This definition includes either hand-held or hand-operated equipment,
intended or likely to be moved (Refer to the Fifth Edition of the IET Code of Practice for full definition)
To help companies with their portable appliance testing strategy there are many commercially available PAT training courses These are invaluable to help provide the necessary theoretical and practical knowledge to undertake testing and inspecting different electrical appliances
While the Fifth Edition of the IET Code of Practice emphasises the need for risk assessment, partly to reduce unnecessary testing, it still requires that a competent person carry out Portable Appliance Testing
When undertaking inspection and testing, a training course will provide a high level of knowledge needed and give invaluable information on the right test equipment to use, the ability to use it properly, and the ability to properly understand the test results
However, even for an experienced user of portable appliance testers there are 12 potential errors which need to be carefully avoided:
1) Lack of visual inspection
It may seem obvious, but before you measure the condition of an appliance, make sure that all its parts are there – and in good condition Any signs of damage should be reported as well as any dents/scratches on the casing These can indicate that the appliance has been dropped or handled incorrectly at some point in its life. If the cable shows signs of wear or isn’t plugged in properly, this should be recorded as it could indicate that the appliance is unsafe
2) Not carrying out the tests in the required order
If on a Class 1 appliance you do the insulation test first, you don’t know if the
conductive earth path is good (in Class 1 appliances most PATs use the earth wire as the return signal path, which is why you don’t need to use a probe for the insulation test) If the earth path isn’t tested and proven good, you can’t rely on the insulation test
3) Forgetting to switch the appliance on Think about the situation where the live wire is broken inside the appliance and touching the outer casing. When you do the insulation test, everything inside the appliance should be at 250/500 V The tester detects (via a probe or the earth wire) any voltage escaping to the appliance housing But if you haven’t switched it on the voltage can’t get through the live wire, nothing will escape and you could have an incorrect pass of a dangerous appliance
4) Touching the appliance
The reality is that most appliances pass the insulation test, so you get into the habit of holding drills etc to make it easier to hold the probe in contact Then one day the appliance insulation fails and results in a shock
5) Only conducting one earth bond test
If an appliance has multiple, apparently isolated, outer parts with separate earthed paths, each one needs to be separately measured (some of the earliest testers had standard test sequences that only expected you to do one earth test)
6) Taking an average reading
If you have multiple earth paths, don’t take the average reading – it’s the worst case that matters
7) Trying to undertake an earth bond test on a Class II appliance
It will, of course, fail as Class II appliances have no earth This is a very common problem and causes a large number of calls to technical helplines
8) Only carrying out one insulation test
For the same reason as #5, this is a common fault. At how many places on a power tool could the insulation break down? Obviously at the chuck, but what about the ventilation slots, the trigger, the assembly screws, the speed control?
9) Not checking the fuse is conducting (see point #3)
10) Failing to conduct a functional test (powering it up)
Some entry level PATs don’t have the ability to power up the appliance. If your PAT tester doesn’t then plug the appliance into the wall socket (after PAT testing) and make sure it works properly Putting your initials on a PASS label for an appliance that doesn’t work or is obviously faulty is a bit embarrassing
11) Not testing at the correct voltage
It’s very common for people to make the mistake of performing a 500 V test on surge protection extension leads These require a lower voltage 250 V test, which is especially helpful when testing appliances with surge protected circuits, such as sensitive IT equipment at 250 V
12) Not calculating the correct pass level
Many appliances use longer power cables than those specified by the manufacturer. The current pass level for an appliance with a longer power cable is calculated differently than the pass level for an appliance with a shorter power cable The current pass level for an appliance with a longer power cable can be determined by a calculation available in the PAT code of practice
Given the importance of PAT testing and the wide variation in operating environments and equipment to be tested, it is extremely important to ensure the right equipment is selected to suit the application Often overlooked but vitally important when choosing a tester is to ensure all bases are covered not only on appliances but also with mains extension leads
It’s also important to consider accessories early in the selection process such as labels and adaptors for appliances etc. Ideally, a unit will have a good range of readily available accessories for use across a wide range of applications
Yo
BUGS IN THE SYSTEM
Steve Humphreys, Technical Commercial Manager at NAPIT, discusses the concept of parasitic capacitance in solar PV installations.
Parasitic capacitance might not be a term most electricians know or have even heard of It may even drum up images of bugs or other creepy crawlies in our electrical installations You might be more familiar with capacitance, perhaps from your college days, as the ability of two conductors, separated by an insulating material, to store an electric charge
The term parasitic capacitance is used to describe any ‘unintended’ or ‘stray’ capacitance in electrical and electronic equipment, conductors and components. It basically arises because any two conductive objects in close proximity have the ability to store an electric charge and create a capacitance
Now we know what it is, we’ll look at parasitic capacitance in relation to solar PV systems (Fig 1) and in particular solar PV modules
Parasitic capacitance in solar PV modules
By their design, all solar PV modules will
have an electrical capacitance in relation to their environment This capacitance typically forms between the solar PV modules electrical conductors and surroundings, such as the frame, mounting structure, or the Earth itself.
It’s worth pointing out that this capacitance has no bearing on the functionality or operation of the PV generator, hence the terms ‘unintended’ or ‘unwanted’
The presence of the capacitance is dependent on the component parts of the solar PV system in relation to the design and installation methods This will include the physical layout of the component parts of the system, the
equipment used and where the equipment has been installed
Evidence suggests there are several factors that contribute to the presence and level of parasitic capacitance in solar PV systems
Transformerless inverters
During the normal operation of a solar PV system, the PV modules are connected to the grid supply via the
Fig 1: PV modules and a mounting system being installed on a residential property
Fig 2: Individual parasitic capacitances that can occur on a PV module, C1 due to moisture on outer glass, C2 due to support frame and C3 due to roof surface area
conditions, where C1 is not applicable, the overall capacitance created by C2 and C3 is likely to be very small and therefore will not affect the solar PV system
inverter When transformerless inverters are used they can potentially allow the passage of AC voltage from the installation supply side to the DC side of the solar PV system.
This alternating voltage amplitude appears at the PV module, and as a result, the PV array oscillates with an alternating voltage in relation to its environment
In single-phase transformerless inverters, up to half the AC voltage is passed on to the PV module i e 115 V/50 Hz In three-phase systems, the pass-through of AC voltage is largely supressed and therefore a much smaller voltage amplitude appears on the DC side of the system
The issue of having this fluctuating AC
Weather impact
The effect of parasitic capacitance can increase with the size of the solar array, as larger systems have more conductive surfaces
How does parasitic capacitance affect solar PV systems?
a) Leakage currents
voltage on the DC side of the PV system is that it constantly changes the state of charge and therefore the level of parasitic capacitance on the PV array
In the UK, where high humidity, dew and frequent rain are common, moisture can increase the impact of parasitic capacitance This is because the moisture can enhance conductive paths and in turn worsen leakage currents. As shown in Fig 2, we have three individual capacitances – C1, C2 and C3
In wet conditions, the overall capacitance is dominated by the capacitance created by C1 due to water on the glass Therefore, C2 and C3 do not need to be considered. In dry
As mentioned earlier, when transformerless inverters are used, they can potentially allow some AC voltage from the installation supply side to the DC side of the solar PV system This means that where there is a voltage and a resistance, there will be a current. In the solar PV system, the DC side will produce parasitic capacitance leakage currents
This leakage current has the potential to flow through a person who may be touching the PV array and in contact with any earthed metalwork. Where standard modules with crystalline silicon cells are installed, the total parasitic capacitance could be around 396 nF (nanofarads) This equates to a potential leakage current of 14 mA Other types of modules, such as thin-film, could have higher leakage currents of around 20 mA
With an AC voltage of up to 115 V and leakage currents reaching potentially dangerous levels, great care is required If a person touches the array and is in contact with a path to Earth, they will receive an electric shock; it may not be sufficient to cause injury, but might be enough to cause difficulties when working at heights on scaffolding or work platforms, see Fig 3
b) Inverter efficiency
Parasitic capacitance affects the inverter’s performance, especially when it converts direct current (DC) from the solar panels to alternating current (AC) Inverters can misinterpret leakage currents as faults or disturbances, potentially reducing efficiency and causing operational issues. This could
Fig 3: Diagram showing electric shock risk due to parasitic capacitance
Fig 4: Example of earthing on the PV array framing system
cause residual current devices (RCDs) to operate or the inverter to shut down or run suboptimally
c) Electromagnetic Interference (EMI)
Parasitic capacitance can cause or worsen electromagnetic interference (EMI) in solar PV systems, which can affect nearby communication devices and systems. In highly dense areas, like cities in the UK, managing EMI is critical to ensure compliance with regulatory standards
So, what on Earth do we do about it?
To deal with the effects of parasitic capacitance, designers, installers and inspectors can take some reasonable and fundamental steps.
Firstly, compliance with BS 7671 ensures that safe electrical design practices are followed to mitigate these effects A careful and considered design would involve using high-quality inverters with better filtering capabilities and ensuring proper insulation to reduce the effects of environmental factors such as moisture
A well thought out and robust risk assessment and method statement (RAMS) will be required to highlight the dangers of parasitic capacitance and safe working procedures This could include the use of scaffolding, other access equipment and possible insulation of metalwork
A safe system of work (SSoW) will need to be in place to ensure isolation of the inverter before any maintenance or cleaning of the array takes place. Other steps that can be taken include the option to install a 30 mA RCD on the AC side of the transformerless inverter This option could cause unwanted tripping and there is also still a risk of electric shock before the RCD operates
Another option is to Earth the PV modules and array framing system, as shown in Fig 4 This option, at face value, does seem sensible and would divert the voltage to Earth. However, it does create other possible issues around lightning protection, labelling for high protective conductor currents and creating a further shock risk with other extraneous and/or exposed conductive-parts
Conclusion
With the recent upsurge in renewable technology installations, such as solar PV systems, it’s more important than ever to ensure that designers and installers are fully aware of issues such as parasitic capacitance
Hopefully, this article has highlighted what parasitic capacitance is, how it affects PV systems and what steps can be taken to mitigate against it.
Visit NAPIT Direct to find out more about the NAPIT Practical Guide: Solar Photovoltaic Systems publication: https://rebrand.ly/SolarPV
The column where you get to put your lighting questions to the head of the Ovia lighting business, Mike Collins, and his team of technical experts.
QWHAT
CCT DO YOU RECOMMEND FOR HEALTH CARE ENVIRONMENTS SPECIFICALLY?
CCT (Correlated Colour Temperature) in lighting refers to the colour appearance of a light source, measured in Kelvin (K) It describes whether the light appears warm (yellowish) or cool (bluish) The CCT Scale is as follows:
● Warm White (2700K - 3000K) – a soft, yellowish light similar to incandescent bulbs.
● Neutral White (3500K - 4500K) – a balanced, natural white light
● Cool White/Daylight (5000K - 6500K) – a bright, bluish-white light, similar to daylight
As far as healthcare environments are concerned, it would depend on the specific areas being considered A general overview of recommendations is as follows:
● For patient rooms and recovery areas where a warm and calming lighting solution would be required a CCT of 3000K is recommended
● For operating theatres and examination rooms where a brighter, cooler light for high visibility is necessary, the recommendation would be a CCT of 4000K - 6000K
● For nurses stations and corridors a balanced light that supports alertness but is not too harsh is required, with a recommended CCT of 4000K.
● For waiting areas warmer tones to offer a welcoming and soothing environment could be created with a CCT of 3500K - 4000K
A more important requirement for a surgical area would be that the CRI (Colour Rendering Index) should be 90 or higher CRI measures how well a light source shows colours and works on a scale from 0 to 100, with 100 being the best. Among the luminaires from Ovia’s commercial range that offer suitable CCT solutions are the Inceptor Slate Backlit power and CCT switchable LED panels and the Sprite recessed TRIAC dimmable LED downlights with CCT switch
In every other edition, the NICEIC's team of expert technical engineers will address crucial questions they've received. Here are some of the most recent enquiries.
For compliance with BS 7671, can a 230 V AC fan be installed in Zone 1 of a domestic bathroom?
a) Yes b) No
The answer is a) Yes
Regulation 701 55 states that: “In Zone 1, only the following fixed and permanently connected current-using equipment shall be installed, provided it is suitable for installation in Zone 1 according to the manufacturer’s instructions:” and the list includes “(viii) Ventilation equipment”
Therefore, as the fan would fall within the definition of ventilation equipment, its installation would be compliant providing the manufacturer confirms that it is suitable for installation within Zone 1 of a bathroom and the fan has a minimum degree of protection of IPX4 against external influences.
The required external influence is specified in Regulation 701 512 2 which states that: “Installed electrical equipment shall have at least the following degrees of protection: (i) In Zone 0: IPX7 (ii) In Zones 1 and 2: IPX4”.
