Professional Electrician & Installer May 2020

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TO EE FR DE RA ET TH

PROFESSIONAL

ELECTRICIAN THE BUSINESS MAGAZINE FOR THE ELECTRICAL TRADE

& INSTALLER MAY 2020

AN ASSESSOR CALLS WHAT HAPPENS DURING THE ANNUAL ASSESSMENT PROCESS?

BUSINESS ADVICE

HOW TO TIGHTEN UP YOUR PAYMENT TERMS

DISTANCE LEARNING & TRAINING RESOURCES

CPD OPTIONS TO IMPROVE YOUR KNOWLEDGE BASE

ALSO IN THIS ISSUE: CAUGHT ON CAMERA ● NEW PRODUCTS ● TECHNICAL INSIGHTS ● LETTERS AND MORE…

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Total Average Net Distribution: 71,632 Certification period 1 January 2018 - 31 December 2018

May 2020 Volume 36 No.5

Regulars 5 22 28 40 52 58 65

The latest developments in building information modelling (BIM)

VIEWPOINT MK ELECTRIC INSIGHTS THE CODEBREAKERS MADE 2 MEASURE CAPTAIN C-TEC PRODUCTS IN PRACTICE CAUGHT ON CAMERA

News & Views 11

The latest letters and opinion to land in the PE mailbox

15 Do you need to tighten up your payment terms?

Special Report 19 We follow the assessor and assessee through the annual assessment process

34

Technical & Training

Products & Business Solutions

31 Using metal conduit as a CPC

53 Deta explains how the company's fire rated downlight fittings satisfy the new NHBC requirements for recessed light fittings

34 The latest developments in building information modelling (BIM) and how it is expected to impact the future of the electrotechnical sector 37 Why the SPD function on Metrel's MFT equipment is helping contractors to check surge protection devices 38 Detailing the two most common methods of measuring electrode resistance where there is a single earth electrode for the electrical installation

54 Exterior security lighting: what options are available to contractors?

56 How to turn your customer’s bathroom into a ‘smart’ suite 60 Rounding-up the latest products, tools and equipment to help you in your work Do you want to become a ‘smart’ installer?

12 Your chance to bag a C.K wheeled case

Competitions & Giveaways 12 WIN Bag a C.K Magma Technician’s PRO Wheeled Case

21 WIN Get your hands on a GuardCam security floodlight system

25 WIN Loads of great goodies and prizes to be won

43 An overview of the training pathways available to electricians that want to take advantage of the growing requirement for skilled smart installers 47 We look at the latest training courses and remote learning opportunities available to electricial businesses

21 43 PROFESSIONAL ELECTRICIAN May 2020 3

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@proelectrician

professionalelectrician

pe@hamerville.co.uk

Professional Electrician, Regal House, Regal Way, Watford, Herts, WD24 4YF

Editor’s Viewpoint

Meet the team Editor RICHARD BOWLER email: pe@hamerville.co.uk Editorial Assistant PATRICK SWAN email: pswan@hamerville.co.uk Digital Manager REBECCA MCGEOCH email: rmcgeoch@hamerville.co.uk Advertisement Manager ANTHONY SCOTT email: ascott@hamerville.co.uk Assistant Advertisement Manager IAN TURNER Design GEMMA WATSON Production Assistant KERRI SMITH Group Production Manager CAROL PADGETT Distribution Manager KARL CLARK Managing Editor TERRY SMITH Publisher BRYAN SHANNON Printed by: WALSTEAD PETERBOROUGH Published by: HAMERVILLE MEDIA GROUP Regal House, Regal Way, Watford, Herts, WD24 4YF Tel: 01923 237799 Fax: 01923 246901 Email: pe@hamerville.co.uk PROFESSIONAL ELECTRICIAN is the business journal for the electrical contracting industry. It is available to the trade at leading electrical wholesalers throughout the UK. © 2020

Subscriptions to PROFESSIONAL ELECTRICIAN are available. Please contact us for rates.

Image References (Adobe Stock): Pg 6 Safe distance © Linda Bestwick Pg 15 Payment worry © Aramanda Pg 16 Payment terms © MQ Illustrations Pg 34 BIM © Blue Planet Studio Pg 38 Earth patch © Orlando Bellini Pg 54 CCTV phone © Grapestock Pg 56 Bathroom suite © Bongkarn

Something to build on!

A

nd to think we all drove ourselves half crazy for three years over something as trifling as Brexit! That unmitigated political disaster was a mere walk in the park in so many ways compared to the unprecedented global financial meltdown caused by the coronavirus. Just a few short weeks ago words like ‘social distancing’, ‘selfisolation’ and ‘lockdown’ were the preserve of Hollywood fantasists. As we speak, they occupy just about every waking thought and action as the world counts the cost, not just in monetary terms, but tragically thousands of lives cut short.

In common with just about every other small business out there, we’ve had to do a lot of soul-searching to decide how best to proceed on a daily basis. With many electrical wholesaler trade counters closed at the time of writing and the construction industry itself at odds about who should/shouldn't still be working, the risk of looking ill-informed or downright crass is all too apparent in a monthly journal with a long leadtime. Even our social media/digital team have struggled to keep current with the situation as it changes on an almost hourly basis.

Nevertheless, with the fantastic support of a loyal band of advertisers we have decided to put together a May issue as best as we can in

“IF ANY INDUSTRY CAN COME BACK FROM UNPRECEDENTED ADVERSITY, IT IS SURELY THE EXCEPTIONALLY RESILIENT AND BATTLED-HARDENED CONSTRUCTION SECTOR.”

the hope that in the midst of much darkness it may provide a few moments of light relief in the daily struggle.

We’re well aware that electricians like nothing better than finding about new products and the very latest tools and whilst it may be some time before you can actually get your hands on them in real life, we all know that there will eventually come the day when you can safely return to site.

For now however, as uncomfortable as it may be cooped up in our homes for weeks on end, we have to trust in the medical and social behavioural experts and pray to god that their theoretical models hold true and the number of casualties is nowhere near as high as originally predicted.

In that respect a number of commenters out there have compared the current crisis to a war zone and whilst we don’t wholeheartedly go along with that comparison (people are not going to bed every night wondering if their house will still be standing in the morning), there are some striking historical precedents to consider.

At the conclusion of WWII (as well as after other significant economic upheavals), it was to the construction industry that the nation instinctively turned to rebuild shattered lives and properties, and there can be little doubt that the skills of every trade – from electrician to builder and plumber – will be heavily in demand as a semblance of normality returns.

Their vital role within the local community has already been highlighted with many contractors volunteering together with their vans to make vital deliveries of provisions to the elderly.

And then of course there are the guys and girls risking their own health to help hospitals, establishments and homeowners with emergency maintenance. Cruelly, pipes don’t stop bursting, roofs leaking and electrics 씰

PROFESSIONAL ELECTRICIAN May 2020 5

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@proelectrician

professionalelectrician

pe@hamerville.co.uk

Professional Electrician, Regal House, Regal Way, Watford, Herts, WD24 4YF

A picture says it all Get up-to-date news, guidance and industry stories related to COVID-19 by visiting the Professional Electrician website.

Here’s a snapshot of some of this month’s top stories...

cutting out simply because of an unprecedented pandemic.

What’s in absolutely no doubt is that in just a blink of a watery eye the world has changed irrevocably as a result of this virus and the number of people working from home on a more regular basis in the future will almost certainly see a demand for extra space in the form of extensions and garden offices.

All this, of course, is for another day. Right now, it’s all about keeping your families safe and healthy.

Resilience to adversity is quite literally built in to those operating at the sharp end of the construction industry and whilst it may be facing its greatest ever test, we have no doubt that it will not be found wanting when called upon to get its sanitised hands properly dirty once again.

have long memories and this will not be forgotten in a hurry.

During the lockdown process, every single individual reading this column will have no doubt been reliant on businesses and services that they have a long-standing relationship with – whether from a business or lifestyle perspective.

It’s said that you’ll see an individual's true face in the most turbulent times, and the COVID-19 pandemic has provided a significant examination of how organisations and individuals really value ethics and their customers when the chips are down. If you didn't like the face that you saw from those that you do business with, or provide custom to, then we'd recommend that you hit them where it hurts – permanently. That short-term gain may not look like such a sound long-term investment if we all adopt the same attitude.

A boycott, Geoffrey?

Share you stories

Although the situation that the world has found itself in has created challenges and difficulties for the majority, there are a minority that will always attempt to profit from such adversity.

The rise of the profiteer in these unprecedented times is a stench that will remain long after the coronavirus has disappeared. A message to all of those organisations and resellers that so unscrupulously exploited the pandemic to make some quick cash: people

We’d love to know how PE's readers have been getting along during this time, and we're always keen to share practical, business or general advice through the publication. Get in touch with us at: pe@hamerville.co.uk

Richard B owler 6 May 2020

PROFESSIONAL ELECTRICIAN

Don’t forget that you can now get a monthly copy of PE delivered directly to your Inbox.

Sign up at: https://hamerville.co.uk/sign-upform-construction-titles

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@proelectrician

professionalelectrician

pe@hamerville.co.uk

Professional Electrician, Regal House, Regal Way, Watford, Herts, WD24 4YF

Letters PE readers share their thoughts on the big industry-related issues.

You can quote me on that Dear PE, I'm writing to you to voice my concerns about the quality and proliferation of so-called 'cowboy' electricians.

In my day-to-day work, I'm regularly coming across more of these 'have-a-go' sparkies, many of whom I believe to be undertaking dangerous work and leaving customers with un-certified and potentially lethal installations.

As these sparkies fall into what I'd call the 'unqualified and unregulated' bracket, there is no way that I can ever compete on price with them.

My question to the magazine and industry in general is this: how can we regulate against these people and weed them out of the market?

As I currently understand the situation, all 'qualified' electricians (like myself) pay for training, insurance, equipment, calibration, registration and much more. All things that allow us to operate both professionally and legally.

The 'cowboy' electrician, on the other hand, doesn't have to invest in any of this but is still able to purchase all the tools and materials required to undertake any work in the domestic marketplace.

Yes, we have Part P, but in my experience most customers still have no idea about this and what it means.

Yes, there are registration and CPS schemes, but again I've not met many customers who can name any of these to me. Very few also know how to check to

see if the individual they're employing is actually a member.

I appreciate that many of the scheme providers will follow-up on misuse of logos and branding but (and this is a BIG but), how about those sparkies who do not use any logos, branding or other form of documenation to prove who they are?

In many cases these people are almost hidden away, working in conjunction with kitchen fitters, builders, plasterers or similar trades in order to get their work. Or, maybe, they're just 'friends' who believe they're actually competent.

As far as I can tell, there is no easy follow-up route for the end-user customer to register a complaint, once the installation has been completete. Regardless, many customers have no idea how dangerous a particular installation may be, but should it have to come to tragedy striking before the culprits are brought to justice?

To quote a few classic lines from customers over the years: 1. “Yes, they're qualified, as the individual said he'd worked on high-voltage lines in Latvia” 2. “Yes, these kitchen electrics are fully certified” (the customer than proceeded to produce a photocopy of a single page from an old electrical installation certificate that had been signed by 'the customer' – apparently that's how it's done).

3. “Yes, of course they're the correct lights.

The shop assistant says there in no such thing as Class-2 and sold me these instead, he reckons you're talking rubbish” (they then purchased the Class-1 lights and another 'electrician' installed them into the existing circuit, which incidentially has no CPC)!

4. “I've just been speaking to my builder and he doesn't understand why you're undertaking all these test and inspection procedures. He's been building in London for many years and none of the electrical installations have ever needed to be certified before.”

In my opinion I feel that we need a single agency that is responsible for regulating ALL electricians, no matter which scheme or company they belong to. In this case, each individual electrician would need to be vetted and confirmed.

In the 15 years that I've worked as a professional electrician, I've never once been asked by a customer to provide evidence of my qualifications, or even if I'm registered. I have, however, come across way too many dangerous electrical installations to last me a lifetime.