Which of the following should NOT be used as an earth electrode?
a) structural metalwork b) lead sheath of cables
c) water utility pipework d) earth tape
The answer is c) water utility pipe
Regulation 542 2 2 states that: “Suitable earth electrodes shall be used The following types of earth electrode are recognised for the purposes of the Regulations: (i) Earth
rods or pipes (ii) Earth tapes or wires (iii) Earth plates (iv) Underground structural metalwork embedded in foundations or other metalwork installed in the foundations (v) Welded metal reinforcement of concrete (except pre-stressed concrete) embedded in the ground (vi) Lead sheaths and other metal coverings of cables, where not precluded by Regulation 542 2 5 (vii) other suitable underground metalwork ”
And Regulation 542 6 states that: “A metallic pipe for gases or flammable liquids shall not be used as an earth electrode The metallic pipe of a water utility supply shall not be used as an earth electrode Other metallic water supply pipework shall not be used as an earth electrode unless precautions are taken against its removal and it has been considered for such a use”
What is the minimum size of a supplementary bonding conductor if mechanical protection is not provided?
a) 2.5 mm2 b) 4.0 mm2 c) 6.0 mm2 d) 10.0 mm2
The answer is b) 4.0 mm2
Regulation 544 2 1 states that: “A supplementary bonding conductor connecting two exposed-conductive-parts shall have a conductance, if sheathed or otherwise provided with mechanical protection, not less than that of the smaller protective conductor connected to the exposed-conductive-parts If mechanical protection is not provided, its cross-sectional area shall be not less than 4 mm”.
SELECTION AND USE OF VENTILATION SYSTEMS
The team at Envirovent advises on the considerations professionals need to make when sourcing appropriate ventilation equipment for the application/environment in question.
Th e r e h a v e b e e n s i g n i f i c a n t
r e c e n t c h a n g e s t o b u i l d i n g
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v e n t i l a t i o n w i t h t h e u p l i f t s t o
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a n d Wa l e s b a c k i n 2 0 2 2 a n d t h e
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Compliant and appropriate solutions
As an electrical professional, when it comes to looking at ventilation which is a controlled service, it’s important to ensure that as well as being compliant, the chosen solution is appropriate and realistic for the property
This should take into account the type of property, any existing problems, how airtight the property is, whether a ducting route is possible, if there are any overheating, acoustic or pollution conditions, if the property is listed or of historical significance, as well as many other variables This may rely upon conversations between architects, consultants and others involved within the works
Approved Document F, Means of
“These uplifts were part of the Future Homes and Building Standard, with further updates expected in 2025, ensuring that building methods and standards align with Net Zero and beyond.”
Ventilation is used in both England and Wales to provide a minimum standard relating to ventilation within a building Both have two volumes depending upon if the building is residential or non-residential.
In Scotland, there are technical handbooks that, unlike England and Wales, contain all information in one document These provide a number of ventilation solutions which are either determined by airflow rates in each wet room, or use either the floor area or number of bedrooms for whole-house solution
The NHBC also have a set of Technical Standards that offer best practice solutions if working on new homes registered with the NHBC, in similar fashion to those mentioned earlier
The most common solutions are listed in these documents and include:
Natural Ventilation with Background
Ventilators and Intermittent Extract Fans (previously referred to as System 1) takes the form of intermittent extract fans in each wet room that are used during periods of cooking and bathing.
The airflow requirements are significant with a requirement of up to 60 l/s in a kitchen that can lead to increased noise levels, different sizes of fans for different applications to meet the increased airflows and are normally less energy efficient than twospeed fans
This solution is not suitable for airtight properties and relies upon significant levels of background ventilation such as through-wall or window trickle vents which can be impractical and difficult to retrofit
MEV or Mechanical Extract Ventilation (previously referred to as System 3) can be another option which is available as either c-MEV or a centralised solution usually in a loft or hallway cupboard that requires a ducting run, or d-MEV which is a decentralised solution in each wet room
These units extract at a low constant level out of wet rooms before boosting via a switch or sensor There is also a small amount of background ventilation required in living spaces when using this ventilation option so this should also be taken into consideration
These are also typically quieter than an intermittent solution and can be more energy efficient M e c h a n i c a l Ve n t i l a t i o n w i t h H e a t Re c o v e r y, c o m m o n l y k n o w n a s M V H R
o f a i r f l o w s
a n d m a i n t e n a n c e
These units do have a higher initial outlay cost for the customer, and require an extensive ducting system but these often include high grade filters and can provide greatly improved indoor air quality.
“There
are other ventilation solutions...
that although are not
explicitly
referred to
within some or all regulations as those listed, are seen as not exhaustive.”
MVHR units extract from wet rooms but also supply fresh, filtered air into living spaces with an integrated heat cell enabling the ability to recover some of the heat removed from the wet rooms without the added moisture before this heat is added back into the property
As a result, MVHR units are extremely energy efficient, have a number of features and benefits and can be used when there is the inability to open some or all of the windows in a property due to acoustics, overheating or similar
Other ventilation options
There are other ventilation solutions including Passive Stack or Positive Input Ventilation (PIV) that although are not explicitly referred to within some or all regulations as those listed, are seen as not exhaustive.
Providing that compliance can be proven, such as via technical certificates or testing, these are also able to be utilised if appropriate for the property
Part of the uplift to England and Wales in 2022 included additional guidance relating to ventilation in existing properties, specifically consideration to
“As an electrical professional, when it comes to looking at ventilation which is a controlled service, it’s important to ensure that as well as being compliant, the chosen solution is appropriate and realistic for the property.”
any works that have been undertaken that affect the fabric of the building, including improved glazing and insulation, as quite often the ventilation within the building will no longer be sufficient
There are other standards such as PAS 2030 and PAS 2035 which relate to energy efficiency measures in buildings and managing the installation process which can be consulted in addition to the regulations mentioned.
Collectively, these documents provide installation and commissioning guidance as well as good practice including limiting the use of flexible ducting, sizing and use of background ventilations, door widths and undercuts to ensure good levels of cross-ventilation
These regulations and incoming uplifts will continue to ensure that electrical professionals and those within the built environment are able to provide safe and healthy buildings for all.
GET MORE DETAILS ABOUT ENVIROVENT’S RANGE OF VENTILATION SOLUTIONS AND SERVICES BY VISITING: WWW.RDR.LINK/EBM020
CLAIM YOUR CERTIFICATE! SCAN THE QR CODE TO CLAIM YOUR CPD CREDIT FOR THIS EDITION OR VISIT: WWW.RDR.LINK/EBM021
ONE FOR THE DETECTORS
The smoke generated by every fire contains a mixture of particles and chemicals. The content of smoke will depend on the type of material being burned All smoke contains carbon monoxide, carbon dioxide and soot (particulate matter) In addition to these common elements of smoke, sulphur dioxide, nitrogen oxides, a variety of hydrocarbons, metals and dioxins, and the like, may also be present
One type of detector used in fire detection and fire alarm systems is the carbon monoxide (CO) detector. As all
smoke contains elements of incomplete combustion, carbon monoxide will always be present in a fire.
This article considers the use of CO detectors and where they may be best utilised
Fire detection and fire alarm systems utilise a range of detectors to accommodate a variety of fires However, it’s important that the means of detection is suitable for the nature of the fire and that any detector conforms to the appropriate Standard.
Matt Parton, Product Development Manager with leading fire and security solutions supplier, ESP, looks at the use of CO detectors and where they may be best utilised in fire alarm systems.
Means of operation of a CO detector
There are multiple ways in which carbon monoxide can be detected. The most common method is for electrodes to be immersed in a chemical solution that senses change in current flow when CO is present in dangerous quantities
A second method involves metal-oxide semiconductor (MOS) sensors whose resistance changes depending on the quantity of CO within the chamber With such detection a signal is generated and either a sounder operates or the control and indicating equipment (CIE) is triggered
“Maintenance is a key factor where CO detectors are used. As the most common types utilise a chemical means of detection, it’s important that the sensor or detector is changed every seven years.”
to sound an alarm
A third method of CO detection uses a biomimetic sensor The sensor contains a gel which changes colour when it absorbs CO, so an alarm is triggered.
Permitted use in fire detection and fire alarm systems
The commentary detailed in Clause 10 1 4 of BS 5839-6 shows that carbon monoxide fire detectors are point-type detectors which respond to the carbon monoxide present during incomplete combustion Such detectors are not equivalent to smoke detectors in their response to fire.
One caveat to the use of CO detectors within fire detection and fire alarm systems is that those conforming to BS EN 50291 shouldn’t be used in such systems CO detectors conforming to BS EN 50291 are only to be used for detecting the presence of CO potentially found in gas boilers, fires or solid fuel systems
However, this doesn’t preclude them being interconnected with the fire detection and fire alarm system in a dwelling.
CO detectors conforming to BS EN 5426 are permitted for use in Grade A systems conforming to BS 5839-6 and to fire detection and fire alarm systems conforming to BS 5839-1
It’s often the case that CO detectors are incorporated within multi-sensor heat detectors conforming to BS ISO 7240-8 or BS EN 54-30 or multisensory smoke and heat detectors conforming to BS EN 54-31.
The benefits associated with CO detectors are that they react more rapidly to fire than heat detectors and are immune to certain environmental factors which may affect smoke detectors, such as dust, steam and cigarette smoke
Maintenance is a key factor where CO detectors are used As the most common
types utilise a chemical means of detection, it’s important that the sensor or detector is changed every seven years.
Installation of CO detectors
In domestic premises, CO detectors and alarms shouldn’t be the sole means of fire detection in Grade D1/D2 fire detection and fire alarm systems Clause 10 2e) of BS 5839-6 recommends that CO detectors, and multisensory detectors containing CO detection, are only used for Grade A systems where an annual maintenance regime exists, or where a fault warning is given to indicate the need to replace the electrochemical cell
Where CO detectors are used within a circulation space, there should be an equal or higher number of smoke detectors within the circulation space (Clause 10 2f )) Furthermore, CO detectors shouldn’t be installed in kitchens
Clause 21 of BS 5839-1 details the types of detectors recognised for use within non-domestic premises. Clause 21 2g details where CO detectors may be reasonably used:
● Any area in which the use of a heat detector would be acceptable, other than those areas where the principal fire hazard comprises flammable liquid resulting in rapid flaming fire,
● Rooms opening onto escape routes in Category L3 systems,
● All escape routes within Category L3 and L4 systems, provided the CO detectors are used in conjunction with smoke detectors,
● Any other area where the fire hazard exists where test evidence shows that CO detectors offer adequate fire protection
Conclusion
Care should be taken in the selection and use of CO detectors when used within fire detection and fire alarm systems. CO detectors may be combined with heat and smoke detection in multisensory devices However, even in non-domestic premises, their use should be limited to those fires which are not rapidly flaming as they best operate where smouldering fires exist
Whilst the CO detectors used for sensing carbon monoxide created by open fires, gas boilers and the like may be interconnected with a fire detection and fire alarm system in a dwelling (Grade D1 or D2 system), they are not to be used as a means of fire detection
GET MORE DETAILS ON ESP’S RANGE OF FIRE AND CO DETECTORS BY VISITING:
PRAISING THE ALARM
Founded in 1990, Aico has experienced remarkable growth and development, consistently adapting to the ever-evolving market landscape Since its formation, the brand has cultivated a reputation for innovation, quality and excellent customer service, resulting in a portfolio of cutting-edge products and solutions that have set industry standards
This year, Aico celebrates 35 years of innovative technology, and quality alarms and sensors. In this article we learn more about how the brand has developed into a European market leader in home life safety.
Over the past 35 years, Aico has achieved a great deal. Its pioneering technology offers a variety of alarms and sensor types to guarantee full-circle protection for every home
In addition to products, education is a key part of home life safety and is at the core of everything Aico does This is reflected in its multiple award-winning CPD accredited training courses which ensure quality at every stage of the supply chain
Creating safer environments
Aico designs products to simplify the creation of safer homes This is demonstrated by the HomeLINK Connected Home Solution, which has grown to connect over 451,000 devices across the UK and 74,496 live gateway systems These systems aim to support landlords and protect residents
It’s also important that landlords are kept informed about changing legislation to ensure they continue to stay compliant. Aico has supported and empowered landlords to network, develop and learn through the development of the Social Housing Professionals Network (SHPN), as well as the SHPN roadshow
As well as educating the supply chain, Aico has seen the value of developing the knowledge of the future
With the introduction of its Corporate Social Responsibility (CSR) programme in 2018, the brand has accumulated 249 educational visits, including schools and colleges, as well as students arriving at Aico’s headquarters for the day
These visits are designed to inspire students and get them thinking about their future careers This initiative has supported over 16,400 students, and most
recently in 2024, over 3,259
Additionally, the CSR team organises the volunteering programme which has accumulated 7,547 employee volunteering hours for 247 causes. This support is set to continue and grow along with everything Aico does
Commenting on Aico’s long-term success, Neal Hooper, Managing Director, said: “It’s been an incredible 35 years of growth We’ve doubled our turnover approximately every five years whilst providing life safety solutions to millions of homes Our leading technology is being developed into new areas, further establishing our position as a dominant European manufacturer
“The fact that we have colleagues who have been with Aico for the entirety of its history, as well as a senior team wholly promoted from within, demonstrates the quality and loyalty that we’re blessed with ”
He adds: “We’d like to thank all our clients for their support since 1990, without which we would not be celebrating such a milestone following another record year. It is massively appreciated.
“And finally, to the millions upon millions of households protected by Aico, thank you for choosing our solutions, it makes us very proud We will continue to strive to provide world-class quality, innovation, service, and education for the next 35 years and beyond ”
Dedication and hard work
Aico’s progress is a testament to the dedication and hard work of the entire
team, in addition to the unwavering support of its valued customers and partners, a point that Commercial & Finance Director, Matt Small, who has been with Aico for almost 26 years, is keen to reiterate
He says: “I joined Aico as a warehouse apprentice back in 1999. Over the past 25 years, my role has evolved significantly, and my warehouse days are well behind me – thankfully, as I don’t think I could keep up these days!
“I’ve had the privilege of watching the company grow and transform over the last two and a half decades Looking back, it’s incredible to see how far we’ve come The technology behind our products has advanced dramatically, with innovations like RF connectivity, launched in the mid2000s, now commonplace
“Today, 1 in 3 installations use RF interconnection, revolutionising how our systems operate ”
Matt continues: “Similarly, multi-sensor technology has seen remarkable growth, with 1 in 3 alarms sold now being multisensors. Both innovations have paved the way for the development and expansion of more connected sensors in the home. While Aico has long been a leader in fire and gas detection, our vision has expanded to position Aico at the forefront of home life safety
“Beyond the products, it’s our people who have driven Aico’s growth I feel incredibly fortunate to have found such a supportive employer 25 years ago and to have seen my career evolve within the company. It’s great to be part of Aico’s management team, where I can continue to contribute to the brand’s success
“It’s truly rewarding to watch the next generation of colleagues begin their Aico careers, be given opportunities to develop themselves, and witness the phenomenal progress we’ve achieved in recent years I’m excited to see what the next 35 years will bring as Aico continues to innovate and grow.”
As Aico enters its next chapter, the company remains committed to innovation, customer satisfaction, and sustainability growth
LEARN MORE ABOUT AICO’S 35 YEAR ANNIVERSARY AT: WWW.RDR.LINK/EBM023
THE Q-NEX GENERATION
The Osprey floodlight range eatures cutting-edge Q-Nex Plug & Play technology. Designed for versatility, efficiency, and durability, these advanced floodlights integrate seamlessly with Q-Nex Plug & Play PIR
Sensors and Photocells, offering enhanced security and convenience for end users
Whether for domestic, commercial, or industrial use, the range combines premium lighting performance with ease of installation.
Available in 10, 20, 30, and 50 W models, the range ensures a tailored solution for every application From subtle accent lighting to high-intensity illumination, these floodlights provide a reliable, energy-efficient lighting solution for all environments
They’re packed full of features, such as:
Q-Nex Plug & Play technology
Effortlessly integrates with PIR Sensor or Photocell accessories, enabling intelligent lighting control based on motion or ambient light levels
IP65 rated for all-weather protection
Built to endure rain, dust, and extreme conditions, making it the perfect outdoor lighting choice
CCT selectable (3000K/4000K/6000K)
Adaptable colour temperature settings allow users to choose between warm
white (3000K), cool white (4000K), and day light (6000K) to suit their environment
Pre-wired for convenience
Each floodlight includes a durable 1-metre tough rubber cable for an effortless and secure installation
Smart installation
The easy-install angled bracket simplifies the mounting process on walls, ceilings, or other surfaces
Enhanced light distribution
Prismatic toughened glass optimises light output while adding impact resistance
Premium construction
A slimline diecast carbon black aluminium body ensures durability, longevity, and excellent heat dissipation
Q-Nex Plug & Play PIR Sensor –advanced motion detection
For added security and efficiency, the Q-Nex Plug & Play PIR Sensor enhances the Osprey range with intelligent motion detection Designed to provide lighting only when movement is detected, this sensor is ideal for security, safety, and energy-saving applications
Its features include:
Manual override
Offers ultimate flexibility by allowing users to keep the light continuously on when needed, bypassing motion detection This is perfect for scenarios requiring sustained illumination, such as outdoor gatherings, maintenance work, or increased security measures
Smart, efficient and robust, we learn why All LED’s latest floodlight range could be the answer to your customer’s security lighting needs.
Seamless Q-Nex Plug & Play technology
Effortlessly connects with the Osprey range for enhanced functionality.
IP65 rated durability
Weather-resistant for reliable outdoor performance in all conditions
Extensive detection range
Detects motion up to 10 metres, ensuring effective coverage
Customisable settings
Fully programmable to suit specific requirements, including sensitivity, duration and operational modes
Q-Nex Plug & Play Photocell –intelligent dusk ‘til dawn control
Take the hassle out of switching your floodlights on and off with the Q-Nex Plug & Play Photocell Designed for seamless integration with Osprey, this intelligent sensor maximises energy efficiency by automatically activating lighting at dusk and turning it off at dawn
The ultimate lighting solution
With its intelligent design and robust construction, the Osprey is the go-to floodlight choice for those seeking a premium outdoor lighting solution
Whether for enhancing security, improving safety, or illuminating outdoor spaces, these floodlights, in combination with the Q-Nex Plug & Play PIR Sensor and Photocell, provide a smart, energy efficient, and hassle-free lighting experience
Every second counts when it comes to reliable alarm signalling and monitoring utilised by businesses. Noel Sesto, Technical Director & Solution Architect at ControlFreq, explains why this presents a fantastic opportunity for electrical and maintenance professionals.
GET YOUR HEAD IN THE CLOUD
With the UK phasing out BT landlines and 3G networks, many properties still rely on outdated communication systems, putting them at significant risk of service disruptions, security vulnerabilities, and compliance failures.
To help with future-proofing alarm signalling, businesses are looking to upgrade their legacy alarm panel monitoring, with the retirement of the BT RedCare Monitoring Service presenting a significant opportunity for installers and maintenance providers to help firms transition to modern, future-proof solutions
Help is at hand
ControlFreq specialises in 4G-IoT alarm signalling hardware and a cloud-based alarm monitoring platform designed to receive live alarm signals, notify key stakeholders in real-time and monitor 4G device connectivity status
The company provides a scalable, cloud-based software branded for the installer as a recurring revenue value-add or branded directly for the end customer if required
ControlFreq offers compatible 4G-IoT alarm communicator hardware with built-in network connectivity monitoring to ensure both the alarm system and the 4G communicator operate reliably
WebAlarm delivers real-time visibility, instant alerts, and compliance assurance
for fire alarms, security panels, and emergency systems – helping businesses maintain uninterrupted protection and peace of mind
WebAlarm – real-time cloud monitoring for alarm systems
As businesses search for alternative alarm monitoring methods, WebAlarm offers installers and resellers an opportunity to provide their customers a real-time, cloud-based platform solution to monitor alarms in-house, that is customisable for fire alarms, intruder alarms, panic alarms and emergency communication systems monitoring such as lift or emergency phones
By connecting alarm systems to a ControlFreq 4G-IoT communicator (or third party hardware supporting SIA-DC09 or Contact-ID) businesses gain 24/7 in-house monitoring and secure third-party Alarm Receiving Centre (ARC) integration over SIA-DC09 or Contact-ID protocol
This ensures alarm signals reach the right recipients instantly – whether that’s in-house security teams, a third-party monitoring service, or both simultaneously
Key features of WebAlarm include:
Instant alerts
Cloud and email notifications to stakeholders for critical alarm and fault events When used with ControlFreq
hardware, customisable SMS and voice calls are achievable
Device heartbeat monitor
Never miss a beat, if the device goes down, the right people know, instantly
Network redundancy
Multi-network 4G-IoT connectivity, constantly monitored for uninterrupted operation
Remote system management
Live status, event logs, alarm responses, faults and mains loss
Seamless integration
Compatible with all existing alarm panels and security infrastructure.
White-label branding
Branded for your company, delivered to clients as your service, supported by ControlFreq
Trade and reseller opportunities for MRR
Offer WebAlarm as a service to end customers and generate repeat revenue –with custom-branded marketing literature and technical support from ControlFreq
For businesses seeking a cost-effective alternative to the traditional ARC services or back-up for third-party alarm monitoring, WebAlarm provides a scalable, customisable solution to ensure uninterrupted safety, security and compliance
Fire and security alarm monitoring for maximum protection
ControlFreq’s fire and security alarm monitoring solutions provide real-time, reliable signalling, eliminating reliance on soon-to-be discontinued landlines and 3G networks.
Fire alarm monitoring
Ensure instant alerts for activations and faults – by SMS, pre-recorded voice call, email and WebAlarm – enabling faster response to fire risk, reducing downtime, and ensuring compliance with safety regulations
Security alarm monitoring
Delivers real-time notifications for breaches, faults, and power failures, ensuring businesses, staff, and assets remain protected 24/7
WebAlarm Cloud monitoring
WebAlarm integrates with ControlFreq or third-party hardware –supporting SIA-DC09 or Contact-ID protocol – offering features such as real time event logs of live alarm activity, instant notification of faults, mains loss or connectivity issues, and custom-branded interface to deliver a value-add service
To tighten their security further,
businesses can upgrade to the latest 4G monitoring hardware and gain cloud visibility of device status and alarm activity at the same time
Early fire risk detection for high-risk areas
ControlFreq’s thermal
CCTV monitoring provides real-time detection of heat anomalies, helping prevent fire hazards before they escalate
Continuously scanning for the slightest temperature changes, the system detects preset threshold breaches and sends instant alerts via SMS, voice call and email –as well as audible alerts to the cloud console – for early fire risk identification, reducing the chances of costly damage, operational downtime, and safety risks
It’s ideal for a range of high-risk environments, including:
EV chargers
Detects overheating and isolates mains power to prevent fire hazards.
Industrial sites
Monitors machinery and storage areas for potential fire risks
Warehouses and logistics hubs
Ensures fire prevention in stockholding areas
Data centres
Protects critical infrastructure from thermal-related failures
Public transport and airports
Enhances fire safety in high-traffic environments
With multi-network, 4G-IoT connectivity, the system ensures real-time monitoring with built-in connectivity checks. Cloud integration via API allows customisable solutions, ensuring compliance and realtime fire risk mitigation
GO WITH THE PRO
A Siemens fire detection system has been chosen to protect one of London’s most iconic venues as part of an extensive multi-million pound refurbishment programme. We learn more about the project.
The Roof Gardens, some 100 feet above Kensington High Street (hence the previous name of the Kensington Roof Gardens), is a 6,000 m2 venue on the roof of the former Derry & Toms building in central London
The decision to invest and restore the world-renowned site to its former glory included a need for a fire protection system which reflected the value of the Grade II listed building, including its rooftop gardens, designed by landscape architect Ralph Hancock back in the 1930s
Siemens Gold Solutions Partner, London Fire & Security, proposed a system based around Cerberus PRO, Siemens’ comprehensive EN54-13 approved fire alarm system, with the new ASD+ aspirating smoke detection for certain areas
Cerberus PRO features ASA detectors with their patented detection chamber design, dual optical sensing technology
and Advanced Signal Analysis (ASA) to optimise response It enables smoke detection in areas where thermal detection would ordinarily be necessary and provides reliable detection with no false alarms.
Combining old and new
Reflecting the importance of maintaining the surroundings and the club’s ambience for the Roof Gardens‘ members, in areas where conventional point detectors were deemed to impact on the aesthetics of a venue which combines old and new architecture, Siemens ASD+ was employed.
The venue’s art deco toilets are a good example The capability to conceal the air sampling pipework and just have small sampling holes visible enabled London Fire & Security to offer an unobtrusive option which still met all the performance requirements and necessary regulations
Siemens has offered ASD systems for a number of years but this new
generation – ASD+ – features two new detectors which are specifically designed to provide solutions for larger and more complex projects As such, a single device can cover an impressive area of up to 6,700 m2.
Even for Class A installations with the highest sensitivity requirements, up to 2,000 m2 of detection coverage is achievable with a single ASD+ detector This makes the technology ideally suited to applications typified by their large open areas, the roof gardens being a prime example, with the detectors located for ease of access.
The project featured the installation of ASA detectors, sounder beacons, call-points and ASD+ pipework and detectors, with the relevant interfaces, all monitored by Cerberus PRO panels to provide site-wide detection
Chris Saxby, Managing Director of London Fire & Security, commented: “As a company we always look to promote the
benefits of the ASA detection and its ability to provide fault-free fire alarms With our status as a Gold Partner, Siemens always provides us with excellent support, and
that was the case again with this project where we worked closely with the client to ensure we provided a solution which met the specific requirements of the site ”
Spectacular London views
The Roof Gardens originally opened in 1938 and became widely recognised as a roof top hub for celebrity parties following the transformation of its art deco tea pavilion into a nightclub in 1981
It’s known for its three beautifully themed gardens which include decadent fountains, ornate paths, outdoor heaters and flowing streams which are home to hundreds of fish, along with four resident flamingos
Following the extensive refurbishment under owner Stephen Fitzpatrick, the venue was reopened as a three-storey private members club in 2024 In addition to its spectacular views across London, the venue has four dining areas, several bars and lounges, entertainment spaces and elevated terracing
Marios Malone, Fire Systems Sales
Manager at Siemens, said: “For such a prestigious venue, the reputation that Siemens has globally as a fire systems solutions provider was certainly a factor in securing the contract
“Also important was the ASA detectors’ ability to detect real fires and avoid false alarms (and therefore unnecessary evacuations) given the focus on providing a relaxed atmosphere for the club’s members and their guests This is also reflected in the ongoing monitoring and maintenance of the system remotely
“As a cloud-based technology, Cerberus PRO enables many of the tasks that had traditionally been conducted on-site to be undertaken remotely, presenting opportunities for disturbance-free testing which doesn’t impact on the club’s day-to-day operations ”
TRUST-BUILDING EXERCISE
In this case study article we learn how the use of IDEAL Electrical equipment has helped provide the perfect security upgrade for the NHS Trust.