Best regards, Kevin White Blue Wizzard

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PRIZE DRAW @proelectrician

professionalelectrician

pe@hamerville.co.uk

We need to get drastic with plastic Dear PE, I'm writing to you regarding the amount of single-use plastic waste within the electrical trade.

Most wiring accessories (sockets/switches) come either in a small plastic bag or a hard plastic container; with the supplied screws usually in a plastic sleeve nowadays too.

The attached photos will give you an idea of the amount of waste I'm talking about. This has come from products used on a small garage conversion.

I dread to think of the amount of total waste in the electrical trade per year. Personally I think it's something the trade (and especially the suppliers) need to address.

Best regards, Graeme Smith

Dear PE, I have concerns about the amount of packaging used by electrical manufacturers. In addition to the waste produced, there is the time used up by unpacking each item before sorting it out when I get home. I'll now do this the evening before a job so that we can save time on-site.

I'm sure, like myself, more contractors would welcome the option of buying downlights and lamps in egg-carton style packets, in 5s and 10s, with a single outer packet.

WIN A C.K MAGMA TECHNICIAN'S PRO WHEELED CASE

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I

f your work requires you to regularly transport a heavy toolkit, then C.K Magma’s new Technician’s PRO Wheeled Case (MA2652) offers the perfect solution. Ideal for all terrain use, this innovative wheeled case offers more storage than ever before and will effortlessly transport a fully laden toolkit which, with test equipment and power tools, can top 20kg. With back problems a significant cause of loss of working days for all trades, the C.K Magma Technician’s PRO Wheeled Case has been designed to take the strain, providing quick and easy transportation of a heavy toolkit to any location.

Features and benefits The unit's balanced design includes a rugged and durable chassis, wheels and a telescopic handle, ideal for effortless movement of larger toolkits, test equipment and power tools, whether on a factory site or commercial premises.

Extra storage now includes 50 deep square pockets/compartments, with handy vertical pockets for clear visibility and organisation of tools, while other quality features include: adjustable straps for easier access to main pocket compartment; lockable zip system for extra security; an extra wide main compartment with a red lining for high visibility; a hard protective divider between tools and test equipment; and a zip down front panel for A4 document storage.

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Deadline for entries: 10/06/2020. Usual T&Cs apply.

12 May 2020

PROFESSIONAL ELECTRICIAN

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READER COMMENT

“PAYMENTS SHOULD BE ON YOUR TERMS”

R

Gary Alder CEng MIET – BMBJV, Electrical Lead at Tideway, explains why you need to tighten up your payment terms and why accepting increased payment periods could be catastrophic for a SME business.

eceiving payment on time is vital to a business’ ability to stay afloat, but what if you aren’t getting paid on time?

The strong likelihood is that this will harm cash flow for companies of all sizes – from the one-man-band through to the major conglomerates.

As a former Director of a medium-sized business, I’ve personally experienced a range of payment terms. Typically, most businesses will request 30-day payment terms, however an increased trend, post-recession, has seen companies requesting 60 to 90-day payment terms.

When faced with large financial opportunities and projects, being offered 90-day payment terms, in particular, becomes an option that a business seriously needs to weigh-up before making a commitment.

I fell foul of this particular pitfall in my own business when we were subcontracting for the same company across two separate projects. After initially agreeing to the 90-day terms I then realised that getting wholesalers, agencies and all manner of suppliers to facilitate longer payment terms was not only incredibly difficult, but also hurting the industry at the same time.

It was a mistake to accept those terms, and a significant lesson that I’ve learned.

It also begs the question that with the ever-increasing number of large projects running beyond programme, how long can the industry realistically continue to operate in this manner?

Although it’s completely understandable that all contractors want to pass on risk, the rut needs to be stopped soon to avoid long established businesses from disappearing. Again, I can talk from experience as I’ve personally lost a long-term business which had been operating successfully for over 45 years but, due to late payments, was unable to continue trading.

Can the electrical industry look to other sectors and follow suit?

Many service industries require deposits, or payment upfront. For me, the responsibility must start with the client. If the client has the budget to spend, regardless of size (domestic, commercial or industrial), they cannot operate in a way that will impact their supply chain and must instead look beyond their own bottom lines when tendering projects.

Some clients within the water industry have led the way in mandating 30-day payment terms for all third parties

associated with their contract. Many businesses will also operate fairly and allow costs to be covered, ensuring that they don’t operate at a loss.

In a recent survey I conducted, I asked if domestic electricians were modernising and beginning to utilise mobile card payment services in their day-to-day services. Surprisingly, 60% of the 140 surveyed stated that they didn’t have a card payment facility. Surely in this modern era, with cash becoming increasingly obsolete and electronic payments becoming ‘the norm’, electricians need to move with the times.

National statistics show us 20% of small businesses fail within the first year, rising to 50% over a five-year period. A regular mantra that I see on social media from domestic electricians is ‘finding the right client’, but this isn’t always possible, so businesses need to learn how to safeguard their cash flow.

Here are some key fundamentals that I’d recommend for any electricians that are looking to start up a business: Always provide a quotation This gives you the opportunity to document clarifications and exclusions, as well as what you’re providing within your services.

It may take a bit of time, but this will help to

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READER COMMENT

PUBLIC SECTOR JOBS SUFFERING FROM LATE PAYMENT

avoid time being wasted on agreeing what was/wasn’t included originally or, even worse, arguing over payment.

Insert payment terms within the quotation When a client accepts a quotation, it should be clear what they’re agreeing to.

Never provide a quotation without first viewing the project and meeting the client This offers a valuable opportunity for the client to meet you and to understand your core values. Most domestic installations will heavily factor this in alongside bottom-line cost.

Avoid being negotiated into a price you aren’t willing to give Understand your overheads that need to be made. Negotiating below this will ultimately affect your hourly rate as, theoretically, the job can’t be done any quicker and overheads remain a constant.

If possible, utilise estimation software These packages typically have standard values for the installation of cabling, containment and equipment and can ensure consistency across all quotations produced.

Detail payment milestones Typically for domestic works this can be ‘first fix’, followed by ‘second fix’. Every

16 May 2020

PROFESSIONAL ELECTRICIAN

The latest sector-wide Building Engineering Business Survey, sponsored by Scolmore, shows that payment conditions in our industry remain poor, with the majority of public sector work being paid for after more than 30 days.

The survey, which included data from leading industry trade bodies ECA, BESA, SELECT and SNIPEF, found that, in Q4 2019, 65% of direct public sector and 84% of indirect public sector jobs were paid for after more than 30 days.

Around half (49%) of respondents said that, in their organisation’s public sector work, clients typically inserted under-30-day payment clauses. Ensuring payment within this timeframe is mandated under public sector payment rules.

ECA Director of Legal & Business, Rob Driscoll said: “It’s hugely disappointing that, after all the progress made by public sector in integrating payment initiatives, and in the face of challenges like Brexit, flooding, Coronavirus, IR35 and Reverse VAT, Government is unable to ensure its own payment data meets basic legal compliance obligations.”

In addition to consistent late payment, the survey also showed that almost two-thirds of respondents (64%) were facing cash retentions. opportunity to ensure you’re covering costs as you progress through a project, the better it will be for you in the long run.

Clearly stating these from the outset also enables budget management for your client.

I’ve noticed recently that there is a trend for medium-sized business with larger turnovers to offer a discount, which incentivises on-time payment. Through my own experience, I’ve found this to be a very difficult one to manage, particularly if you incur interest on late payments.

In a nutshell, the industry needs to become smarter about how we utilise payment terms and methods across the board. Electronic transfers, payment terms

and card payments are all at our disposal to ensure a smoother, stress-free life, so let’s start taking advantage of them.

Gary has recently launched a new podcast for electricians to chew the fat about the industry and listen to stories from fellow industry colleagues. Follow it on Twitter at: @HittheLightsPod

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SPECIAL REPORT

A NICE(IC) DAY FOR AN ASSESSMENT

What happens when it’s time for your annual assessment, and how does the process work? PE experiences a day in the life of both the assessor and the assessee.

W

hen thinking of our own experience with examinations and tests, we can distinctly recall one particular teacher drumming into us: “Fail to prepare, prepare to fail.”

But no matter how much preparation you do, no one enjoys being tested and for the majority of people, nerves are synonymous with the experience.

In order to maintain NICEIC registration, contractors must undergo a regular assessment. This face-to-face interaction between them and the NICEIC Assessor aims to iron out any elements of the working practice that needs improving and to ensure people are working to a safe and compliant standard. Competency is checked through technical discussions and site assessment.

House call The morning started with NICEIC Assessor Daniel Smith and I pulling up to the house of the contractor in question – David Morris.

David has been an NICEIC Approved Contractor for five years and is the Director of Smart Home and Lighting Systems, based in Loughton. His team consists of four staff, two of whom are apprentices.

Before anything else takes place, a documentation check must be carried out.

David, clearly familiar with the process, had all the necessary documentation laid out for checking. Among the paperwork was a dog-eared, colour-coded copy of

the 18th Edition Regulations – proof, if any were needed, that David’s copy gets a lot of use – and, after Daniel had checked the copy of BS7671 to ensure its authenticity, David revealed that he had passed the 18th Edition examination in December – a good start to proceedings.

As a scheme requirement, Daniel asked to see a signed and dated health and safety policy and a sample of the electrical installation certification issued by the contractor. This is to check the certification issued by the company is filled out in compliance with BS7671.

Both requirements are designed to help cover the electrician for any potential discrepancies regarding the completion of a job and the risk David and his team take on when undergoing work. Proof of in-date Public Liability Insurance is one of the most important pieces of paperwork Daniel must see – without this the assessment cannot take place.

Once Daniel filled out his own form to confirm David and his business carry the appropriate paperwork, he then checked David’s kit and asked him a series of

technical questions before we set off to view his work on-site. David offered a selection of jobs to Daniel, who then picked the two he wanted to assess.

This particular process can sometimes come under scrutiny, as some believe that it should be the assessor who chooses the work to be assessed at random, rather than the jobs that the assessee has chosen to put forward. When asked about this, Daniel said: “One of the reasons for this is that it’s not always practicable for certain scope of works. All Area Engineers need to see electrical work that reflects what the contractor normally carries out.

That said, The Area Engineer must use

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SPECIAL REPORT

due diligence when selecting the appropriate work to be sampled, based on factors that include the type of work and the geographical spread of work.”

When quizzed about the accountability of the individual assessors, Daniel explains that a Regional Engineering Manager is responsible for auditing all NICEIC Assessors and their internal verification department reviews assessment reports for their content and accuracy.

“Additionally, Certsure (the organisation that owns NICEIC) is audited once a year

by UKAS, who also review files and assessment reports in order to maintain UKAS accreditation,” he says.

On arrival at each of the job sites Daniel assessed David’s safe isolation procedures when working on live circuits, along with the testing and quality of work being carried out by the company. At the end of the site assessment, Daniel and David discussed the assessment outcome and any improvements that should be made on future work.

Having viewed the work produced by David and his team and witnessed the thorough assessment given by Daniel, we was impressed by the quality and pride that both individuals take in their respective jobs. Daniel’s approach to his role exemplifies that the assessment process is something that should be embraced, not feared, and that an Area Engineer is an aid rather than an enemy.

Help and support “The assessor is there to help and support the assessee and we’re passionate in what we do,” says Daniel.

“We’re there to provide technical excellence through education, raising awareness, promoting best practices and answering technical questions. We have a duty of care to check the work sampled is safe and meeting the minimum standard set out within BS7671”.

When asked what advice David would offer to others that are due an assessment soon, he says: “It’s not as scary as you think. The NICEIC want to work with you and will answer any questions you have on the day. To help with the preparation, Daniel sent me an assessment checklist

prior to the visit. Contractors may also receive a supplementary phone call from their Area Engineer and/or receive a checklist in the form of a text message.”

Clearly the annual assessment holds an enormous amount of importance to our industry, providing a chance for the scheme operator to check that the standards are consistent from year-to-year, and in line with the latest industry guidance and regulations. It also allows the assessee to get an idea of what needs to be improved moving forwards.