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The University Hospitals of North Midlands NHS Trust (UHNM) has two sites: Royal Stoke University Hospital in Stoke-on-Trent, and County Hospital in Stafford It is also home to Staffordshire Children’s Hospital at Royal Stoke
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KEY PROJECT FACTS
Customer: University Hospitals of North Midlands NHS Trust (UHNM)
Contractor: Layer One Installations
Solutions: Vista’s video surveillance products installed using the FT-45 Feed-Thru Modular Plugs and Crimp Tool from IDEAL Electrical
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Surveillance equipment to the rescue
The Trust was keen to ensure a safer environment for any employees working alone in potentially hazardous situations or remote locations, whilst also mitigating the risks associated with lone working, such as accidents, injuries and security incidents, and complying with regulations and standards regarding lone worker safety
At the same time, the Trust hoped to increase efficiency and productivity by encouraging lone workers to adhere to safety protocols
“ ... the use of the Modular Plugs and Crimp Tool was a no-brainer. A faster, more accurate install was achieved, with the new CCTV system up and running in no time.”
The Trust called upon its existing contractor, Layer One Installations, to assess the IT department’s security requirements
Headquartered in Manchester with a nationwide operation, Layer One Installations offers a wide range of services including structured cabling, fibre optics, CCTV systems, WiFi surveys, uninterruptible power supplies and intelligent security systems
Following the assessment, the decision was made to install a CCTV system designed to improve lone worker operating conditions in the central core IT rooms containing critical servers and IT equipment across five hospital sites, with the Trust keen to use an NDAA compliant solution
Marc Jones, Layer One Installations’ Director (pictured on first page and right), turned to his local specialist wholesaler to assist him in identifying the products needed to fulfil the Trust’s requirements, with the Vista VIP Series of NDAA compliant fixed dome cameras selected as the best fit across the five locations
Fast, simple and consistent terminations
Given the nature of the project, it was vital the job was completed quickly, without causing disruption to the hospitals and avoiding any costly delays
So, to enable fast and accurate installation of the CCTV equipment, Marc opted for a tried and tested favourite of Layer One Installations – the FT-45 Feed-Thru Modular Plugs and Crimp Tool from IDEAL Electrical
Used on data installations around the world, the FT-45 allows installers to speed up and simplify the termination of RJ45 plugs by eliminating the need to trim conductors to length first
The Modular Plugs feature open ends, enabling installers to feed the conductors completely through the connector before crimping With a clear connector design, the conductor order can be checked and adjustments easily made, if needed The
Crimp Tool is then used to trim and crimp the cable in one simple step
With five installation sites to complete, the ability to execute CAT5e, CAT6 and CAT6a cable terminations correctly the first time was key to the smooth and speedy running of the project
A job well done
Layer One Installations prides itself on high standards of installation, and the UHNM project delivered just that, thanks to the pre-existing relationship between the contractor and the Trust, as well as Layer
One Installations’ prior knowledge and experience of both the Vista range and the IDEAL Electrical FT-45 Feed-Thru system
Marc says: “The project was a success We evaluated the client’s requirements and proposed innovative solutions that would be straightforward to work with
“We knew from previous experience that we could rely on Vista and IDEAL Electrical to provide cost-effective, quality
solutions that would reliably do the job, without mistakes or delays
“We’ve been using IDEAL products for years, so when I knew the project required multiple terminations across numerous sites, the use of the Modular Plugs and Crimp Tool was a no-brainer A faster, more accurate install was achieved, with the new CCTV system up and running in no time ”
Through the implementation of the new video surveillance solution, the Trust’s IT department has met its objectives
The CCTV system has enabled realtime monitoring of lone workers, allowing for a quick response in emergencies or accidents, with the IT department now able to proactively identify and address potential safety hazards much more quickly and effectively
VISIT THE IDEAL FT-45 FEED-THRU MODULAR PLUG CRIMP TOOL PRODUCT
MAKE A U-TURN
g ( Construction Products) look into the benefits of getting to grips with the latest in fire clip technology.
Fire alarm systems, carbon monoxide detectors, and security cameras play a more essential role than ever in protecting lives and property these days
For electrical professionals, it’s vital to stay up-to-date on the latest regulations and technological innovations in these fields By doing so, you can provide solutions that are not only safe and efficient but also fully compliant with industry standards, ultimately safeguarding people and property alike
Staying current is critical to success In any industry, staying informed about legislative updates and best practices is essential to success. For those in the fire and security sectors, this means ensuring you have the systems in place to keep a handle on changing standards
Regulations like BS 6387:2013 and BS 5839-1:2017 in Ireland, which mandate the use of enhanced cables for critical safety systems, underscore the importance of this vigilance
These cables are specifically designed to withstand extreme temperatures, handle larger currents, and reduce the risk of failure over long distances This ensures fire alarm systems continue to operate reliably when every second counts
For electrical professionals, staying current on building codes and fire safety regulations isn't just about compliance, it's about providing the highest standards of
safety and reliability in every project
Product innovations in fire and security
One key innovation in fire safety is the new Red U-Clip 40, designed specifically for fire alarm and security systems by SPIT. This clip enhances installation efficiency and adds a crucial health and safety feature.
The vibrant red colour ensures quick visual identification within fire alarm systems, helping emergency responders in large or complex installations This visibility is invaluable during maintenance, repairs, and upgrades, minimising confusion in critical situations
The product also eliminates common issues such as cable snaring and the need for re-clipping, streamlining the installation process By reducing material waste and minimising delays, contractors can work more efficiently, saving time and money Additionally, its thumb-friendly design allows easy bending of the metal clip tabs, enabling quick and secure cable placement with just the press of a thumb
Benefits of the Red U-Clip 40 include:
1 Health & Safety
The red colour enhances visibility, allowing for quick identification of fire and security systems in emergencies
2 Improved efficiency
By eliminating cable snags and the need for re-clipping, the clip accelerates
installations and reduces on-site time
3 Reliability
Secure cable management reduces the risk of faults, ensuring consistent system performance.
4. Cost savings
The Red U-Clip 40 minimises material wastage and installation time, helping contractors save both time and money, and boosting project profitability
5 Long-term compliance
Meets the highest safety standards for fire alarm and security systems, ensuring compliance with current regulations and building codes.
Safety and efficiency are key
The fire and security sectors are essential for safeguarding buildings and their occupants Embracing innovative products like SPIT’s Red U-Clip 40 can significantly enhance both safety and efficiency in installations By utilising products that streamline installations, reduce material waste, and improve system reliability, contractors can stay ahead of the competition while delivering safer, more efficient solutions to their clients
SECURITY GUARDS
Are you thinking about adding smart security and detection to your solutions setup? Ben Pratt, the founder of B Electrical, with the help of Shelly devices, offers some tips to help you get started.
The security market has evolved significantly, yet finding products that integrate smoothly with a smart home or office remains a challenge As a specialist in electrical, automation, and security installations, I’ve often struggled to find a single brand that does it all – without exceeding my customers’ budgets
That’s why Shelly is my go-to choice Its solutions are compact, reliable, and easy to install, making them ideal for both new and existing security setups Plus, they run on your existing WiFi, eliminating the need for complex, costly hubs.
Keeping a property secure with Shelly alarms
Security starts with awareness, and Shelly’s alarm solutions are designed to keep you informed in real time I regularly install Shelly’s door/window sensors for clients who want to monitor entry points, as these tiny, discreet sensors send instant notifications if a door or window is opened when it shouldn’t be.
For added protection, Shelly’s motion
sensors detect movement inside your property These can be linked to automation rules – triggering lights, sounding alarms, or sending alerts to a phone Whether customers are asleep at home or away on vacation, they’ll know exactly what’s happening.
Shelly’s in-App alarm system is brilliant The range of notifications is extensive – push notifications, sirens, email alerts, text messages, and even Apple Watch alerts – ensuring customers are immediately aware of any security breach This real-time response not only deters unwanted guests but also allows for swift action.
Smart control for gates, garage doors and shutters
Automating entry points isn’t just about convenience, it’s about security too With Shelly, I’ve helped customers take control of their garages, gates, and roller shutters through smart automation
Motorised gates
By setting up a Shelly relay in ‘button mode’ with a 0.5-second auto-off, you can easily control motorised gates It works through the Shelly App and even integrates with Apple CarPlay, so you can open, stop, and close a gate without
needing a remote This is perfect for older systems that don’t have built-in smart control.
Garage doors
The Shelly Mini 1 (a compact yet powerful 8 A smart relay) fits neatly into the garage door motor housing Paired with the door/window sensor, you can schedule it to check the door’s status, ensuring it closes if left open If the garage is accessed outside of set hours, an audible alarm can be triggered. For added security, you can swap it out for a Shelly 2PM relay (16 A, 2-channel) to also activate an external siren or even raise a bollard to prevent vehicle theft
Shelly motion sensors for automated access
Motion sensors can be set to trigger doors, gates, or shutters based on movement. With scheduling and geofencing, you can automate access based on who’s arriving at the property and at what time
Preventative maintenance and appliance safety
Security isn’t just about deterring intruders; Shelly also protects against leaks, appliance malfunctions, and electrical hazards.
Leak detection
The Shelly flood sensor alerts individuals instantly when a leak is detected Paired with Shelly relays, it can shut off the main water supply and any electrical appliances in proximity to prevent damage
Equipment malfunctions
Use the power metering Shelly relays to immediately detect energy inefficiencies and potential hazards early, preventing costly repairs or downtime
Power monitoring and emergency response
One of the most overlooked aspects of security is power monitoring. A power failure can knock out security systems, elevators, and even access controls. That’s where the Shelly EM comes in.
Shelly EM for power failures
I install Shelly EM devices in most of my installations to monitor critical circuits, especially for clients with elevators or secured buildings If a power failure is detected, they can trigger automation rules like unlocking emergency exits or stairwells for safety
Fire alarm integration
Many Shelly relays can take inputs from fire alarms, allowing you to automate responses If a fire alarm is triggered, you can set doors to unlock, shutters to open for ventilation, or lights to turn on, guiding people to safety
Advanced security with scripting and permissions
For businesses, I’ve set up Shelly systems that go beyond basic automation By using scripts and integrations, you can log access events and set different permissions for staff, guests, and cleaners. Whether it’s giving temporary access to a contractor or ensuring only those who are authorised can open a certain door, Shelly makes it all possible
GET MORE DETAILS ON THE SHELLY RANGE OF DEVICES, AVAILABLE FROM NETXL, BY SCANNING THE QR
SAFE ISOLATION IS KEY! C
-TEC has launched an innovative range of ultra-safe fire alarm mains isolator key switches.
Designed for use on all types and makes of fire alarm system, the BF326 series allows the mains to a fire panel to be switched on/off as per the requirements of BS 5839-1
Available in red or white in flush or surface and with or without an LED Indicator, they’re ideal to keep your engineers safe during routine test and maintenance
Supplied with a plastic key and plastic key switch mechanism to reduce the risk of electric shocks, they have no exposed metal or conductive parts so no earthing is required
Fitted with a 5 A high rupture capacity fast blow fuse, they feature a mechanically linked double pole switch to prevent the risk of contacts welding together and false isolated readings on LED variants
Brian Foster, C-TEC’s UK Sales Manager, said: “Our new fire alarm mains isolator key switches are robust, reliable and very versatile As with all our products, they’re manufactured here in the UK at our multiple third-party certified facility to the highest quality standards
“For additional assurance, all variants have been independently tested to the prime insulation and isolation requirements of IEC/EN 60669. They also have an optional branding label that allows them to be used on evacuation alert and emergency voice communication systems too ” WATCH A SUPPORTING PRODUCT VIDEO AT: WWW.RDR.LINK/EBM030
BROWSE THE C-TEC RANGE OF ISOLATOR KEY SWITCHES AT: WWW.RDR.LINK/EBM031
HOOD INTENTIONS
Amit Ravat, MD of Lithe Audio which produces fire and acoustic hoods for ceiling speakers, discusses some of the key criteria installers need to be aware of to ensure installed audio systems are fire safe.
Meeting UK building regulations is a fundamental aspect of any ceiling speaker installation, as these regulations ensure that audio systems are safe, reliable, and efficient This includes ensuring fire resistance, energy efficiency, structural integrity, and acoustic performance
By adhering to these standards, installations not only provide quality sound but also contribute to overall building safety and sustainability
Unparalleled protection
Fire and acoustic hoods play a crucial role in ensuring the safety and effectiveness of ceiling speaker installations These hoods provide a protective barrier that helps maintain the fire resistance of ceilings, which is essential in adhering to UK building regulations
By containing potential fire hazards within the speaker enclosure, they limit the spread of flames, offering critical time for evacuation and emergency response
Additionally, acoustic hoods enhance sound quality by minimising sound leakage and improving acoustics within a room. This results in a more immersive audio experience without compromising safety
Brands like Lithe Audio set the standard for safety and performance in-ceiling speaker installations by offering fire and acoustic hoods
These essential components are meticulously designed to meet the stringent UK building and electrical
regulations, providing unparalleled protection and peace of mind.
They’re designed with compliance in mind, incorporating features that preserve fire resistance for up to 90 minutes and are compliant with Parts B, L, C, and E regulations
Comprehensive instructions
With products like Lithe Audio ceiling speakers, electricians can now install ceiling speakers as they would install a downlight. Power is added from any permanent live feed through the included power driver also designed to be used in ceilings
They come with detailed installation guidelines and video guides, ensuring that electricians can achieve flawless setups, and providing step-by-step guidance to guarantee that the speakers are fitted correctly and safely
The guidelines cover all aspects of installation, from wiring and positioning to securing the fire and acoustic hoods By following these instructions, users can ensure that the installations meet necessary electrical compliance and safety standards
This thorough approach not only facilitates a smooth installation but also optimises the audio system's performance, ensuring clear and immersive sound quality.
For the many other different types of audio installation within a home, our advice to electricians would be:
1. Familiarise yourself with relevant regulations and standards
BS 7671 compliance
Ensure all electrical work complies with
the latest edition of BS 7671 (IET Wiring Regulations), which outlines the standards for electrical installations in the UK This includes requirements for safe earthing, protective devices, and cable sizing
Audio-specific standards
Be aware of standards specific to audio installations, such as those set by the Audio Engineering Society (AES) and
British Standards (BS) These standards offer guidance on signal integrity, grounding, and shielding techniques to prevent interference
2. Conduct a comprehensive site survey
Assess existing electrical infrastructure
Inspect the site’s existing electrical infrastructure to determine if it meets the requirements for the new audio installation Check for issues like outdated wiring, insufficient circuit capacity, or improper grounding
Identify potential hazards
Look for any potential electrical hazards, such as exposed wiring, faulty outlets, or moisture-prone areas Address these issues before proceeding with the installation
3. Design for electrical and audio performance
Dedicated circuits for audio equipment
Use dedicated circuits for audio equipment to prevent electrical noise and interference from other devices. Ensure
these circuits are appropriately rated and installed with residual current devices (RCDs) to provide additional protection
Proper earthing and grounding
Implement a robust grounding scheme to prevent electrical shocks and minimise hum and noise Ensure all audio equipment is connected to a common ground, and avoid ground loops by using star grounding techniques
Correct cable selection
Choose cables that meet both the electrical and audio requirements of the installation. Use high-quality, shielded cables to prevent interference, and ensure cables are rated for the current they will carry
4. Implement safe and effective cable management
Secure cable routing
Route cables away from high-power electrical lines to avoid interference Use trunking or conduit to protect cables from
physical damage and ensure compliance with fire safety regulations
Minimise cable lengths
Keep cable lengths as short as possible to reduce resistance and minimise signal loss. Proper cable management also helps prevent tripping hazards and accidental disconnections
5. Install surge protection and power conditioning
Use surge protectors
Install surge protection devices to safeguard sensitive audio equipment from voltage spikes and surges. Consider whole-house surge protection for comprehensive safety
Power conditioners for clean power
Employ power conditioners to provide stable and clean power to audio equipment, reducing the risk of damage from electrical noise and ensuring consistent performance
6. Use quality equipment and materials
Certified components
U
Opting for Lithe Audio ceiling speakers provides peace of mind. Each speaker is designed with meticulous attention to compliance with UK building regulations, ensuring safety and reliability in any installation
T h e i n c o r p o r a t i o n o f f i r e a n d
a c o u s t i c h o o d s f u r t h e r e n h a n c e s
s a f e t y b y p r e v e n t i n g t h e s p r e a d o f
f i r e a n d o p t i m i s i n g s o u n d q u a l i t y
W i t h m u l t i p l e p r o d u c t s t o s u i t
d i f f e r e n t e n v i r o n m e n t s a n d r o b u s t
q u a l i t y c e r t i f i c a t i o n s , t h e s e s p e a k e r s
a r e b u i l t t o w i t h s t a n d d i v e r s e
e n v i r o n m e n t a l c o n d i t i o n s , m a k i n g
t h e m a d u r a b l e c h o i c e f o r a n y s p a c e
GET MORE DETAILS ABOUT LITHE AUDIO’S RANGE OF CEILING SPEAKERS BY VISITING:
WIN £250 TO SPEND ON DIMMERS! WIN
To celebrate a website refresh and multiple product updates, Enkin is giving away a £250 product voucher.
Enkin is an award-winning British electrical brand which designs and manufactures innovative dimming products Enkin’s team of electrical experts and product developers offer over 60 years combined experience in the trade, creating safe and reliable dimming technology.
The company was founded in 2021 to meet an increasing demand for reliable, high performing dimming products, amid a growing consumer interest in ambient mood lighting and complex lighting installations
Enkin’s high-quality dimming modules stop common compatibility issues such as flickering and buzzing Their sophisticated tech is silent and smooth, with an easy push button setup for seamless installation and soft-start technology to prolong the life of bulbs
Co-founder Joshua Hammerton worked as an electrician on complex lighting projects for 14 years and understands first-hand how challenging and frustrating lighting can be, with dimmers that buzz, flicker and drop out
Key features of Enkin dimming modules include: push button technology for easy setup in 15 seconds, compatibility with all leading lighting brands, advanced safety features, switchable driving modes alternating between leading and trailing edge and reduced housing size, compatible with most switch manufacturers
With lots to celebrate in 2025 – a website refresh, multiple product updates and a year packed with nationwide trade shows
Enkin is offering one lucky winner £250 to spend on any products on its website.
HOW TO ENTER
Deadline for entries: 10/05/2025 Usual T&Cs apply
Daniel Forsberg, Marketing Manager for EVSE at CTEK, addresses the need for smarter messaging to help boost smart EV charging.
THE MESSAGE IS CLEAR
According to a UK government commissioned study, what smart charging is and what it can do are still not widely understood
The report – Electric Vehicle smart charging: consumer research – recommends communicating how smart charging works and the benefits of individual lower electricity bills and the collective contribution to the nation’s grid management and greener energy
A group effort
The research behind the report, by the Energy Saving Trust, examined the current evidence base and interviewed 30 current and prospective EV drivers and fleet managers before six focus groups explored what the best messaging could be
The Trust defines smart charging as charging EVs when electricity demand is lower or when there is more supply than demand Smart charging can be achieved by pre-setting an EV to charge overnight, for instance, or with the time of charging controlled by an App or by ceding control to the energy provider.
The study found existing EV owners who charge at home had the best understanding of smart charging, with research suggesting 70-90% already smart charge – mostly by using cheaper overnight charging
Smart charging was much less prevalent at the workplace, with just 12% of EV drivers who charge at work able to
schedule their own charging
Fleet managers were found to be struggling to see how smart charging might work and be beneficial for their organisations. They’re currently focussed on transitioning their fleets to electric and not on optimising how they’re charged.
When the researchers asked their subjects if they understood the various types of electricity tariffs offered by suppliers and how they might enable smart charging, there were mixed results
Time of use tariffs, sometimes known in the UK as ‘Economy 7’, had good awareness and understanding, including the benefits of cheaper charging.
Dynamic tariffs, where the electricity price varies based on grid-wide supply and demand, didn’t have as high awareness
Type of use tariffs, with cheaper electricity for defined uses such as EV charging, were easily understood That said, environmental benefits are less likely with these tariffs
It’s encouraging that participants in the study were positive about smart charging and consider it worthwhile They can grasp the benefits of paying less for charging whilst helping the nation towards its environmental goals by making the most of renewably sourced energy at times when supply is higher than demand
When the researchers asked their focus groups to evaluate smart charging
messaging, and each group sought to improve on what their peers had previously refined in earlier meetings, ‘how it works’ was found to be an essential starting point.
Clear
communication
Explaining different tariffs was found to help, whilst messages about cost savings were motivational Communicating the savings from smart charging versus dumb was more effective than not, while combining cost saving and environmental benefits was a “win-win”
The report concludes: ‘The main misconceptions around smart charging stemmed from lack of understanding of the principles and technology, leading participants to worry about the effort involved and the reliability of smart charging As such, messages highlighting ease and convenience were well received ’
That is a challenge and an opportunity for all of us in the EV ecosystem, including smart-enabled chargepoint manufacturers such as CTEK, to communicate coherently, whenever we can, what smart charging is and its clear and achievable benefits
THE CHANGING FACE OF CLAMP METERS
Julian Grant, General Manager at Chauvin Arnoux UK, gives a potted history on the evolution of the clamp meter from its Bakelite clad beginning to the ultra-flexible sensors of today.
In 1937, Chauvin Arnoux invented the Transformer Clamp, which was the first current clamp to utilise the ‘split core hinged jaw’ system that we see in nearly all clamp meters today
When connected to an appropriate external ammeter, this enabled the AC current flowing in any cable or busbar to be measured quickly and non-intrusively for the first time
Not surprisingly, the transformer clamp and ammeter were soon combined to produce a stand-alone clamp meter, often referred to back then as a ‘tong tester’, with the current directly readable on an analogue display.
Novelly, to hold a reading on the display a slider on the back of the clamp meter could be pushed, which literally clamped the display needle in whatever position it was pointing The operator could then remove the clamp, note the reading, and release the needle
Over the decades clamp meters have
evolved to include digital displays, hall effect sensors for DC measurement, and often include a range of typical multimeter functions such as the measurement of voltage and resistance
More recent developments can also calculate and display other more complex functions such as power, power factor, and harmonics.
Throughout the decades of evolution, they have all continued to use hinged iron core clamps That was until recently
Introducing the Rogowski coil
Originally invented in 1912 by German physicist Walter Rogowski, a Rogowski coil consists of a helical coil of wire
The first transformer clamp invented by Chauvin Arnoux in 1937
Rogowski coil with integrator circuit
The first analogue and digital clamp meters from Chauvin Arnoux
PRODUCTS & BUSINESS SOLUTIONS
contained in a flexible sheath There is no iron core
Unlike a traditional current transformer, a voltage is induced in the Rogowski coil, which is proportional to the rate of change of current in the conductor that it surrounds. The voltage output from the Rogowski coil is passed through an integrator circuit, which converts it to provide a current output proportional to that in the conductor
Counter-acting
A derivative of the original coil, sometimes referred to as a counter-wound Rogowski, employs a method where the wire from one end returns through the centre of the coil to the other end such that both connections to the coil are made at one end Being now both open-ended and flexible, the Rogowski coil can be looped around a live conductor without disconnecting or disturbing it
Originally somewhat cumbersome devices that could be affected by nearby electrical noise, in more recent years Rogowski coils have reduced in size and increased in performance. Offering much improved immunity to external fields, they are now the current sensor of choice for many test instruments
Compared to a conventional clamp, they are slim, lightweight and bendable, allowing the sensor to loop around conductors in cramped, hard-to-reach
spaces or where multiple cables are closely bundled together
In contrast, an iron-core clamp meter requires enough space to fit its rigid jaws around the conductor while ensuring they are closed properly Any gap or misalignment in the jaws would result in potentially significant reading errors
Broader current ranges
Flexible clamps can often accommodate much larger conductor diameters than conventional clamps and can measure a broader range of current – particularly very high currents – where iron-core clamp meters may saturate or become less accurate This makes them ideal for measuring currents in large cables or busbars found in industrial and high-power installations
“ ... in more recent years Rogowski coils have reduced in size and increased in performance.”
They are also, however, entirely suitable for looping round much smaller cables, such as those found in domestic and light commercial installations, and in this scenario, could be looped around a cable several times to multiply the current reading and improve the Rogowski coils’ bottom-end measurement capability Ro g o w s k i c o i l s
Currents with frequencies of up to 5 kHz could be being generated, representing the 100th harmonic in a 50 Hz supply, and this is well within the measurement bandwidth of a Rogowski coil So many of the conventional clamps in use and available today can only measure currents with frequencies up to 400 or 500 Hz, which will under-report (read low) if higher frequency harmonics are present.
Flexible future
The absence of a heavy iron core makes flexible clamps more portable and easier to carry for field engineers or technicians, and their flexibility further enhances safety in difficult or hazardous environments Flexible clamps also tend to be more resistant to mechanical damage since they don't have rigid moving parts, like the jaws in a conventional clamp meter
In fact, the only real downsides to a flexible clamp when compared to a rigid iron jaw clamp is that they are not great at very low current measurements, bottoming out at about 100 mA Multiple wraps around the conductor being measured can reduce this, however Perhaps more crucially, they also can’t measure DC current.