Asked if there is anything that could be done, from his perspective, to improve the assessment process, David responds: “I’m very lucky to have Daniel as my assessor and we’re in contact throughout the year.

“This makes my assessment a much more comfortable environment when it takes place. I believe this helps the process enormously and takes away some of the anxiety that those being assessed can experience during the process.”

If you’re due your annual assessment in the near future, be sure to contact your scheme provider directly to discuss options for remote and safe-distance assessments at this time.

GET MORE DETAILS ON NICEIC MEMBERSHIP AND BENEFITS AT: WWW.RDR.LINK/EQ002

20 May 2020

PROFESSIONAL ELECTRICIAN

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PRIZE DRAW

WIN A GUARDCAM DECO SYSTEM

Two smart security floodlights to be won with ESP.

E

SP’s GuardCam Deco is a combined Wi-Fi security camera and LED floodlight system, which has been designed with ease of set-up as a key feature, including the option for remote monitoring via smartphone or tablet, using ESP’s specially developed GuardCam Deco App. With a built-in camera that offers full 1080p HD live viewing and recording, the GuardCam Deco is the perfect all-in-one solution for domestic and commercial applications.

On approaching the unit, GuardCam Deco will detect the intruder with proven PIR technology at a distance of up to 10m from the unit. It will floodlight the area, initiate a video recording and provide the user with an option to deliver a two-way audio message or activate the in-built alarm warning.

It features an adjustable 16W high-intensity LED security lamp (3000k colour light and 800 lumen) and you can remotely dim or turn on/off the LED lamp via the App. It will record up to 200, twenty-second video sessions onto the supplied 8GB storage, and this is expandable up to 64GB. The integral high-resolution digital camera offers wide angle camera view and clear image recording in video format, while night images retain colour and clarity due to the automatic LED light illumination.

GuardCam Deco is available in a silver or black finish, features a robust metal housing and is IP55 rated.

ENTER THE FREE PRIZE DRAW TO WIN A GUARDCAM DECO SECURITY SYSTEM AT: WWW.RDR.LINK/EQ003 Deadline for entries: 10/06/2020. Usual T&Cs apply.

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NSIGHTS THE HEALTHY APPROACH TO ELECTRICAL ACCESSORIES Emma Segelov, MK Electric’s EMEA Marketing Operations Manager, discusses electrical accessory solutions for environments where hygiene is a priority.

Hospitals and other healthcare institutions, such as nursing homes, go to great lengths to prevent patients from acquiring infections whilst under their care. According to research published in the British Medical Journal, every adult patient who contracts a Healthcare Acquired Infection (HCAI) will have an increased length of stay in hospital, at cost of more than £586 per day. At a time when health services are under considerable pressure to free up resources, preventing HCAIs has never been so critical.

This is primarily achieved by maintaining a hygienic environment through a robust cleaning regime and regular handwashing, but in addition, the use of antibacterial products also has an important part to play.

In terms of wiring devices, a solid recommendation is MK Electric’s Logic PlusT range. It is produced using urea formaldehyde; a high-grade thermoset material that has similar intrinsic properties to antimicrobial additives and kills harmful bacteria, such as MRSA, E. coli, salmonella and Klebsiella pneumoniae.

As the anti-bacterial property is inherent in the actual compound of the product, Logic Plus is incredibly effective at killing dangerous bacteria.

mkelectric.co.uk

Independent laboratory testing collected over a 24 hour period, showed a kill rate of 99.9% against MRSA, E. coli and Salmonella and had a kill rate of 98.9% against Klebsiella pneumoniae.

In addition, the range is scratch-free thanks to high quality mould tools, meaning there are no dirt traps for the bacteria to spread – another way to help optimise safety.

If you’re specifying or installing PVCu cable management systems, MK Electric's Prestige 3D Antibac Blue is designed to help to kill bacteria which can grow on surfaces such as trunking systems, providing over a 99.9% kill rate against MRSA, E. coli and Klebsiella pneumoniae, as confirmed by independent laboratory testing collected over 24 hours. It uses an additive within the PVCu which

acts as an effective weapon in killing harmful bacteria and can be specified alongside Logic Plus to provide a complete antibacterial solution.

As the additive is homogenous with the PVCu compound the protection runs throughout. There is no loss of effectiveness where the trunking lengths are cut on-site or if the surface becomes scuffed or scratched. It also has a fluorescence under UV light and glows blue for easy product identification and client confidence.

The antibacterial additive used in the range is registered with the Environmental Protection Agency (EPA) and compliant with the European Biocidal Products Directive (BPD)2.

Logic Plus and Prestige 3D Antibac Blue are manufactured in the UK and distributed nationally. Therefore, we can provide a level of certainty around product availability during periods of increased demand.

For more information, visit: www.mkelectric.co.uk

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GIVEAWAYS

RED ARROW ELECTRICAL DISTRIBUTION

BENDITNOW 1 X CONDUIT PIPE BENDING MACHINE TO BE WON!

5 X DISCUS LED DOWNLIGHTS TO BE WON! The new ‘smart’ Discus is unlike most LED downlights available today and Red Arrow Electrical Distribution is giving five away this month. As a streamlined, quality-focussed manufacturer and distributor of competitively priced lighting and electrical products to the wholesale industry, Red Arrow is committed to providing a wide range of innovative products.

And Discus is just that. Equipped with a smart, fully-adjustable mounting bracket, it’s ideal for retrofit applications. Add flicker-free, smooth dimming and wattage selection, plus an integral PIR motion sensor and you can see why it really is the next generation of ultra-smart downlights!

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For the tradesmen and women out there who have seen this product out in the field, you'll know exactly how this great bit of kit can take the effort out of the bending process.

The team at Benditnow has years of manufacturing these quality conduit pipe bending machines and prides itself on the service it provides and the results the user obtains. Additionally, the products are all manufactured in the UK. This month's lucky winner will bag a 20&25mm conduit bending machine – priced at over £300!

ENTER THE FREE DRAW AT: WWW.RDR.LINK/EQ005

DEWALT 1 X DCN701 18V XR ELECTRICIAN'S STAPLER TO BE WON! The DEWALT DCN701 18V XR allows electrical contractors to secure cables on the jobsite faster and more consistently. Its cordless design allows users to work without need for hoses or cables, while automatically adjusting depth of drive based on cable thickness. The staple fits snuggly without pinching. Furthermore, a compact size of 200mm allows the user to work between joists, and a built-in LED light illuminates the working area when power isn’t available. Users can look forward to easy use and increased productivity due to the fast actuation speed and a 35 staple capacity.

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PROFESSIONAL ELECTRICIAN May 2020 25

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RADI8 INDUSTRIES

1 X SMART THERMOSTAT AND IR PANEL BUNDLE TO BE WON!

Operated either manually or via a smartphone App, the Netmostat N-1 thermostat offers reliable and fast remote access for any type of electric heating. The product fulfils the most stringent quality and usage requirements while the smartphone application being available on any Android or IOS device means the Netmostat is accessible to everyone. A user-friendly interface allows not only for ease of use and an end to countless confusing symbols, but also means a significant reduction of energy bills thanks to how efficient users can be with it. Users can save up to 20% on annual heating bills with the Netmostat, it is claimed.

Also in this month's prize bundle is a 1,200 x 600mm 720W infrared heating panel, guaranteed to bring warmth to wherever you need it – be it in the home or business. You'll save space and money while being kinder to the environment.

ENTER THE FREE DRAW AT: WWW.RDR.LINK/EQ007

IDEAL INDUSTRIES EMEA 3 X TWIN AND EARTH CABLE STRIPPER UNITS TO BE WON! IDEAL’s Twin and Earth Cable Stripper for flat cable is capable of stripping cable up to 12mm wide and conductors from 0.75 to 2.5mm2. The open-throat construction allows for unlimited strip length, while it neatly removes the outer cable sheath and inner wire sheathing to desired lengths. Simply feed the wire through the open throat and close the handle, which then grips down on the cable and, in turn, cuts into the outer sheath and pulls it forward. Having removed the outer insulation, you can now repeat the process, stripping the inner cores to the desired length. The Twin and Earth Cable Stripper features a light weight, ergonomic design which reduces user fatigue. It has self-adjusting, specially hardened and replaceable stripping blades.

ENTER THE FREE DRAW AT: WWW.RDR.LINK/EQ008

HULTAFORS 3 X HAMMER SETS TO BE WON! Whatever type of hammering jobs you have to do, the Hultafors Tools range of hammers delivers all the power and precision you’ll need. This set of three hammers from Hultafors includes a bricklayer's hammer, a carpenter's hammer and a T-Block hammer. They're tools that can handle the toughest work, delivering the best possible levels of precision, performance and safety. They’re all ergonomically designed for ease of use and come with a special grip technology – perfectly crafted for your needs.

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TO ENTER THE GIVEAWAYS YOU’VE SEEN PROMOTED ON THIS PAGE, OR ANY OF PROFESSIONAL ELECTRICIAN’S MONTHLY PRIZE DRAWS, GO TO: WWW.RDR.LINK/EQ010 26 May 2020

PROFESSIONAL ELECTRICIAN

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THE

CODEBREAKERS WARREN GILL: THIS PHOTO IS OF A SUBMAIN WITHIN A BARN, WITH MULTIPLE SUB MAINS TAKEN FROM THE SUPPLY CABLE TO THE PICTURED CONSUMER UNIT. IS THAT THE SWA ENTERING BOTTOM RIGHT, WITH TWO OTHER SWA CABLES TO OTHER CONSUMER UNITS BEING THE OTHERS? INTERESTING! Unfortunately, some of the poorest installations and lack of competency can be found in agricultural buildings and farm premises across the UK. The picture you’ve submitted shows a complete disregard for electrical safety and is also at risk of overload and potential fire. What we initially see is the incoming power, the bottom SWA, doesn't appear to have a circuit protective conductor (cpc). The armour may be the cpc, but that isn't known from the picture, as there is no fly lead connection, and this is a plastic board. If the intention was to isolate the incoming Earth from the sub-board and create a TT Earthing arrangement, the earthing conductor to the Earth electrode could be the larger 10mm2 + cable connected to the MET. There is a requirement for a circuit to have a cpc throughout its length, Reg 412.2.3.2, so the inspector will have to check that the incoming SWA fulfils this requirement. While we're looking at the MET, it would appear that the two sub-board supplies have the black SWA conductors attached, but not marked as the cpc, which is also a requirement of Reg 514.4.2. The incoming supply Line conductor

GET THE BOOK AND CRACK THOSE CODES!

(bottom right) is also using a Neutral connector block of what was originally a dual RCD high integrity board. This is incredibly dangerous, as there are now terminals that are at Live potential, which are not expected to be. This re-configured neutral bar is then used to supply the CU itself and the two external sub-boards. The two sub-boards now possibly have no overload or fault protection, depending on the CU supply characteristics. If the incoming supply has been made into a TT Earthing arrangement, the two sub-board supply cables have no protection. If the incoming supply is not TT, then there is no protection, because the cpc may not be extended to the CU, in which case the supply cable protection won't be protecting the two sub-board supplies either. It is a requirement of Reg 415.2.1 that the armour of an SWA cable is connected to the cpc, as the gland and initial stranding are considered to be exposed-conductive-parts if they're not used as the cpc. Neither of the two sub-board supplies appears to have their armour connected to the cpc, and therefore likely don't comply. It is expected that to isolate the two out-going,

Updated for BS 7671:2018, NAPIT’s EICR Codebreakers publication is purpose-written to aid contractors, inspectors and clients, and now includes updates to align with the 18th Edition of the wiring regulations. A 2018 Professional Electrician & Installer ‘Top Product’ award winner, the book is the perfect technical aid for electrical professionals and their customers.