For everything else, perhaps it’s time to ask yourself why you would ever need to use a conventional clamp again
Counter wound Rogowski coil
Chauvin Arnoux MA400D flexible clamp meter
TEMPORARY MEASURES
Do you understand the need for Temporary Works training in the electrical industry? Here the team at Pragmatic Consulting look at why it could be a very valuable investment.
Temporary Works (TW) refers to essential structures and equipment used during the construction, maintenance, or demolition of a project
Common examples include scaffolding, formwork for concrete, excavation supports, and access scaffolding.
TW may also be used for site setup (e g hoardings, access roads, etc ) and safety measures like guardrails and floor opening covers Specialised sectors, such as tunneling, marine, power transmission, and rail, also rely on TW for specific needs
The importance of managing Temporary Works
A significant portion of a project's cost can often be attributed to TW While minimising TW can be desirable, in most projects, it is essential and unavoidable
Effective management of TW is critical to reducing safety and commercial risks, which can arise at various stages, from design and erection to inspection and dismantling.
The Health and Safety Executive (HSE) highlights the importance of managing TW Although there’s no legal requirement to follow British Standard 5975, the standard offers a widely recognised best practice approach to TW management, particularly for medium and large projects
The key role in this process is the
Temporary Works Co-ordinator (TWC), whose responsibility is to ensure TW is carried out safely and without posing risks to workers or the public
Key roles in Temporary Works: TWC and TWS
Industry best practice has long emphasised the need for formal procedures to manage TW
The roles of the Temporary Works Co-ordinator (TWC) and Temporary Works Supervisor (TWS), first introduced in 1975 and 2008 respectively, are now integral to effective TW management These roles are essential to what is known as the Procedural Control of Temporary Works, as outlined in BS5975-1:2024.
The TWC, typically a senior managerial role, is responsible for ensuring all relevant procedures are followed throughout the project’s lifecycle, from design to completion
This includes ensuring designs are appropriately checked and that as-built TW structures conform to the agreed specifications. While the TWC may not always be site-based, they must ensure a competent TWS is on-site to manage day-to-day operations
The TWS, often a site engineer or supervisor, plays a hands-on role in inspecting and overseeing TW to ensure compliance with the design There must always be a TWC or TWS present on-site whenever TW is in use,
and both roles carry significant responsibility, requiring formal appointments by the contractor
Training and certification
The CITB’s courses for TWC and TWS, initiated in collaboration with the Temporary Works Forum (TWf ) about a decade ago, are now a staple within the construction industry
Course updates in 2023 were developed with input from HSE and industry experts, and for many contractors, successful completion of these courses is mandatory before being considered for either role
The courses focus on the Procedural Control of TW rather than the technical aspects, with core principles including CITB’s 3Ps (People, Process, Product) and 4Cs (Communication, Co-ordination, Co-operation, Competence) emphasised throughout the curriculum These principles are critical in ensuring the safe management of TW
Although passing the final exam is a key requirement for certification, it does not in itself confer competency. Competency is determined by the employing company, and delegates must also have practical experience
Courses are enriched with real-world examples provided by trainers with decades of experience, ensuring that delegates leave with a clear understanding of how to manage TW in practice and on-site
The role of the trainer
At Chris Bennion Consultancy, our trainer brings over 45 years of experience in all aspects of TW, having worked as a TW Designer, Design Checker, Engineering Manager, and TWC across various sectors of the construction industry. As a member of the TWf and co-author of the TWf ’s Sample Procedure TWf2019.03, which is recognised by both HSE and CITB, our trainer is uniquely positioned to provide delegates with valuable insights and practical knowledge
Essential for managing risks
CITB’s Temporary Works courses are essential for ensuring that those in the roles of TWC and TWS are equipped to manage the inherent risks of TW in construction With certification valid for five years and a mandatory refresher course (TWCTC-R) required to maintain qualification, the industry continues to prioritise the safe and efficient management of TW
The CITB’s Site Safety Plus suite of training courses includes three key programs designed to improve the management of Temporary Works on construction sites:
● Two-day Temporary Works Co-ordinator Training Course (TWCTC)
● One-day Temporary Works Supervisor Training Course (TWSTC)
● One-day Temporary Works Co-ordinator Refresher Training Course (TWCTC-R)
The electric vehicle revolution is gaining momentum, resulting in a surge in demand for home charging solutions Research by Lloyds Banking Group indicates that more than half of homes in the UK already have the infrastructure for domestic charger installation, and with data from Statista showing that new EV registrations are growing by around 20% each year, there is significant ongoing demand to address
To succeed in this market, electricians must educate themselves on what motivates customers to opt for domestic chargers, the key selling points that resonate with different client profiles, and the opportunities for upselling and cross-selling accessories, upgrades and related products to maximise profitability
Addressing concerns can reassure potential customers
One concern for homeowners is the capacity of their existing electrical system Indeed, a frequent question we receive is whether their current setup can handle the
MAKE YOURSELF AT HOME
Simon Humphries, Retail Business Director at Humax EV Charging, advises on how to grow your business by educating customers on the benefits of domestic EV charger installations.
added load of an EV charger This presents an opportunity for electricians to offer an assessment service that can inform the specifications of the new charging system Requirements will vary, and can include circuit upgrades, panel upgrades and weatherproof exterior cabling
A necessary investment
Framing these upgrades not as an additional expense, but as a necessary investment for safe and efficient charging, is crucial for securing customer buy-in for example, by reinforcing the benefits in terms of the overall electrical safety and capacity of the home
For complex projects that may require additional electrical installations or upgrades and interruptions to the power supply, providing a detailed overview of the process, along with a realistic timeline, is important in reassuring the customer
Clarity on cost-savings helps EV owners make the switch
Return on investment (ROI) is a critical factor in any significant purchasing
decision, which means electricians need to clearly articulate the financial advantages of home charging to their customers, both short and long-term
Highlighting the cost savings compared to public charging networks (which can be up to 10 times more expensive per kWh according to Which?), coupled with the convenience and control of charging at home, helps to strengthen the case for domestic charger installation
There are also government incentives available, such as the OZEV grant, which can reduce the total cost to the homeowner
To take advantage of this, electricians should register as authorised installers online via the GOV.UK website a straightforward process requiring basic business details alongside a Competent Person Scheme (CPS) name and number or ECA membership
Most EV owners are responsive to long-term benefits
As well as the immediate incentives, long-term benefits are important selling
points for home EV charging solutions.
Electricians should familiarise themselves with the key features of modern chargers, such as scheduled charging to take advantage of off-peak tariffs, remote control and monitoring via smartphone Apps, as well as integrated energy consumption tracking Positioning these features as tools for optimising energy usage and reducing costs resonates well with environmentally and financially conscious consumers
Offering a suite of complementary services can allow electricians to increase total project value, while building their brand as a comprehensive solutions provider. Services such as home energy audits to identify potential energy efficiency improvements, smart home integration to connect the EV charger with other devices, or solar PV installation to generate low-cost, clean energy, are increasingly popular
A proactive approach is the key to success
With domestic EV charging technologies evolving quickly, and ownership growing year-on-year, electricians must take a proactive approach to secure market share and future-proof their businesses That means effectively addressing customer concerns, educating customers on the benefits of home charging and showcasing the latest solutions.
Those professionals who can establish themselves as trusted experts in the field and widen their service offering to incorporate associated solutions such as smart home design and renewable energy will find it easiest to build profitable long-term customer relationships
Humax chargers
Founded in 1989, Humax is a total mobility solutions and services provider offering an extensive portfolio of advanced technologies including EV charging solutions for domestic and commercial use Compatible with all EV types, Humax home chargers come with a tethered Type 2 cable, providing seamless charging for both EVs and PHEVs They also benefit from a host of features such as PEN fault protection, wall mount and pole stand options, Wi-Fi and Ethernet enabled and OZEV approval
David Sweetman, Group Marketing & Business Development Director for
the Di-LOG Group, takes a deeper dive into the next generation of testing solutions which are powering solar PV installations.
As the global demand for renewable energy grows, solar power remains at the forefront of sustainable solutions. In the UK, the adoption of solar photovoltaic (PV) technology is rapidly increasing, with both residential and commercial sectors embracing solar installations as an essential step towards reducing carbon footprints and achieving energy independence
To support the growing solar market, Di-LOG, a leading provider of innovative test and measurement solutions, has launched the next generation of solar PV test kits: the SL350 Professional Plus and the SL520 Expert
These advanced kits are designed to help solar installers and technicians efficiently and accurately install, test, and maintain solar PV systems, ensuring optimal performance for residential, commercial, and industrial installations.
A snapshot of the solar PV market
The UK solar energy market has seen significant growth over the past decade
According to recent statistics, there are now over one million solar installations across the UK, with a combined capacity of over 13 gigawatts (GW)
This number continues to climb, with
CATCH SOME SUN
both domestic and commercial installations contributing to the nation’s renewable energy targets.
The UK government has set ambitious goals to achieve net-zero emissions by 2050, and solar power plays a crucial role in this journey
In the domestic sector, solar installations have become increasingly popular, particularly among homeowners seeking to reduce energy bills and carbon footprints By the end of 2024, experts predict that the number of solar installations on domestic rooftops could exceed 2 million
Meanwhile, the commercial sector is also seeing robust growth, with ng an integral part sustainability s With ements in solar technology, including battery storage solutions, businesses are opting for largescale solar systems to power operations, reduce energy
costs, and meet green energy requirements.
The SL350 Professional Plus
The Di-LOG SL350 Professional Plus Solar PV Test Kit is designed to meet the demanding needs of solar professionals, offering a powerful combination of precision and ease of use
This comprehensive kit is equipped with a variety of tools that help solar installers assess system performance and troubleshoot any issues.
At the heart of the SL350 kit is the SL104 Solar Irradiance Survey Tool This versatile device is capable of measuring both solar irradiance and temperature –two critical factors that determine the efficiency of a solar PV system The tool includes both internal and external probes, which allow users to measure the temperature of PV panels and cells, ensuring that the system is operating within optimal thermal conditions.
Additionally, the SL104 features a compass inclinometer that helps users assess roof pitch angles and array orientations on-site This tool is essential for ensuring that installations align with industry standards such as IEC 62446-1, which governs the performance and testing of solar PV systems
The SL350 kit also includes the DL6414 TRMS 1000 A AC/DC Clamp Meter, a highperformance tool for measuring a range of electrical parameters, including voltage measurements up to 1,000 V AC/DC The clamp meter is ideal for testing large domestic and medium to large-sized commercial PV systems, as it is capable of measuring high open-circuit voltage (VOC), which is often required for highefficiency solar installations
With advanced features like Inrush Current Measurement, Low Impedance (LoZ) Testing, and the ability to measure Variable Frequency Drive (VFD) systems, the DL6414 provides a comprehensive set of capabilities for both solar and industrial applications, enabling technicians to complete their jobs efficiently and accurately
The SL520 Expert
For professionals seeking the highest level of performance and precision, the SL520 Expert Solar PV Test Kit represents the pinnacle of testing equipment
While the SL520 shares many of the same features as the SL350, including the SL104 Solar Irradiance Survey Tool, it steps up the capabilities with the inclusion of the DL6508 TRMS 1500A AC/DC Clamp Meter with Power Measurement
This advanced clamp meter extends the current measurement range up to 1,500 A AC/DC, making it perfect for testing large-scale commercial and industrial PV installations that require higher capacity
The DL6508 features a 40,000-count backlit display for enhanced readability, even in low-light conditions, and can measure power (kVA/kW), power factor, and inrush current These additional features allow solar technicians to troubleshoot complex issues with greater efficiency, ensuring that systems are operating optimally
Another unique feature of the SL520 Expert kit is its focus on power measurement, which is critical for installers working on commercial solar systems Accurate power measurements can help identify inefficiencies and ensure
that solar systems are meeting performance expectations
With the ability to measure both AC and DC power, the SL520 Expert gives users the tools they need to perform comprehensive system diagnostics and provide clients with reliable performance data
Key features
Both the SL350 Professional Plus and the SL520 Expert Solar PV Test Kits come with a host of features designed to meet the specific needs of solar professionals:
Accurate solar irradiance and temperature measurement
The SL104 Solar Irradiance Survey Tool ensures precise measurements of solar irradiance and temperature, which are critical for assessing system performance and efficiency
Versatile compass inclinometer
The built-in inclinometer allows for accurate assessment of roof pitch angles and array orientations, helping technicians plan and execute installations with confidence
High voltage measurement capabilities
Both kits offer voltage measurement capabilities up to 1,000 V DC, making them suitable for large domestic and commercial systems
Impedance (LoZ – DL6414), Power Measurement (DL6508), and more
These tools are invaluable for troubleshooting, performance verification,
and system optimisation
Durability and reliability
Built to withstand the rigours of daily use, the Di-LOG test kits are robust and designed for professionals working in demanding environments, supporting a two-year warranty.
Streamlining workflows and improving efficiency
The growing demand for solar PV systems in both the domestic and commercial sectors places pressure on solar professionals to ensure installations are completed efficiently and safely
Di-LOG’s range of Solar PV Test Kits simplifies the testing and commissioning process, streamlining workflows and enhancing productivity.