28 May 2020 PROFESSIONAL ELECTRICIAN

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Need help with cracking those all-important EICR codes? Every month the technical team at NAPIT will be studying your latest ‘Caught on Camera’ photos and offering advice on the next steps, should you find a similar installation. If you want the team at NAPIT to help crack your codes then send your pictures through to us at: pe@hamerville.co.uk

and any final circuits, it would only be required to operate the CU main switch; however, this is not the case. The supply to the CU would need to be isolated to make it safe, which is extremely dangerous, as to not do so would leave the aforementioned "neutral" bar still Live. The re-configured "neutral" bar and it's now Live potential conductors pose a threat to the floating disconnected circuit within the CU. There is a potential that these disconnected conductors could come into contact with the now exposed Live, "neutral" bar, so this must also be looked at for coding.

This is/was originally an MK board, but has had a Schneider RCD fitted, so we need also to code for mixed components within an Original Equipment Manufacturers (OEM) enclosure. Regardless of any mixing issues, and there appear to be no thermal issues at this point, the connection of the RCD Neutral conductor is of great concern. Without further knowledge of the install, the RCD Neutral conductor looks as if it is either: 1. Not connected properly into the RCD supply terminal, or 2. Not connected at all, possibly because of unwanted tripping, or 3. Not connected because the connection to the actual Neutral bar is via the out-going side of the main switch.

When we look very closely at this picture, I suspect that item 3 here is the method of connection, which may render the RCD non-operational. This means that some final circuits of the CU may have no additional protection in accordance with Regs 415.1, 411.33 or 705.411.1. As this is likely to be a TT Earthing system, although not confirmed here, there is a preference to ensure protection via an RCD in accordance with 411.5.2(i), which will not have been met here if the RCD is not in circuit and operating correctly. All in all, a truly shocking and dangerous installation!

The 18th Edition Codebreakers publication is priced at £17.99* (members) or £19.99* (non-members). Hard copies and digital issues are available. * prices exclude VAT, postage and packaging

VISIT: WWW.RDR.LINK/EQ011

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Technical & training TAKING YOU STEP BY STEP THROUGH PROCEDURES AND REQUIREMENTS FOR ELECTRICAL INSTALLATIONS

T

USING METAL CONDUIT AS A CIRCUIT PROTECTIVE CONDUCTOR

he purpose of this article is to remind contractors that whilst it is permitted by Regulation 543.2.1 for a circuit protective conductor (cpc) to be formed by rigid metallic conduit the relevant safety requirements of BS 7671 must be satisfied.

Introduction

Although, it may not be common practice to utilise a metallic conduit as the sole cpc for one or more circuits installed within, it is not uncommon however to encounter existing installations where the conduit has been used as the cpc, as shown in Fig 1.

A correctly installed rigid steel conduit system should, due to its size, robustness and associated parallel earth paths, provide a reliable cpc for most, if not all, sizes of conductor installed within it.

In view of this, where new work or additions within an existing installation are planned it may, in some circumstances, be beneficial for the designer to use conduit as the cpc, rather than installing separate cpcs. For example, using conduit as a cpc may allow more circuits to be accommodated. It may also in some cases permit the use of a smaller diameter conduit. However, in such circumstances careful consideration must be given to the effects of grouping, which is outside the scope of this article.

•

The connection of protective conductors shall be permitted at every predetermined tap-off point.

Compliance with Regulation 543.1.1

The method of selection is generally the simplest method for verifying compliance with Regulation 543.1.1 as shown in the following example.

A single-phase radial circuit, comprised of 70 0C pvc singles (copper conductors) having a csa of 6.0 mm² is installed in 20 mm diameter heavy gauge metal conduit and protected by a 32 A Type B circuitbreaker to BS EN 60898. To confirm that the conduit is sufficient to serve as the cpc, Table 54.7 of BS 7671 may be used as follows: from Table 54.7 the minimum csa required is:

K1 115 X S= X 6 = 14.68 mm2 K2 47 For compliance, the nearest larger size standard conductor is required.

Where: S is the csa of the largest line conductor contained within the conduit.

K1 is obtained from Table 43.1, a 70 0C pvc insulated copper conductor ≤ 300 mm csa.

K2 is obtained from Table 54.5, a 70 0C pvc insulated conductor installed in a steel conduit.

To verify compliance, reference should be made to either the conduit manufacturers data or suitable published guidance. From Table D5 of IET Guidance Note 1 Selection and Erection, a typical value for 20 mm diameter heavy gauge steel conduit is 83.1 mm2, therefore compliance with Regulation 543.1.1 is achieved.

As an alternative, the minimum crosssectional area of steel conduit may be determined by applying the formula of Regulation 543.1.3 which is based on the adiabatic equation and applicable for disconnection times of up to 5 seconds.

However, where a conduit contains conductors varying in csa, compliance with Regulation 543.1.2 (i) will need to be confirmed for all circuits and calculated based on the most onerous fault conditions.

It should be recognised that where a conduit is connected to a metallic trunking, the trunking may not be suitable for use as a cpc unless appropriate high conductive

It is the responsibility of the designer to fully assess the risks of using the conduit as a cpc, and to verify compliance with the relevant requirements of BS 7671.

Metallic conduit Earthing terminal

In particular, the requirements of Regulation 543.2.2 should be satisfied: •

Electrical continuity should be assured either by construction or by suitable connection.

•

The cross-sectional area (csa) of the conduit should comply with Regulation 543.1 or be verified by test.

Earthing tail

Light switch

Fig 1

Conduit use as a cpc for multiple circuits

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Technical & training links are used across the joints, to assure continuity (Regulation 543.2.2 (i) refers).

Exposed-conductive-part

Where fault protection is provided by Automatic Disconnection of Supply (ADS), as would generally be the case, all exposed-conductive-parts of the installation must be connected to the same earthing system (Regulation 411.3.1.1 refers).

Therefore, whether metal conduit is, or is not, used as a cpc, it should provide reliable electrical continuity and be effectively and permanently connected to the Main Earthing Terminal (MET). Regulation 411.3.1.1 requires a cpc to be run to and terminated at each point in wiring and accessory. Where conduit serves as a cpc the earth terminal of each accessory, such as a socket-outlet or switch plate, should be connected to its metallic back box or enclosure using a separate protective conductor (Regulation 543.2.7 and 543.2.2 (iii) refers).

It should be recognised that in some circumstances a short length of isolated conduit, as shown in Fig 2, may not require

earthing as an exposed-conductive-part.

A typical example, may include extra-low voltage control wiring.

Electrical continuity

Every joint in the metallic conduit system should be electrically and mechanically continuous (Regulation 543.3.6 refers).

Therefore, plain slip or pin grip connection sockets should not be used (clause 6.8 of BS 7430: 2015 refers) and all conduit fittings, such as bushes, couplers and locknuts should be tight.

In addition, where conduit enters an enclosure, all insulating material such as paint or similar should be removed so that a low resistance connection can be maintained. Where an installation comprises of a mixture of metallic and non-metallic enclosures, additional precautions should be carried out to ensure earth continuity is maintained.

Protection against external influences

External influences can vary and are dependent upon the environmental conditions at the point of installation.

For example, conduits may be installed

Building structure

Catenary wire

ELV Cable Suspended ceiling

internally, externally, surface mounted or buried. For these reasons, all conduits should comply with the appropriate part of the BS EN 61386 series, and be selected taking account of conduit manufacturer’s instructions and product details (Regulation 521.6 and 134.1.1 refer respectively).

For example, conduit installed underground should conform to BS EN 61386-24: 2010 Part 24: Particular requirements – Conduit Systems buried underground.

Typically, surface mounted conduits are more likely to be accessible and easier to inspect than those buried or concealed.

As mentioned previously, where the protective coating such as paint is deliberately removed from an enclosure to maintain continuity or removed inadvertently during the process of cutting and threading of conduit, appropriate measures should be taken to prevent corrosion.

For example, where the protective coating is removed for the fabrication of a running coupler on a galvanised conduit installed outdoors, a suitable protective coating, such as galvanised paint, should be applied to prevent oxidisation (rusting).

Note: Where a flexible conduit forms part of the wiring system, such as for the connection of an item of machinery, the conduit must not be used as a protective conductor (Regulation 543.2.3 refers).

Summary

Irrespective of whether a cpc is formed by a conduit or by any other means permitted

by Regulation 543.2.1, it is the responsibility of the installation designer to confirm that all the relevant requirements of BS 7671 are met.

Isolated conduit

Class II enclosure

Fig 2

• •

Isolated conduit not requiring earthing

For other guidance and publications please see the NICEIC and ELECSA website.

For information about the NICEIC and ELECSA Approved Contractor or Domestic Installers schemes, visit www.niceic.com, www.elecsa.com or call 0333 015 6626

www.niceic.com | www.elecsa.com 32 May 2020 PROFESSIONAL ELECTRICIAN

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Technical & training

BIM – BACK FROM THE BRINK Darren Smith, ECA’s Digital Solutions Advisor, looks at developments in building information modelling (BIM) and how it is expected to impact the future of the electrotechnical sector.

I

n 2011, the Government issued its Construction Strategy, including a master plan to accelerate the adoption of digital technology in UK construction. The ultimate goal was (and remains) widespread implementation of BIM across a project’s life cycle – defining four BIM ‘levels’ to help clients and suppliers understand how BIM and digital technology should be used.

Despite a generally muted industry response since 2011, it would be wrong to dismiss the potential of BIM, and it is far from finished business.

BIM in numbers BIM does, admittedly, have a long way to go. The quarterly Building Engineering Business Surveys from 2018 found that among ECA Members, 69% of respondents in our sector had never been involved in a BIM project, and 24% had used BIM on only up to a quarter of their projects.

The figures for firms engaging regularly in BIM projects are still small – some 4% had encountered BIM on 25-49% of their projects, 2% had used BIM on between 50-74% of projects, while just 1% had used BIM on more than 75% of projects. Yet our sector need not feel inadequate – 2018 information from leading assessment body Achilles

34 May 2020

PROFESSIONAL ELECTRICIAN

suggests that ECA Members engage with BIM far more than most companies in other sectors of construction.

Conversely, statistics also clearly show what we stand to gain by fully embracing BIM. Recent research on behalf of Innovate UK identified eight specific benefits from the use of properly integrated BIM: 1. Time savings at both the construction and operational stages of the building life cycle.

2. Materials savings – by optimising materials for the life cycle of a building.

3. Cost savings from fewer changes during construction and improved clash detection.

4. Health and safety improvements.

5. Risk reduction through more accurate estimates of costs, delivery timelines and risks associated with a project.

6. Improved asset utilisation including planning the use of space, faster maintenance and refurbishment in operation and optimum placement of plant.

7. Improved quality for end users, due to better oversight on design, better 3D visualisation for clients and earlier input during the design process.

8. Improved reputation through a better experience for clients and end users.

Building the case for BIM Some firms may see BIM as a leap of faith. However, developing BIM capability has been shown to improve project integration and information sharing – and is likely to become increasingly important for forward-thinking firms as BIM and digital engineering continues to evolve.

Carl Collins, Digital Engineering Consultant for CIBSE, has worked on all British, European and International BIM standards since 2008.

He said: “Any firm that cannot demonstrate some BIM ability (in the commercial arena) will be losing work, and this situation will only increase.

Further to this, the digitisation of construction is creating far more efficient and agile players, so if you can’t compete, again, you will lose work.”

Future-proofing BIM Carl further observed that there are plenty of new BIM Standards in the drafting stage – mainly through European and International standards bodies – and these should be acknowledged by contractors, as they may be quoted in tender documentation.

Topics such as “BIM for health and safety” and “BIM for security” are already being discussed – the former for all contractors and the latter especially for electrotechnical contractors. With the

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THE BIM BREAKDOWN BIM levels were designed to support industry to ensure appropriate standards for effective and fair procurement. Each of the four levels represents an increasing maturity in use of digitisation and collaboration in a construction or infrastructure project: Level 0 – Projects will use only 2D computer-aided design (CAD) drafting. There is very little collaboration. Any data that is exchanged is typically done so via paper or print. Essentially, this is CAD, which by itself is not BIM at all.

ever-increasing connectivity of electrical components and systems, electrical contractors should carefully consider how they will use technology and information exchange processes going forward.

In the end, BIM should not be viewed as a series of requirements that have to be met as an additional piece of work. As Carl put it brilliantly, “Instead, look to what can be done when project teams actually communicate better, with better and more reliable information – and watch the benefits materialise. Ask not what you can do to share your data, but what sharing data can do for you.”

Level 1 – Projects will use a mixture of 2D and 3D CAD drafting. They will use a common data environment for the electronic sharing of data. This will often be managed by the main contractor and may be shared among team members. Projects may also use some standard data structures and formats. It could be referred to as ‘basic (or barely) BIM’, Level 2 – Projects will use intelligent, data-rich objects in a managed 3D BIM environment. All parties working on a project are able to combine their BIM and

design data to collaborate and share information through the use of a common data environment (CDE). The CDE enables users to carry out checks against data validation strategies to make sure they are on target. Respectable BIM. Level 3 – Projects at this level are fully collaborative. They use a single, shared project view for data integration, which all parties can access and modify as allowed through process and security controls. This is Advanced BIM, and way beyond common industry good practice.

“ANY FIRM THAT CANNOT DEMONSTRATE SOME BIM ABILITY (IN THE COMMERCIAL ARENA) WILL BE LOSING WORK.”

GET MORE TECHNICAL SUPPORT FROM THE ECA AT: WWW.RDR.LINK/EQ012

PROFESSIONAL ELECTRICIAN May 2020 35

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TECHNICAL & TRAINING Confirming the SPD limits the AC voltage to within the device’s spec. with a Metrel MI3152 multifunction tester.

HOW DO YOU CHECK THOSE SURGES?

Brendan Beaver, Manager of Metrel UK, looks at why the SPD function on Metrel’s MFT equipment is helping contractors to overcome this common issue.

I

was having a coffee at a recent exhibition when a contractor I was sharing the table with looked across at a stand and asked: “how do you test them then?” Unsure of what he was talking about at first, I soon realised we were looking straight at a stand that was displaying and selling surge protection devices.

“If RCDs can fail out of the box, why don’t surge protectors?”, the same contractor enquired. “Of course there is the indicator, but we all know that things can

go wrong in manufacture. The 18th Edition drives us to fit them now, but at the end of the day I'm responsible if these devices fail.

There seems no way I can protect myself”.

I was about to sympathise with him when I remembered that Metrel multi-function testers have offered a SPD function test for many years now. It's just never really been highlighted or spoken about because the installation of surge protection was relatively unusual until the 17th Edition (Amendment 1) brought it to the forefront of contractors’ minds.

How does it work?

The SPD function test is a very simple two-wire test. The instrument ramps up a test voltage and detects when current flows. It can then display and record the value of the voltage at which this happens.

Quick, easy and reassuring.

VIEW A METREL MI3152 INSTRUCTIONAL VIDEO AT: WWW.RDR.LINK/EQ013

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TECHNICAL & TRAINING

DOWN TO NAPIT’s Don Holmes details the two most common methods of measuring electrode resistance where there is a single earth electrode for the electrical installation.

W

ith the growing number of electrical installations incoporating an earth electrode, electrical contractors are increasingly being called upon to measure the resistance to Earth of electrodes in order to comply with Regulation 643.7.2 of BS 7671. Contractors who are unaccustomed to this test can ďŹ nd it challenging.

This article will offer some help by explaining the two most common methods of measuring electrode resistance where there is a single earth electrode for the electrical installation.

Measurement using a dedicated soil resistivity/earth electrode tester This method of testing is usually used where an electricity supply isn't available. Dedicated earth electrode resistance testers generally have test probes and coloured connecting test leads. Earth electrode resistance testers are available from different manufacturers and the test leads to the test probes and earth electrode under test must be in accordance with the manufacturer’s instructions.

The earth electrode test requires the use of two temporary test probes and is carried out as follows:

a) Isolate the electrical installation if connected to the supply at the main switch, verify the electrical supply is off using an approved voltage indicating device, lock off and label. b) Disconnect the earthing conductor from the earth electrode. c) Prepare the test instrument for use, checking that the instrument, test leads and test probes are in good condition and suitable for use. d) Insert the temporary test probes into the ground, with the first one being 15 to 25 metres from the electrode under test and the other 30 to 50 metres from the electrode under test, as illustrated in Fig 1.

Connection to the earth electrode is made using terminals C1 and P1 of a four terminal test meter. To be able to exclude the resistance of the test leads from the reading, individual leads should be taken from the test instrument terminals and connected separately to the electrode under test and the temporary test probes.

Where the resistance of the test leads is negligible, the test meter C1 and P1 terminals may be linked together and a single test lead used, as would be the case if using a three terminal test meter.

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PROFESSIONAL ELECTRICIAN

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Reducing earth resistance Table 41.5 note 2 of BS 7671 states that a value exceeding 200Ω may not be stable.

The resistance of an earth electrode to Earth can be reduced by installing it deeper using extendable rod- type electrodes. The resistance of an earth electrode to the general mass of Earth reduces rapidly with the first metre or so.

This reduction in resistance is less marked at depths greater than 2 to 3 metres in soil of uniform resistivity.

Take the following three resistance readings: 1. With the protection test probe T2 inserted in the soil midway between the electrode under test and the current test probe T1.

2. With the potential test probe T2 moved to position 3 metres back towards the electrode under test.

3. With the potential test probe T2 moved to a position 3 metres from its original position towards test probe T1.

The distance between the test spikes is very important. If they're too close together their resistance areas will overlap, resulting in an inaccurate value of resistance for the earth electrode under test. In order to obtain reliable results, the distance between the electrode under test and the current test probe C2 should be at least ten times the maximum dimensions of the electrode system. As an example, when the earth electrode under

test is 3 metres long, a distance of 30 metres is required.

On completion of the test and a satisfactory resistance reading, reconnect the earthing conductor to the earth electrode, remove the main switch locking device and label and restore the electrical supply.

Measurement using an earth fault loop impedance tester The earth electrode test is carried out as follows: ● Isolate the electrical installation at the

●

●

●

●

●

●

main switch, verify the electrical supply is off using a voltage indicating device with proving unit, lock off and label.

Disconnect the earthing conductor to the electrode at the main earthing terminal.

This method allows the test current to flow through the earth electrode alone and reduces the likelihood of any problems with parallel earth paths.

Prepare the test meter for use, checking that the test meter, leads, probes and clips are suitable for use.

Connect one lead of the earth loop impedance tester to the earthing conductor going to the electrode, then connect the other lead to the line conductor at the incoming side of the main switch for the installation (as illustrated in Fig 2) and carry out the test.

Note the reading which should be taken to be the earth electrode resistance.

Reconnect the earthing conductor, remove the main switch locking device and label and restore the electricity supply.

Other factors Moisture The greater the moisture content of the soil, the more the resistivity is reduced.

Moisture content is an important consideration in areas of large seasonal variation in rainfall. Ideally an earth electrode should be installed at a depth deep enough to reach the water table or present water level with salt content.

Temperature When soil becomes frozen, its resistivity rises but this only becomes significant near or below freezing point. The permanent frost-free moisture level is often some metres below the surface.

Regulation 542.2.4 should be consulted.

Chemical additives The contact resistance of an earth electrode with the surrounding soil can be improved by adding chemical additives to the soil. However, rainwater usually disperses the chemicals over time and this method requires constant monitoring. Care must be taken to ensure the chemicals used don’t harm the environment or cause damage to the electrode.

Conclusion An earth electrode is an important part of a protective measure of an electrical installation. The designer of the installation must be satisfied that it will provide a permanent and reliable connection to Earth with a suitably low value of resistance to Earth throughout its period of use.

FOR MORE INFORMATION ON NAPIT SCHEME REGISTRATION, VISIT: WWW.RDR.LINK/EQ014

PROFESSIONAL ELECTRICIAN May 2020 39

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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 asked: I’M GOING TO BUY SOME NEW TEST KIT AND I’VE BEEN TOLD THAT I NEED TO LOOK AT THE CAT RATINGS OF THE INSTRUMENTS, EVEN IF THEY’RE THINGS LIKE INSULATION TESTERS AND LOW-RESISTANCE OHMMETERS THAT ARE USED ON DEAD CIRCUITS. IS THIS RIGHT AND, IF SO, WHY?

We say: Yes, it’s right. The CAT rating, as defined in the IEC61010 standard, tells you how big a transient the instrument can withstand. If you’re testing with an instrument that doesn’t have an appropriate CAT rating and there’s a transient (spike) on the circuit, this could start an arc within the instrument. The arc will conduct current from the mains which can be very dangerous. You need to consider CAT ratings, even for “dead circuit” instruments, because you might accidentally connect these to a live circuit. Instruments with a CAT IV rating can be used anywhere on an LV installation and those with a CAT III rating can be used anywhere after the consumer unit or main distribution board. We don’t recommend instruments with lower CAT ratings for general purpose use. Also take notice of the voltage included as part of the CAT rating, which must always be higher than maximum RMS phase-to-earth voltage of the systems you’ll be using the instrument on.

MEGGER HAS PRODUCED A TECHNICAL GUIDE ON HOW TO ELIMINATE RCD IMPEDANCE UPLIFT. DOWNLOAD IT AT: WWW.RDR.LINK/EQ015

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TECHNICAL & TRAINING

SMART TECH: TAKE TIME TO CHOOSE YOUR ROUTE

The experts at KNX look at the training pathways available to electricians that want to take advantage of the growing requirement for skilled smart installers.

T

here’s such a wide choice of smart technology in the market that becoming a smart installer and benefitting from the boom should be easy, right? Scratch the surface, though, and you’ll find it’s not easy to work out the skill-set you need nor is plotting a road map to succcess straightforward. It’s more than likely going to be a never-ending process as you’ll need to keep up with the new trends and innovations that are hitting the market.

Of course, manufacturers of proprietary systems can offer quick and easy courses, often for free, promising that you can become a smart installer in a day using their systems. That’s fair enough.

However, just as the DIY and IoT market has massively driven awareness of smart home ‘connected' devices and increased consumer demand, so too has the B2B professional electrician woken up

to the opportunity that a hard-wired, properly networked, smart installation can bring. Smart technology needs to be viewed in this way and installers have a great chance to exploit the opportunity.

This means committing to training and investing in your business and your future.

There are a plenty of courses on smart home technology automation at college/apprentice level (City & Guilds) and for continuing professional development (via CEDIA etc), with many offering online and distanced learning routes.

Looking at all the options available will soon make you realise that scheduling the right matrix of courses to develop the solid

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TECHNICAL & TRAINING

Bus) and is now used globally by over 90,000 partners and integrators. It's called KNX and it is 30 years old this year.

skills base you’ll need is a major undertaking in itself. Budgeting for the fees and losss of earnings while you train is another hurdle to cross. You know you need to do this, but you can’t afford to get it wrong. Take a step back, look at the options and be sure to invest wisely in your future.

Where do you need to get to?

Way back in 2003, the Department for Trade & Industry commisisoned a report that defined a smart home as “a dwelling incorporating a communications network that connects the key electrical appliances and services, and allows them to be remotely controlled, monitored or accessed.”

That’s as true today as it was then.

The report went on to define the six main areas of automation which are again still broadly true: 1. Environmental (heating/water, lighting, energy management, metering) 2. Security (alarms, motions detectors, environmental detectors) 3. Home entertainment (audio visual, Internet) 4. Domestic appliances (cooking, cleaning, maintenance alerts) 5. Information and communication

(phone, Internet) 6. Health (telecare, home assistance) It further noted that standalone products already existed for many of the functions and looked forward to manufacturers providing the devices, hubs and gateways to incorporate them. In other words, it was already looking towards interworking between all of these areas.

Of course, even then the DTI would have known that industry pioneers were already stepping up to the plate and providing the option of combining all of the automation functions in one system.