Whether you’re installing solar systems on rooftops or troubleshooting complex commercial setups, the tools empower professionals to deliver exceptional results, reduce downtime, and improve system reliability
As the solar energy sector continues to expand, the importance of high-quality testing and measurement tools cannot be overstated. With the launch of the SL350 Professional Plus and SL520 Expert test kits, Di-LOG continues to support solar installers and technicians with the tools they need to succeed in a rapidly evolving industry
BROWSE DI-LOG’S RANGE OF SOLAR PV TEST KITS AT: WWW.RDR.LINK/EBM039
It’s by design as the eco lands for Evo Homes
National Ventilation has designed and supplied a whole-house ventilation system to an architect-built five-bedroom eco home in Carbis Bay, St Ives, Cornwall. Throughout the ventilation design and installation, the company worked closely with developer Evo Homes, who also benefitted from National Ventilation’s pre-install site visit, site support service, training, and technical support from start to finish
Whole-house solutions
Evo Homes, run by husband-and-wife team Mark Cope and Rachael Gaunt, has utilised whole-house ventilation with heat recovery by National Ventilation for the project which sits within a street of 16 energy-efficient homes for self-build and custom finish, on Menhyr Park in Carbis Bay.
The five-bedroom detached family home is being built for a private client and features a Vent-Axia Sentinel Kinetic High Flow mechanical ventilation with heat recovery (MVHR) unit, specified and supplied by National Ventilation, combined with an air source heat pump and solar panels to help achieve a comfortable EPC A-rated home.
Commenting on the relationship with National Ventilation, Mark, an experienced Site Foreman and Evo Homes Director, comments: “We’re very pleased with the technical support provided by National Ventilation, both in design and during construction.
“Units and components are readily available from local merchants and duct runs are easy to incorporate within the building fabric
“We’re now also at the design stage
for the next four homes at Menhyr Park and are fully committed to working with National Ventilation for our forthcoming projects.”
Rachael, an architect and fellow Director at Evo Homes, reflects on the changing landscape of sustainability and regulation in the UK, noting: “Modern homes need whole house ventilation systems to help keep internal environments fresh and healthy
“As the airtightness of building fabric increases and SAP targets become harder to achieve, we see the value in installing MVHR with heat recovery in all of our projects moving forward.
“We took advantage of the training provided by National Ventilation to help us install, commission and service the systems we offer ”
National Ventilation worked with Evo
“We took advantage of the training provided by National Ventilation to help us install, commission and service the systems we offer.”
Homes to design a system that would provide the right levels of ventilation and would physically work within the structure Being able to work with the architect and plan from the start made the ventilation design stage far easier and more efficient
National Ventilation specified the Sentinel Kinetic High Flow MVHR to provide highly efficient and effective ventilation to improve indoor air quality
Simplified installation
Low carbon and energy efficient, the Sentinel Kinetic High Flow MVHR is ideal for larger homes and offers a whole building heat recovery system combining supply and extract ventilation in one unit
Alongside this, radial ducting was
installed on the project, which offers simplified installation thanks to easy push-and-click fittings The ducting is also easy to hide within a building
Furthermore, the design incorporated acoustic lined manifold boxes with an inline attenuator, which National Ventilation specifies as standard, to minimise break-out noise
“Our free design service is available to anyone requiring assistance in designing ventilation systems and specifying the correct equipment,” explained Steve Daniels, Specification Manager at National Ventilation
“We work closely with architects and contractors throughout the design process Communication is key on a project – from the design service, to pre-order site visit, to commissioning It’s important that customers can feel free to ask us questions at any point of the project to help ensure the ventilation system operates as designed.”
As well as the system design, National Ventilation undertook a pre-order site visit to ensure that the design fitted the project on the ground, as well as on
paper This important visit checks that everything will fit as designed and joists are where they’re supposed to be
If the site doesn’t reflect the original plans the quotation can then be tweaked by National Ventilation before the system is delivered, meaning greater efficiency and less waste In addition, National Ventilation also offered Evo Homes training on how to set up and commission the MVHR unit
National Ventilation’s specification team offers the free whole-house ventilation design service for design and build projects
Aimed at architects, developers and builders with developments of 100 plots or less, the service provides a full whole-house ventilation design, which will detail unit calculations, a full kit list, recommended duct routes, as well as a pre-order site visit where necessary
GET MORE DETAILS ON NATIONAL VENTILATION’S FREE DESIGN SERVICE AT: WWW.RDR.LINK/EBM040
Circle shapes up nicely with digitised healthcare estate
With 53 hospitals and over 6,500 specialist consultants and doctors, Circle Health Group has made huge operational efficiency gains across its complex healthcare estate Thanks to its ongoing relationship with Schneider Electric, the Group has saved over £200k since 2018 and has solved 81% of maintenance tickets remotely
Perfect partners
Partnering with Schneider Electric in 2017, Circle Health Group started proceedings by rolling out energy management and building control solutions across its estate
As is the case for many healthcare providers, boosting operational efficiency whilst dealing with restricted budgets and workforce shortages was a major challenge for the estates team
With additional priorities such as decarbonisation, cybersecurity, and staff training, the Group decided to level up its partnership with Schneider by transitioning to a Connected Services Hub and introducing EcoStruxure Building Operation.
Circle Health Group now has access to a centralised overview of estate data and an advanced analytics platform with 24/7 remote maintenance support
Using over 500 AI-powered algorithms, the supplier-agnostic tool monitors alarms across critical equipment and systems to flag issues Schneider Electric has now
connected over 75% of the hospitals and is working on connecting another 15% by the end of April.
The digitisation of the estate is also supporting sustainability decision-making with detailed metrics across energy usage The hospitals can now adapt quickly and with a greater degree of control across heating, ventilation, air conditioning, and space utilisation to provide adjustments and reduce the environmental impact
"Times are tough for healthcare estate leaders," said Kas Mohammed, Schneider Electric’s Vice President of Digital Energy UK&I
Steven Buchan, Circle Health Group’s Director of Estates, said: "As a healthcare provider it’s critical we minimise downtime so as not to impact patient care The service plan we have in place with Schneider Electric is critical to this
“We’re able to gain invaluable insights into how the estate is performing and take swift action, either remotely or via on-site support, if an issue is detected
“This digitised, data-driven approach has streamlined our operations, bringing operational efficiencies whilst also giving us the information we need on our energy usage which supports our sustainability initiatives as we look to decarbonise our operations ”
"Circle Health Group is a shining example of how a digitised healthcare estate can reap massive efficiency rewards
“These results show how 24/7 remote support, and connected systems can bring hospital operations back to full health, save vital funds, and prevent downtime in such a critical environment "
ON
The ‘hole’ package from Integral LED
Integral LED, in partnership with installer Anytronics, has successfully transformed the atmosphere at The Putt Hutt, Clarence Pier, with state-of-the-art LED lighting.
The mini-golf course now boasts vibrant, dynamic lighting solutions that enhance the visitor experience Utilising Integral LED neon flex bendable strip with top bend, providing seamless RGB illumination for stunning visual effects and IP67 ingress protection to help simplify cleaning and
maintenance, the strip’s silicone extrusion allowed flexibility for the course’s curves, reducing the need for cutting and connections, resulting in quicker, easier installation and a cleaner end effect.
Bob from Anytronics said: “The end result has gone down so well After only previously seeing a 5-metre test section in
one area, The Putt Hutt couldn’t have imagined it would look this good The tape provided a perfectly homogenous display with cascading colours that were incredibly smooth.”
The project highlights Integral LED's ability to blend creativity with performance for unique, engaging spaces
Make outdoors great with instant warmth and maximum efficiency
As outdoor comfort becomes increasingly important, electrical installers play a crucial role in providing efficient and reliable heating solutions for both residential and commercial spaces
Whether it’s a garden patio, restaurant terrace, or any other outdoor setting, clients are seeking high-performance heating that is both easy to install and energy efficient
Rointe’s latest range of infrared heaters offers installers a cutting-edge solution that delivers instant heat, seamless integration, and long-lasting performance Designed with both efficiency and ease of installation in mind, these heaters ensure that professionals can meet the growing demand for smart, reliable outdoor heating solutions.
Advanced heating technology for maximum efficiency
Rointe’s outdoor heating range leverages short wave infrared technology, ensuring warmth is delivered directly to objects and bodies instead of wasting energy heating the surrounding air
With up to 95% thermal efficiency, the heaters provide instant heat in just three seconds, making them a practical and cost-effective solution for installers looking to offer their clients sustainable, high-performance heating
Sahara: wall-mounted infrared heater
Ideal for wall or ceiling installations, the Sahara heater features ultra-low glare soft lighting and a golden halogen lamp for a warm, inviting glow With a remote control for two heating levels, an adjustable tilt angle, and over 10,000 hours of lamp life, Sahara provides installers with a robust, long-lasting heating solution that’s easy to fit and maintain
Umbra
Mini: compact and versatile heating
The Umbra Mini is a versatile, parasol-mounted heater that can also be installed on walls or ceilings Featuring a low glare amber lamp, it delivers effective heating with reduced brightness for comfortable outdoor use. Safety is a top priority with overheating protection, ensuring peace of mind for both installers and end-users
Lyra & Lumia: ceiling-mounted elegance
For installers looking for discreet and efficient ceiling-mounted heating, the Lyra and Lumia models offer low glare halogen lamps and an interior aluminium reflector for enhanced heat distribution While Lyra comes with remote control operation, Lumia features a pull cable switch for straightforward functionality, making both options ideal for seamless, high-quality installations in a variety of settings
Fuji: portable 360°heating
For clients who need flexibility, the Fuji freestanding heater offers 360° heating with the latest carbon fibre lamp and built-in handle for easy mobility
Lightweight yet powerful, it features tip-over safety protection, ensuring secure and adaptable heating that meets the needs of both residential and commercial applications
Designed for installers
Rointe’s outdoor heaters feature long-lasting halogen lamps, reducing maintenance requirements and ensuring low energy consumption. With quick heat-up times and targeted warmth, installers can offer clients cost-effective heating solutions with minimal waste and maximum performance
UNICRIMP Conduit Accessories
Unicrimp has added a brand new collection of Conduit Accessories to its Q-Crimp portfolio The extensive range comprises more than 90 individual products in total, with key products including Conduit Boxes, Light Gauge Saddles, Inspection Tees, Inspection Bends, and Metal Hooks The range has been designed to offer essential solutions for ensuring the proper functioning, safety, and efficiency of electrical conduit systems The durability, ease of installation, and protective features of these accessories make them indispensable across electrical installations in residential, commercial, and industrial environments Unicrimp has produced a brochure to showcase the new Conduit Accessories range, which can be downloaded from the Unicrimp website and the Scolmore Group App
TAMLEX ZM Coated Steel Containment
Tamlex’s
Zinc-Magnesium (ZM) coated steel
containment offering is versatile and can be used across a variety of industries Zinc Magnesium (ZM) is a cutting-edge anti-corrosion coating that offers exceptional protection against corrosion and is a notable advancement over traditional Hot-Dip Galvanizing (HDG) The ZM coating comprises 93 5% zinc, aluminium (3 5%) and magnesium (3%) formulated to create a corrosion-resistant, self-healing protective layer Thanks to its 3% magnesium content, this protective layer is designed to withstand the harshest conditions, ensuring long-term performance, and making it a cost-effective solution Zinc
Magnesium cable management provides exceptional corrosion resistance, self-healing capabilities, lightweight design for easier handling, eco-friendly and sustainable properties and long-term cost efficiency Applications include data centres, marine and coastal areas, industrial facilities, renewable energy environments and key infrastructure
DOMUS VENTILATION
Recycled Plastic Ducting
Domus Ventilation is proud to announce that its leading ventilation ducting will now be manufactured primarily from recycled plastic The company already uses 100% recycalate on its rectangular ducting and over 95% of its fittings use 100% High Impact
Polystyrene (HIPS) which comes from post-consumer recycled plastic As part of the Genuit group, which has committed to have 62% of its ducting source material come from recycled plastics where at all feasible, Domus Ventilation has now progressed to manufacturing its entire ducting range primarily from recycled plastic This will make the ducting one of the lowest carbon choices on the market, without any detrimental impact on the quality of the product that Domus ducting is renowned for Domus Ventilation ducting is available as flat channel, round pipe, and Radial semi-rigid duct system and comes with a range of problem-solving accessories It’s been designed to work in harmony as part of a ventilation system and has been third-party tested for end-to-end system performance.