Now, nearly 500 manufacturers subscribe to the concept of an open protocol, a common language that their products can use to speak to each other and work together seamlessly. The idea evolved from the EIB (European Installation

Setting standards The KNX standard ensures that all certified products – from power supplies to wall switches and panels – work alongside each other, i.e. to talk to each other, irrespective of brand. Furthermore, new products will always talk to old products i.e. products are backwards compatible so that an installation will never become defunct as a manufacturer decides to discontinue products. In return for the R&D commitment, the companies have a guarantee that the software used to programme installations is under continuous development and improvement.

KNX is scalable from a house to a high-rise block of flats or offices. It will fit your customer base and will enable you to bring more functions into play – HVAC, lighting, audio, shading, security etc.

If you haven’t heard of it before, now’s probably a good time to check it out!

DOWNLOAD A FREE 'WHY KNX?' LEAFLET AT: WWW.RDR.LINK/EQ016

“I'VE BUILT A SUCCESSFUL BUSINESS ON THE PROMISES KNX KEEPS” Iain Gordon of GES Digital, who is also President of the national KNX UK Association, is encouraging installers to take part in free taster sessions offered by his members before making any decisions on the direction they're looking to take.

He says: “Whichever route to smart installation you take, KNX or otherwise, plan beyond the training. Training providers offer a menu of courses that enable you to add to your skills incrementally, but what happens outside of the classroom can be just as important.

“Who are you going to call when you want to sound out a new idea, for example? The whole KNX ethos plugs the gap and the KNX UK Association membership of like-minded people are particularly supportive of each other.”

Julian Barkes of BEMCO, which runs a busy training centre in London, adds: “We remind professional electricians that take part in our taster sessions that they already have the basic planning and cabling skills required. As such, they're more than half way there!

It tends to be the software that they need to learn, so we'll take them through it step-by-step”.

Courses range from KNX Certified Partner (Basic) through to specialist HVAC modules and KNX Advanced courses. KNX product training and ongoing technical support is often free.

A recent new concept is the Boot Camp, run by MyKNXStore, which offers a mix of refresher and troubleshooting that fits in exactly with the way integrators evolve and improve.

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training round up

CEDIA MAKES TRAINING ACCESSIBLE FOR ELECTRICIANS

A

s the business and personal lives of electricians continue to be disrupted, CEDIA is providing hours of valuable online learning to allow professionals to develop their skills and knowledge of the smart home industry. With a whole host of complimentary professional development opportunities for CEDIA members, and offered to the wider industry at a reduced rate, now is the chance to find out more about smart home technology, and how to offer it as a service to your customers.

"We're facing unprecedented challenges right now and CEDIA is here to provide valuable resources to keep our members nimble, educated, and ready for what's next," said CEDIA Global President and Chief Executive Officer Tabatha O’Connor.

"Opening our courses and white papers up for all members and providing additional ways to grow professionally is the right thing to do. CEDIA is here to help members and the industry as a whole navigate the uncertainty."

Online learning CEDIA has a number of carefully designed online courses for electricians, including live and pre-recorded webinars as well as interactive, self-paced eCourses, and lessons. These include topics such as:

Simple, Affordable, Reliable: Is Your Business Ready for this Connected Home Paradigm Shift?

Today, homeowners at all income levels have access to connected home products and information through numerous sales channels. These disruptors are forcing you to think about your business in new and unique ways. Is your business ready for these changes? This course will have you challenging the status quo and rethinking potential new business and service models to capitalise on this rapidly-growing marketplace.

Webinars To add to its online offering, CEDIA will be hosting webinars every Tuesday and Thursday on a variety of different topics to keep up your skills in the rapidly changing home integration industry.

They give electricians the chance to refresh their outlook on the industry, learn from their peers and other industry experts, and set new, long-term goals for business. There are also dedicated webinars on how to navigate your business through the pandemic, providing advice when you need it most.

Fundamentals of Home Theatre Design Study the essentials of home theatre design, including important concepts such as recommended practices, room layout, and audio/video configuration.

Podcasts New episodes of the CEDIA podcast are being made available twice a week, with topics focussing on coping with COVID-19 in day-to-day operations, supply chain issues, and remote working.

You can also take a look back int the podcast archive and brush up on your smart home knowledge with 60-minute roundtable discussions on new and emerging trends, business growth, and much more.

How Millennials Will Reshape the Home Improvement Market The millennial generation — the largest demographic group in our history — is just entering the market and promises to fundamentally reshape it. This presentation looks at how millennials make their home improvement decisions, what types of projects they are likely to undertake, and how their involvement will fundamentally reshape the industry for the next two decades.

FIND OUT MORE DETAILS AND SCHEDULES FOR CEDIA ONLINE EDUCATION AT: WWW.RDR.LINK/EQ017

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training round up

RF Solutions launches 'how to'videos

A

t the start of this year, RF Solutions announced a series of handy product ‘how to’ videos that were to be released over the next few months to help customers/installers operate an RF Solutions product. The company has now decided to release these videos early, with them all available on the RF Solutions YouTube channel.

Datasheets can be found on all product pages, providing a summary of performance and other characteristics which are regularly updated. These can also be found under the datasheets

section within the information tab on the homepage. Sample coding is also available within the downloads page.

SUBSCRIBE TO THE RF YOUTUBE CHANNEL AT: WWW.RDR.LINK/EQ018

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Keep on top of fire alarm standards

C

-TEC has launched a series of free educational CPD-certified seminars, designed to keep people abreast of the latest fire alarm standards and industry developments. The seminars can be delivered direct to your desktop or smart device by C-TEC’s friendly and knowledgeable team of Technical Account Managers with full Q&A sessions at the end.

Andy Green, C-TEC Marketing Manager, said: “If you’re working from home, our free CPD seminars are an excellent way to get up-to-speed on recently updated life-safety legislation,

industry developments and life-safety systems in general. They also allow you to earn valuable CPD points along the way."

Six one-hour seminars are available, each worth one hour of Continuing Professional Development points. All have been independently certified as being suitable for an intermediate audience, meaning novice and experienced participants are likely to benefit. At the end of each seminar, a certificate of attendance will be issued. Seminar topics are: 1. Fire alarm systems: a brief overview & the current state of the industry (1 hour CPD) 2. Fire alarm systems for purpose-built

3.

4.

5.

6.

flats & apartments: a new approach (1 hour CPD) A guide to BS 5839-6 2019 domestic fire alarm systems (1 hour CPD) EN54-23 visual alarm devices simplified (1 hour CPD) Hearing assistance solutions: the route to equality act compliance (1 hour CPD) A guide to BS 5839-9 disabled refuge systems (1 hour CPD) REGISTER FOR C-TEC SEMINARS AT: WWW.RDR.LINK/EQ019

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training round up

SUPER-CHARGE YOUR SKILLS

R

oad transport is responsible for a significant proportion of our carbon emissions – around 33% in the UK and 20% globally – and has a negative effect on air quality, noise pollution and global warming.

Despite stricter emissions standards, consumer demand for more powerful cars means that often, new models of petrol and diesel vehicles are no better than older models – sometimes even worse.

The move away from these polluting gas guzzlers is inevitable. By 2035 at the latest, the sale of new petrol, diesel and hydrid vehicles will come to an end in the UK. With car manufacturers stepping-up production to meet demand for electric vehicles (EVs), the need for a reliable nationwide charging network is more urgent than ever.

With a little upskilling, electricians are perfectly placed to deliver this vital infrastructure.

Infrastructure investment The perceived lack of EV charging points is a major hurdle for the industry. Many people would be surprised to learn that there are now more EV charging points in the UK than petrol stations, however, due to private sector investment, they tend to be concentrated in commercially viable areas.

Tech giant Siemens has just installed 24 lampost-mounted EV chargers along Sutherland Avenue in Westminster, now also known as ‘Electric Avenue W9’. Another project will see a range of EV chargers – from 7Kw fast chargers to 50Kw rapid chargers – installed in 600 Tesco car parks, representing around 15% of total UK stores.

However, investment is needed outside of London and other ‘smart cities’ if EVs are to become a viable option across the UK. In the Spring Budget, Chancellor Rishi Sunak announced his plan to readdress this balance, with a £500 million investment in the rapid charge network over the next five years. This will ensure that even in rural areas, drivers are never more than 30 miles away from a rapid charging point.

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vehicle homecharge scheme (EVHS) and similarly, £350 is available under the workplace charging scheme (WCS).

These amounts have recently been reduced from £500 to allow more people to access the grants.

EV charging point installers must be OLEV registered to apply for these grants on behalf of customers and must meet the following criteria:

Grants and training Practicing electricians and electrical engineers with experience of electrical installations, inspection and testing are the ideal candidates, and can upskill with a Level 3 Award in the Installation and Commissioning of Electric Vehicle Charging Equipment in Domestic, Commercial and Industrial locations.

The Office for Low Emission Vehicles (OLEV) offers two grants for EV infrastructure, which have both been confirmed for another year. From 1st April this year, a grant of £350 is now available towards the purchase and installation of a home charge point under the electric

1. Be a member of a Competent Persons’ Scheme (CPS) 2. Hold public liability insurance 3. Hold an EV charging point qualification (and associated electrical qualifications) 4. Be approved by the charging point manufacturer.

LCL Awards Level 3 Award in the Installation and Commissioning of Electric Vehicle Charging Equipment in Domestic, Commercial and Industrial locations meets the requirements for OLEV registration.

VIEW MORE EV COURSE DETAILS FROM LCL AWARDS AT: WWW.RDR.LINK/EQ020

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Did you know...

C-TEC’s new HAK/1 Hush-ActiV Grade C domestic fire alarm kit is now available?

Designed to lift the level of fire protection in flats, apartments and other residential dwellings, the kit includes everything you need to create a typical LD2 fire alarm system to BS 5839-6 (2019).

Key features include an attractive Central Controller with accessible HUSH and TEST buttons, comprehensive monitoring of open circuit, short circuit, battery and power supply faults and only one rechargeable 72 hour standby battery for the entire system.

Manufactured by C-TEC in the UK, the fact the Controller's HUSH and TEST buttons can be operated whilst standing at floor level also helps facilitate full compliance with the Equality Act.

HAK/1 Hush ActiV BS5839-6 Grade C Domestic Fire Alarm Kits

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1 x Hush-ActiV Controller c/w 72 hour standby battery

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PRODUCTS & BUSINESS SOLUTIONS

THE SEAL OF

APPROVAL

Deta’s Technical Manager, Andrew Pegrum explains how the company has worked quickly to ensure its fire rated downlight fittings satisfy the new NHBC requirements for recessed light fittings.

New guidelines The NHBC’s Technical Extra (Issue 25) publication states that, in relation to downlighter penetrations within intermediate floors (used within two and three storey new-build homes) constructed with engineered floor joists:

differently under fire conditions. This, at least for the present, has resulted in the need for fire rated downlights to be tested in each manufacturer’s I-joist specification in order that test evidence can be provided to match with the floor construction installed.

“fire resistance downlighters and fire hoods are only deemed to be acceptable if test evidence supports their use in a similarly engineered joist floor build up.”

Successful testing Deta’s immediate response was to implement an extensive testing programme to test fire rated downlights in floor constructions using engineered joists from other leading manufacturers.

Having worked in co-operation with several leading engineered joist manufacturers, as well as house building developers, Deta has been able to demonstrate its fire rated downlights satisfy the new guidelines.

Successful testing has been carried out with leading fire testing laboratories in the UK and across Europe. These test results have now been shared with the NHBC, which has approved the installation of Deta’s current (L1680/2 and L1690/2) and new (L1701) fire rated downlights within 30 minute intermediate floors using the following constructions:

On this basis, Deta had firmly considered that its fire rated downlights had met this criteria, following successful testing of its fire rated downlights in an engineered floor construction with one of the major I-joist manufacturers. Consequently, Deta had considered that its fire rated downlights should be qualified for installation and approval within any similarly engineered I-joist floor construction.

The NHBC subsequently advised that since the specification of I-joists and floor constructions differ between manufacturer and by installation, they don't necessarily consider all I-joists and floor constructions to be similar. This creates a wide range of variables which calls for either an assessment to be provided by a suitably qualified fire engineer or for each manufacturer’s I-joist to be tested with fire rated downlights.

Seeking assessments can be difficult as it is understood that different manufacturers’ I-joists may behave

● James Jones I-Joist ● Metsa Wood I-Joist ● Staircraft I-Joist ● Steico I-Joist ● Solid Timber Joist

Deta’s fire rated downlights can be installed in these floors in line with the test floor specification, without the need for noggins or for fire hoods to be fitted.

The company is continuing the programme further to test its downlight fittings in floor constructions using engineered joists from other manufactures and is working in close partnership with them to secure further approvals from the NHBC. A comprehensive set of NHBC approvals Ordinarily, the test programme to gain NHBC approval for fire rated downlights in multiple I-joist floor constructions would have taken many months to complete. Deta, however, has managed to deliver a successful outcome and provide results that the NHBC has been able to approve in a matter of weeks.

DOWNLOAD A DETA FIRE RATED DOWNLIGHTS FACT SHEET AT: WWW.RDR.LINK/EQ022

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PRODUCTS & BUSINESS SOLUTIONS

EXTERIOR MOTIVES Exterior security lighting can provide a simple-to-install and affordable way of enhancing home and business security. Neil Baldwin, Managing Director at ESP, looks at some of the options available.

F

or those clients with no external security measures in place to protect their properties, the installation of a simple camera and security floodlight system could be the answer to deterring unwanted intruders.

There are a range of products available, such as a complete, all-in-one, energy-efficient, high-performance LED PIR floodlight system.

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A combined security camera and LED floodlight like ESP’s GuardCam LED, for example, is suitable not just for securing domestic properties, but also for areas around offices and industrial or agricultural units. These systems are straightforward to install by simply connecting to the mains power, fixing to the wall and setting the time and date via the supplied SD card. Once switched on, it will detect an intruder, floodlight the area, and initiate a HD video recording directly to an internal SD card. If selected, an audible warning can be delivered, and users have the ability to record their own warning message.

For a more sophisticated solution there are Wi-Fi versions available that offer the additional benefit of remote monitoring via smartphone or tablet. The GuardCam Deco, for example, is a combined Wi-Fi security camera and LED floodlight system, which has been designed with ease of set-up as a key feature. The remote monitoring function via smartphone or tablet is available using ESP’s specially developed ESP Smart App. With a built-in camera that offers full 1080p HD live viewing and recording, this

type of security camera and floodlight system is an ideal all-in-one solution for domestic and commercial applications.

On approaching the unit, it will detect the intruder with proven PIR technology at a distance of up to 10m from the unit. It will floodlight the area, initiate a video recording and provide the user with an option to deliver a two-way audio message or activate the in-built alarm warning. It also features an adjustable 16W high-intensity LED security lamp (3000k colour light and 800 lumen) which you can remotely dim or turn on/off via the App. It will record up to 200, twenty-second video sessions onto the supplied 8GB storage, which is expandable up to 64GB.

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GuardCam LED Wi-Fi has the option to deliver motion activation notifications via the App whilst recording the activation. The App also allows recordings to be accessed.

For other projects, it may be that exterior lighting is required simply to light up areas to the front, back or side of a property to make access around these areas safe during the dark. If this is the case there are a number of options for a good quality LED floodlighting provision.

Today there are slimline low energy LED floodlights available that are meeting the growing trend for a stylish, more aesthetic lighting solution.

A range like ESP’s NightHawk Plus offers a choice of wattage/lumen outputs to ensure a solution for a broad range of applications – from small walkways, through to large gardens and work yards.

The range offers 10W/800 lumen, 20W/1600 lumen, 30W/2400 lumen and 50W/4000 lumen fittings, with each one available as a straightforward floodlight and as a PIR version.

The standard fitting is switched on and off manually or can be wired into an external device – such as a digital timer – and is suitable where control of the lighting system is preferred. The built-in PIR sensor fitting provides added security, and comes with predefined settings – range, Lux level and the trigger time duration parameters.

The fittings are simple and straightforward to install using the adjustable bracket supplied. They each offer a 4000K colour temperature which produces a cool white output and they feature a textured diffuser to help prevent an intense glare. Each product in the range is available in black or white to maximise the choice and appeal to suit all exteriors. Additionally, the robust housings are IP65 rated.

Even where an existing external light or security light might be in place, chances are that it is old, corroded and out of order. Yet, a fully functioning, replacement solution can be installed in no more than 15 minutes and without the need for additional cabling.

This makes it an easy solution for installers to sell to customers.

DOWNLOAD THE LATEST ESP SECURITY CATALOGUE AT: WWW.RDR.LINK/EQ023

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PRODUCTS & BUSINESS SOLUTIONS

BATH-ROOM FOR A LITTLE AONE? In this article the team at Aurora Lighting help us to understand why making a ‘smart’ bathroom is a simple task, if you have the right equipment.

I

f your client is looking for a bathroom refurb, why not suggest smart lighting and give them the opportunity to create different moods at any time of the day?

Aurora’s AOne is a good example of an affordable smart lighting system with a vast range of lighting, control, power and sensing products that can transform living spaces by creating a variety of moods and scenes through different lighting and control options. By installing the AOne into a bathroom, ensuite or downstairs toilet, homeowners can create mellow lighting for evenings and candle-lit baths or schedule it to gradually come on early in the mornings.

The benefits of bathroom installation Downlights are becoming increasingly popular for modern bathrooms. Aurora’s

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AOne mProZX has the option to be used with an IP rated bezel, and therefore can be installed in rooms that are likely to experience moisture. The tuneable white colour feature allows lights to be scheduled to cool white in the morning and warm white in the evening.

To enhance the mood in a bathroom or toilet, especially if a bath is desired after a long day at work, RGB IP rated LED strip can be used to create atmosphere when placed behind a mirror, picture, shelf or along a bath rim. The opportunities to create a unique setting are endless. The AOne RGB + Colour Tuneable Controller plus an AOne Hub is all that’s required to make the strip smart.

In the evenings or when the bathroom has no windows, the PIR/Door Window Sensors can be used and scheduled with the desired lighting for use at certain times. Suitable for use in Zone 3 of the bathroom, they can automatically sense any motion or a door opening, enabling lights to immediately come on when people enter the room. This is ideal for when anyone needs to use the bathroom or ensuite in the middle of the night, as they don’t need to search for a light switch. Reduced brightness can be scheduled so others are not woken up at the same time.

FREE AONE INSTALLER TRAINING COURSE Aurora Lighting is running free training sessions for electricians and installers who would like to learn more about the increasingly popular AOne Smart Lighting System. There are currently two courses running – the Aurora Smart Installer Foundation and Intermediate Course.

GET MORE DETAILS AT: AURORALIGHTING.COM

VIEW THE AURORA AONE CATALOGUE AT: WWW.RDR.LINK/EQ024

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Products IN PRACTICE

Ovia bulkheads are kings at the Castle Castle Rock Edinvar, a registered Scottish Charity, is one of Scotland's leading Housing Associations; it owns and manages over 8,000 homes and works with over 8,000 customers across eight local authority areas.

Recently, a programme to upgrade all of its low rise properties in Edinburgh and the surrounding regions has benefited from the specification of Inceptor Evo Bulkheads, from Scolmore Group company Ovia, which are providing cost-efficient solutions to a range of lighting applications.

A total of 66 Evo Bulkheads have already been installed as part of an overall refit of the premises and are now the lighting product of choice for all lighting requirements due to the flexibility of installation, minimum disruption to the building fabric and the value for money they offer for the overall cost of the project.

Alec Macindoe, a Manager on the project, commented: “We found the Inceptor Evo to be an adaptable and

58 May 2020 PROFESSIONAL ELECTRICIAN

stylish product with great innovations and technology built-in at a value-for-money price point. We measured it up against many competitors prior to specifying it across all our housing stock in and around Edinburgh and found it to be the equivalent or better than all those benchmarked.

“When the fitting needed specific alterations for bespoke issues, we also found Inceptor Evo to be simple to adapt and in a reduced time versus conventional routes.”

With most other bulkhead products, the installer will need to first unscrew the diffuser and then the gear tray, fix the base to the wall, terminate the conductor, re-attach the gear tray and re-screw the diffuser. Ovia has taken away the need for time-consuming and unnecessary screws by integrating the control gear and light source within the diffuser and adding a Flow connector. The installer, therefore, simply removes the diffuser, fits the base to the wall/ceiling, wires the conductor

into the flow connector and secures the diffuser in place.

The IP65-rated Inceptor Evo is available in two formats, Circular and Eye-Lid, with each format offered in four different options – Standard, Emergency, Microwave Sensor and Emergency/Microwave Sensor combined. This provides contractors and installers with a range of easy-to-install LED bulkheads, suitable for a variety of domestic and commercial applications including walkways, corridors, stairwells and communal areas, within public areas such as schools, offices, and shopping malls and urban spaces.

Castle Rock Edinvar selected the microwave sensor model to satisfy its requirements.

FOR MORE INFORMATION ON OVIA'S INCEPTOR EVO BULKHEADS, VISIT: WWW.RDR.LINK/EQ025

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sponsored by www.electricalcharity.org

AICO HYDE GROUP THORN LIGHTING GOL CENTRE, CARDIFF Thorn Lighting has provided a full LED refurbishment for the pitch lighting at Cardiff’s Gol Centre. Initially, the brief was to light one of the pitches so that the results could be assessed before commencing work on the rest of the site – it goes without saying that the lighting solution that Thorn provided proved incredibly popular and the refurbishment was completed for the rest of the installation. The existing 400W metal halide fittings highlighting the eleven pitches were constantly blowing out, required lamp replacement every three months and didn’t provide bright enough illumination for the pitches. Thorn’s Areaflood Pro floodlights mounted on 8 metre columns proved to be the perfect solution for the application, averaging around 100 lux where previously less than 50 lux was achieved in the centre of the pitches.

DOWNLOAD THORN’S PRODUCT CATALOGUE AT: WWW.RDR.LINK/EQ026

The Hyde Group is utilising Aico’s Ei1000G SmartLINK Gateway to provide a solution-focused approach to asset management that assures the safety of tenants. In order to mitigate risk and monitor the alarm systems within its properties, Hyde collaborated with Aico to provide a solution that was cost-effective, met the requirements and ensured minimal disruption for tenants.

The installation of the new Aico SmartLINK Gateway was recommended to provide real-time data insight into the fire alarm system, reporting events such as alarm head removals and fire alerts. Each of the properties have now been fitted with an Ei3024 Multi-Sensor fire alarm and Ei1000G Gateway, giving Hyde a proactive approach to fault-finding, defining any trends in alarm activations and maintenance requirements, while drastically minimising the issue of property access.

GET MORE PRODUCT DETAILS AT: WWW.RDR.LINK/EQ027

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PRODUCTS ROUND UP

SNICKERS WORKWEAR Stretch Work Shorts

CK TOOLS Insulated T-Handle Hex Keys A good quality set of T-Handle Hex Keys can make all the difference when it comes to completing a whole range of tasks quickly and easily. Following recent market research and valuable feedback from professionals, C.K has introduced more product sizes to its popular Insulated T-Handle Hex Key (4mm). These include the innovative C.K 5-piece Insulated T-Handle Hex Keys Set (T4422 SET – 3, 3.5. 4, 5 and 6mm), plus two of the most frequently used Insulated T-Handle Hex Key sizes – 3mm (T4422 03) and 3.5mm (T4422 035), which can be purchased separately. The 5-piece set comprises the most requested insulated T-Handle hex key sizes in one handy set. Ideal for those needing a range of sizes to complete their work, the set is VDE approved – individually tested to 10,000V for safe working up to 1,000V, features premium quality S2 steel blades, tempered and hardened for exceptional strength and durability, along with a dual component, ergonomic handle for ease of use.