CED ELECTRICAL Axiom Detector Alarm Ranges
The Axiom brand boasts two ranges of smoke, heat and CO alarms, each with its own features and benefits, but both made with non-flammable ABS plastic and with CE, UKCA and RoHS approvals. First, a long-established quartet of detectors includes both battery (9 V lithium) and mains-operated photoelectric smoke detectors, plus mains inter-connectable heat and carbon monoxide detectors. Building on the continuing success of these products, a year ago a new modern range was launched – complete with up-to-date technology and a five-year warranty Here, both smoke and heat alarms include 10-year life lithium battery versions as well as mains power options with 9 V alkaline battery back-up Supplied with ceiling mounting brackets this RF range pairs seamlessly with each other and can link with up to 40 alarms. The CO alarm is a stand-alone sensor that can detect CO from any combustion source Powered by a 10-year lithium battery and supplied with a wall mount, this alarm features an LED indicator and test/hush button Finally, new to the Axiom range, is a wireless remote controller with test, silence and location functions, ideal for control of triggered smoke or heat alarms Fitted with a three-year replaceable Cr2450 battery, it is tamper-proof and simple to install
ROBUS
Outdoor Lighting Range
Transform extra spaces into meaningful places with ROBUS bollards, wall lights, ground lights and spike lights To help make selection easier, ROBUS has created an online guide to decorative and security lighting, including corrosion-resistant spike lights in both contemporary and classic styles, all designed for easy customisation with GU10 lamp compatibility The diverse wall light range offers directional lighting options to suit any preference, complete with trims to match any aesthetic For outdoor sheltered spaces or indoor kickboards, the marine-grade stainless steel ground light delivers both durability and a sleek design ROBUS is dedicated to hassle-free installations, which is why its bollards feature pre-flexed wiring and extra space to neatly conceal and hide junction boxes
Key features include:
● Die-cast outdoor luminaires are salt spray tested from 100 to 1,000 hours and coated in UV-stabilised paint.
● Bollards feature built-in pre-flex and additional space for discreet junction box concealment.
● Every new spike light is GU10 lamp compatible for ultimate customisability
● Create a holistic lighting aesthetic with matching sets available in various finishes
● All ROBUS luminaires come with a two-year on-site warranty.
LINIAN Cable Tray Clip
LINIAN, creators of the world s first single component fire rated clip, has unveiled its latest innovation for cable tray installations – the LINIAN Cable Tray Clip
This product is non corrosive, weather resistant and \manufactured in the UK, with benefits that include:
90% faster installation: forget about stainless steel cables ties and the ratcheting tool Using LINIAN Cable Tray Clips you can drastically reduce time spent on installations
Incredibly easy to install: it simply locks in by hand
Multiple sizes: with sizes ranging from 50 mm (light) to 225 mm (medium and heavy duty) it can be used with any brand of trays
The product represents a game-changer in cable tray installs and will deliver massive benefits on resource, time and cost savings, especially for large electrical and M&E contractors who lay hundreds of meters of trays
The LINIAN Cable Tray Clip is fully compliant with the 18th Edition Wiring Regulations (BS 7671:2018), meaning it is fire-rated and designed to prevent premature cable collapse during a fire
Like all LINIAN products, the new Cable Tray Clip uses recyclable packaging and ethically sourced materials Manufactured in Britain, it keeps the supply chain short, reducing carbon footprint.
Additionally, by replacing traditional stainless steel cable ties with a reusable clip, installers can significantly reduce waste on-site. It’s a win-win for the environment and the installer
AI assistant can Empower your business
In the fast paced world of the electrical sector, missed phone calls can lead to lost business
Indeed, studies show that 70% of calls to tradespeople go unanswered because they’re busy on a job, and potential customers will often call another tradesperson within minutes if they can’t get through This means electricians are not just missing a call, they’re losing business at the same time!
EmpowerAI can solve the issue
EmpowerAI is a cutting-edge AI assistant built specifically for sole traders and small businesses to make sure no lead is lost, even when they can’t pick up the phone
How it works
Instant AI response
As soon as a call is missed, the AI sends an immediate, personalised response to the customer before they move on to another business
Smart customer interaction
The AI tailors responses based on the specific services that particular business offers, answering questions, providing pricing information, and offering availability details.
Seamless booking and reminders
Customers can book an appointment on the spot, and the system can send reminders if required.
Multi-channel communication
It doesn’t stop at calls – EmpowerAI also responds to social media messages and website enquiries, ensuring tradespeople engage with every potential customer – even while they’re working
The inspiration behind EmpowerAI
Founder and creator, Bryan Himsworth, grew up watching his dad – a plumbing and heating engineer – struggle with the same issue of juggling work while trying not to miss out on business opportunities
He saw first-hand how frustrating it was
to lose business simply because his father was busy helping another customer
As such, Bryan wanted to create something that would allow electricians, plumbers, and other trade professionals to focus on their work while AI ensures they never miss a lead
Unlike expensive answering services, EmpowerAI is a cost-effective, intelligent solution that ensures sole traders and small businesses retain their leads, grow their business, and provide a great customer experience without hiring extra staff
How to get started
Do you want to try before you buy?
Electricians can easily sign up for a free trial/demo to see how AI can help them capture every opportunity and increase their bookings
GET MORE DETAILS ABOUT EMPOWERAI AND SIGN UP FOR A FREE TRIAL BY VISITING: WWW.RDR.LINK/EBM050
NETXL
Shelly Plus 2PM Relay
The Shelly Plus 2PM is a powerful 2-channel, 16 A smart relay switch that brings advanced automation and precise energy management to a home or business Whether you need to control lights, blinds, shutters, or appliances, this smart relay offers seamless remote access, accurate energy monitoring, and robust automation features to make life more convenient and efficient With dual-channel control, the Shelly Plus 2PM lets you manage two separate circuits independently, perfect for blinds, shutters and bi-directional motors. It also provides real-time and historical energy consumption data, helping you optimise usage and reduce electricity costs This level of power monitoring gives you greater control over energy expenses while promoting a more sustainable lifestyle Remote access and scheduling features allow users to control devices from anywhere using the Shelly App or through one of 200 integrations You can also set schedules for automatic operation, ensuring that lights, shutters, or appliances run exactly when needed For more advanced users, the Shelly Plus 2PM supports complex automation routines using Shelly’s scripting and scene functionalities, providing endless possibilities for customisation Designed to be compact and versatile, the Shelly Plus 2PM fits neatly behind standard switches and sockets, making it suitable for both residential and commercial installations.
LEDVANCE FLOODLIGHT
FLEX Range
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ATC
ELECTRICAL Cub Hand Dryer
The Cub Hand Dryer is a key member of the ATC energy-efficient hand dryer range Designed for compact spaces and areas of medium to low footfall, it delivers powerful drying performance. With its sleek and modern design, it offers a stylish yet practical solution for contemporary washrooms. Recent changes have added to the aesthetic of this hand dryer with ATC’s popular brushed stainless-steel model now in a uniform silver finish, while the white version offers a clean minimalistic appearance and the fully matte black finish delivers a premium look The switchable heating element offers energy savings by allowing a change between 1,300 W with heat for added comfort or 650 W without heat for low energy consumption. Installers of the Cub also benefit from its ease of mounting and installation The Cub is an extremely affordable hand dryer with an annual energy cost of approximately £110 When compared to paper towels, this is a cost saving of 90% or £1,137 per year With annual CO2 emissions at just 66 92 kg, it’s the more environmentally friendly option for today’s modern restrooms
E T M O R E P R O D U C T D E TA I L S AT: W W W. R D R . L I N K / E B M 0 5 3
Products round up
KNIPEX
Snipe Nose Side Cutting Pliers
The KNIPEX VDE-tested Snipe Nose Side Cutting Pliers (26 26 200) are designed for installation, assembly and cutting tasks – their long, slender tips give professionals all the control and safety required for working in tight spaces
These pliers are known as ‘stork beak’ pliers for a reason – forged and oil-hardened, they have very long, narrow, half round jaws with a 40º angle at the tip to get easily into awkward spaces The elastic precision tips are distortion-resistant and won’t buckle, even under strong twisting forces, making them ideal for gripping, inserting and cutting in confined spaces such as control cabinets, machines and junction boxes The induction hardened cutting edges are shaped for a pierced cut, making them highly efficient for both soft and hard wires The cutting-edge position near the joint improves force transmission, so you get an impressive cutting performance with minimal effort across different wire types (medium-hard wire up to Ø3 2 mm, hard wire up to Ø2 2 mm) The pliers are finished in chrome for corrosion resistance and have insulated, multi-component grips for comfortable handling They’re VDE tested so comply with safety standards for electrical work The pliers are also available as part of KNIPEX’s Tethered Tools range (model 26 26 200 T), which means it’s also ideal when working at height.
CLICK SCOLMORE
Metal Clad Pro Wiring Accessories
Click Scolmore has announced the launch of Metal Clad Pro, a robust new range of premium, durable wiring accessories that combine a modern aesthetic with Click’s latest innovations to offer a stylish, long-lasting performance for any environment Designed with a contemporary, curved profile, with matching surface boxes, the Metal Clad Pro range comprises switches, socket outlets, modular plates, fused connection units, as well as surface and blank boxes, and the entire range is available in two striking finishes: Metal Clad Grey’ and Polar White Sitting alongside the existing Metal Clad product portfolio, Metal Clad Pro provides installers and designers with a more modern wiring accessories solution. The modular construction allows for easy modifications and custom switching solutions, ensuring total flexibility on-site The products are packed with features that incorporate Click’s most recent product improvements as standard to create a new, premium surface mountable range. These include contemporary curved profile with matching back box profile, LED indicator, Ingot-style socket pins, new insert shapes, 3 pin safety shutters, and customisable configurations. All Metal Clad Pro Fused Connection Units contain all the features from Click’s recent FCU re-design and now also include a host of new features, including: fuse orientation, lockable fuse drawer, angled terminals, strip length marking and enhanced fuse ventilation. The Metal Clad Pro Socket Outlets and Fused Connection Units are tested and approved to BS 1363 regulations and have been added to Click Scolmore’s long-standing Kitemark Licence
NVC LIGHTING PROe Range
NVC Lighting has made a significant step forward in its journey towards sustainability transparency with the launch of its new PROe range The PROe range brings together products which meet the highest standards of energy efficiency and environmental responsibility, as well as offering customers insight into the environmental footprint of each product, thanks to Environmental Product
Declaration (EPD) verification With popular products such as YALE PRO, ADDISON PRO and BROADWAY covered under its new PROe range, NVC Lighting is providing customers with independently verified data on the lifecycle impacts of its lighting solutions The range is tailored for forward-thinking, sustainability-driven projects, ensuring that innovation meets accountability at every level
WERNER
AdjustaStepPRO Step Ladder
Werner has launched the versatile AdjustaStepPRO step ladder which is available in two sizes. In keeping with the Werner commitment of using quality durable materials, these new additions to the company’s portfolio of products are made from non-conductive fibreglass stiles that are highly resistant to weathering The product is certified to the latest EN131 standard and can take a maximum load of 150 kg Sold with a 10-year guarantee, this underlines the company’s reputation for producing products that are built to last and stand-up to the rigours of a building site Other key features of the AdjustaStepPRO include a HolsterTop which enables tools and materials to be held securely This increases efficiency on the job by reducing the number of times a user has to go up and down the ladder Available optional extras, which are compatible with all fibreglass ladders, comprise a utility bucket, job caddy and paint cup
LUCECO
LuxPanel Connect
Luceco has launched a range of Bluetooth Networked Lighting Control (NLC) products including a new high performance LED panel – LuxPanel Connect – which is ideal for office-type environments The LuxPanel Connect is a high-performance LED panel with a seamlessly integrated Bluetooth NLC sensor It is also the first LED luminaire in Europe to be certified as compliant with the new Bluetooth NLC standard With leading features such as adjustable motion sensitivity, default un-provisioned behaviour and a CRI Ra of over 90, it provides seamless system inter-operability, energy efficiency, and enhanced user control As LuxPanel Connect will integrate seamlessly with existing and new lighting infrastructures based on Bluetooth NLC, installation complexity and time are both reduced The combination is ideal for projects of all sizes, from small office setups to large commercial facilities, allowing for future expansions and perfect for scalability Smart automation and dynamic lighting control result in optimised energy efficiency and reduced running costs as well as minimising environmental impact Remote access, scheduling, and scene-setting features provide greater flexibility and convenience for users
THORN LIGHTING
Updated Oxane Lantern
Thorn’s popular Oxane lantern has been updated, combining the latest technology standards with a classic aesthetic Oxane has long been a popular choice for illuminating roads and streets With its sleek, elliptical styling, it fits seamlessly into modern cities, major highways, and more traditional towns and villages alike. The new generation of Oxane enhances its classic aesthetic while incorporating the benefits of upgraded LED technology, ease of maintenance and Zhaga connectivity Circularity was a core principle in the design of this luminaire –starting with the packaging, which is entirely plastic-free Oxane’s 100% recycled aluminium body uses a highly corrosion resistant alloy and all components can be replaced or changed, using a clever and robust tool-free opening system, for simple maintenance and upgrade. No glue is used throughout the manufacturing process, making it easy to manage end of life as well Oxane is equipped with high performance LEDs able to still provide up to 98% of their initial output after 100,000 hours of operation, making it an ideal long-term partner to light your way. A wide range of optics are available for highly efficient and comfortable light, exactly where it is needed, whether lighting a residential street, a busy road, a cycle path, or a pedestrian area
ELEX 2025
C AM E RA CAUGHT ON
JOSH COOK: THESE ARE JUST A FEW FINDS
JOB
ADVERTISER INDEX
Here is a useful summary of all the adverts that appear in this issue of Professional Electrician. Each is listed with its page number and a direct URL that will get you straight to the relevant online information.