GET MORE DETAILS AT: WWW.RDR.LINK/EQ028

These new AllroundWork and FLEXIWork Stretch Work Shorts are great for working in the warmer months. Delivering superior flexibility and comfort, the lightweight garments come in a body-mapping design and a range of new colours, including hi-vis options. Made from a self-ventilating stretch fabric with Cordura reinforcements for all-round mobility and durability, they’re packed with comfort and functionality and specially designed for the fast-paced professional who’s always on the go.

GET MORE DETAILS AT: WWW.RDR.LINK/EQ029

UNICRIMP CXT Brass Glands Unicrimp has extended its glands range to include CXT brass glands. This is to meet the growing requirement from customers looking to source stranded armour cable instead of steel wired armour (SWA), which the CW and BW glands cover. CXT brass cable glands are designed for use with all types of braided armour SY, CY and other flexible wire braid or braid armour cable where there is a need for clamping of the wire braid for electrical continuity and/or mechanical retention purposes. Examples of where this type of cable application could typically be found include multicore control cable infrastructure, production lines, conveyors, server rooms, machine shops and mobile equipment. The new glands have an IP66 rating allowing them to be used with all types of braided armour cables. They're also BS 6121-1:2005 compliant and suitable for indoor and outdoor use.

GET MORE DETAILS AT: WWW.RDR.LINK/EQ030

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ESP HDview CCTV Tester ESP’s versatile HDview test monitor will provide installers with the means to install, test and troubleshoot CCTV camera systems.

The 4” touchscreen HD CCTV test monitor allows a single installer to accurately set up any CCTV camera and is compatible with ESP’s IP and analogue CCTV ranges. The unit connects to the camera during installation to display an impressive image on the 4” full colour screen, while powering the camera directly from its POE or 12V DC supply. The test monitor is ideal for use during an on-site evaluation to aid with camera selection and any troubleshooting – providing the client with a clear example of what viewing angles and coverage can be achieved when selecting a CCTV system. The product provides up to seven hours constant working time when fully charged, allowing plenty of time to perfect aim, zoom and focus. It can be wrist-mounted or handheld, according to the installer’s preference.

DOWNLOAD THE DATA SHEET AT: WWW.RDR.LINK/EQ031

SCHNEIDER ELECTRIC Lisse Illuminated Frame Schneider Electric's Lisse illuminated frame provides a subtle blue glow around a light switch to help with locating it in the dark. The illumination is particularly useful in locations such as children’s bedrooms, long hallways, care homes, hospitals and hotels. The light is provided by two 1mA LEDs mounted into a clear frame, which helps to radiate the light around the whole perimeter of the switch. The frame can be installed behind any one-gang Lisse White Moulded or Lisse Screwless Deco light switch or dimmer.

GET MORE DETAILS AT: WWW.RDR.LINK/EQ032

ARMEG 13 Piece Twister Electrician's Set Armeg is aiming to cause an impact this spring with the launch of its new 13 Piece Twister Electricians Set, which is fully rated for impact drivers. The set features drill bits suitable for multiple materials and in the most common sizes. Further, the set has been rigorously tested and given Armeg’s Twister impact rated seal of approval. The 1/4” shanks all meet ISO 1173:200 standards and are speedily and easily interchangeable. The robust 120mm long Nail-Proof Stubby WoodBeaver is ideal when working with nail embedded wood, with a 125mm extension also available. The Acceler8% Holesaw is the ideal tool for producing fast and easy holes in sheet steel. There’s a range of multi-material drill bits included for fixings holes, plus three sizes of HSS Cobalt Drill Bits which last up to ten times longer than standard HSS drills. Mag-Bits feature an integral mag-collar which locks onto the fastener, holding it securely in place.

GET MORE DETAILS AT: WWW.RDR.LINK/EQ033

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PRODUCTS ROUND UP

VEXBOX Intumescent Vexbox

HAMILTON LITESTAT 2020/21 Online Catalogue Hamilton Litestat’s 2020/21 catalogue is now available online, illustrating Hamilton’s comprehensive product offering that makes it a one-stop-shop for all your wiring needs. New for 2020 is the Guardian consumer unit range, which has a ten-year guarantee and the full support of Hamilton’s UK-based team for on-site installation questions. Get a design update with Hamilton’s new range of Wide Rocker Switches, or the Hartland G2 collection, a value engineered upgrade to one of the most popular box-fix designs, providing a screwless plate at a cost-conscious price. Another new addition is Hamilton’s Wireless Audio range: WSA50 Wireless Streaming Amplifier, 6” 80W stereo ceiling speakers, Appio wireless active speaker and Oyster Wireless Audio Receiver. The intuitive catalogue illustrates all available plate finishes and contains configuration information and part numbers.

VIEW THE ONLINE CATALOGUE AT: WWW.RDR.LINK/EQ034

Recently released to market, the Intumescent Vexbox system is based on the same principle as the highly successful original version of Vexbox. Both systems can form either a twin or single profile and vary in extension from 5 - 35mm.

Therefore, electrical boxes which have been set too far back into the wall can be extended to close the gap between the front of the box and the plasterboard, giving the plasterer an edge to work to, and providing for a superior quality wall finish. At the same time, if the intumescent version of Vexbox has been installed, which has been fully tested in accordance with EN1364/1, this enables the installation to comply with Part B of the Building Regulations by re-instating the fire-proof integrity of the wall. In a fire situation, the intumescent material expands to approximately 14 times its original volume. Combined with the patented "wrapping of tape" to prevent the flow of char into the wall, a dense barrier of carbon is formed which prevents the passage of fire.

GET MORE DETAILS AT: WWW.RDR.LINK/EQ035

FLUKE 175/C25 Kit Offer Until 30th June and while stocks last at its authorised distributors, Fluke UK is offering the Fluke 175/C25 Kit. The kit includes the popular Fluke 175 Digital Multimeter (DMM) with a free C25 soft carrying case at a signifcant saving over the recommended retail price of the sum of the individual products. The Fluke 175 has the baseline features needed for troubleshooting and repairing electrical and electronic systems from problems arising in industrial electrical and electro-mechanical, and HVAC, infrastructure.

VIEW THE OFFER AND MORE SEASONAL PROMOTIONS FROM FLUKE AT: WWW.RDR.LINK/EQ036

TEST INSTRUMENT SOLUTIONS Infrared Medical Thermometer The TIS MEDIIR Infrared Medical Thermometer is a simple and non-invasive way to measure an individual's temperature, ideal for pinpointing high temperatures up to 42°C or 108°F. This product uses an infrared induction function, not a laser beam, which produces a fast and accurate measurement.

Results are displayed within seconds, enabling multiple testing without any risk of invasive procedures or injury and without contact, greatly reducing the risk of virus spread. The MEDIIR Infrared Medical Thermometer is ideal for measuring the temperature of sleeping children, while many organisations are using this product to identify potential COVID-19 Virus carriers in order to slow down the spread of the disease. Key features include a resolution of 0.10°C, a medical temperature range of 32°C – 42°C or 89°F – 108°F, a response time of one second, data hold, back lit display, low battery display and a measurement distance of 1cm – 5cm. Further, the thermometer is safe and simple to use with no risk of injury to the person being tested. The product conforms to EN61326.

GET MORE DETAILS AT: WWW.RDR.LINK/EQ037

62 May 2020

PROFESSIONAL ELECTRICIAN

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KNIPEX Electrician’s Pliers KNIPEX has wide a range of electrician’s pliers available, designed for gripping, cutting, stripping and crimping. The range includes pliers for cable work, gripping and bending wire. With precision cutting edges which have been additionally induction-hardened, the pliers’ cutting-edge strength is perfect for cutting medium hard and hard wire. Featuring stripping holes and the ability to crimp wire end sleeves, this is the perfect tool for electrical contractors, replacing the need for several pairs of pliers with just one tool. Model 13 05 160 T, the Tethered Tool version, completes the range. This model is attachable, so is perfect for electricians who work at height.

GET MORE DETAILS AT: WWW.RDR.LINK/EQ038

CED Spelsberg Junction Boxes Spelsberg is well known for providing a range of high quality junction boxes that are quick and easy to install, deliver long service life and offer ease of maintenance. Manufactured in Germany, all junction boxes have relevant IP ratings, are VDE approved and halogen-free. CED Electrical Group stocks and supplies six series’ of Spelsberg junction boxes, including the renowned A-Box range of outdoor pvc boxes for commercial and industrial applications, the A-Box Mini 25 series designed for confined spaces and the HP-Box series of stepped nippled junction boxes. The Q-Box range with top cable entry for quick installation, the I-Box series with self-inlet membranes, plus the SD-Box range with a safe opening and closing mechanism, complete the range.

GET MORE DETAILS AT: WWW.RDR.LINK/EQ039

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PRODUCTS ROUND UP

IDEAL INDUSTRIES EMEA Twin & Earth Cable Stripper

SCOLMORE Additional Printed Modules Scolmore has added three new printed modules to its standard range, following an increased number of requests from customers. Modules etched with ‘Hot Tap’, ‘Wine Cooler’ and ‘Warming Drawer’ – previously available as bespoke orders – are now part of the growing printed module range which totals 17 and includes some of the most popular options – ‘Dishwasher’, ‘Cooker Hood’, ‘Washing Machine’ and ‘Fridge Freezer’. The printed modules are available in all the GridPro and MiniGrid module finishes. The module etching is undertaken using a specially acquired laser printer, which produces a precise, permanent, fine marking effect and offers flexibility to suit large volume orders or for customised jobs. With this in-house facility, Scolmore is able to offer a fully bespoke service to customers.

DOWNLOAD THE GRIDPRO CATALOGUE AT: WWW.RDR.LINK/EQ040

This Twin & Earth cable stripper is designed to make stripping of insulated flat cables faster and more consistent, with no risk of nicking the wire. Engineered and manufactured in Germany, the robust, ergonomic tool has been designed specifically for use with twin and earth cables. The self-adjusting blades offer an unlimited stripping range for fast and accurate removal of the insulation. Capable of removing the outer sheath in one swift operation, then stripping the inner cores with a second action, the tool speeds up installations without compromising on quality and consistency.

The ergonomic design makes this Twin & Earth Stripper easy and comfortable to use with minimal pressure required to complete a clean cut for any flat cables between 0.75 and 2.5mm2 and up to 12mm wide. Users simply insert the required length of cable into the tool and squeeze the handles together. The open-throat design allows an unlimited strip length for both the outer sheath and the inner wire sheathing.

GET MORE DETAILS AT: WWW.RDR.LINK/EQ041

SOLID GEAR Safety Shoe Range With a wide range to choose from that integrates the type of modern technical designs you’ll find in outdoor and athletic footwear, Solid Gear safety footwear combines quality materials for comfort, protection and durability.

There’s a host of first-to-market features like GORE-Tex Surround Technology for unrivalled and all-round breathability. Plus, ETPU sports footwear performance that delivers unrivalled footbed energy return that really puts a spring in your step. Added to the Vibram outsoles and Cordura Rip-Stop fabric in other styles, you’ll get rugged protection all day long. What’s more, the GORE-Tex Fabric Technology also makes the footwear water repellent and waterproof to keep your feet dry. Added to which, the unique BOA Closure System on certain styles, distributes the pressure evenly across your feet to ensure a glove-like fit.

VIEW THE SOLID GEAR MATERIALS AND SPECS GUIDE AT: WWW.RDR.LINK/EQ042

OVIA U-Lite Slimline Luminaire The U-Lite range of slimline linear LED luminaires from Ovia has been designed and developed as the ideal retrofit replacement for single and twin-lamp fluorescent fittings.

With 24 variants in the U-Lite range, Ovia is offering a product that is suitable for every market and for numerous applications. Installed into walls and ceilings or suspendable, they come in standard, microwave sensor and emergency models, and in three different lengths – 1,200, 1,500 and 1,800mm. Wattage ratings range from 21W to 72W Cool White (4000K) and offer a lifetime of 50,000 hours (L70). Made from non-corrosive polycarbonate, each unit has an IP rating of IP65, a tough impact protection rating of IK08 and comes supplied with a five-year warranty. Wiring and installation of the U-Lite is easy using the piano-type 5-pole push fit terminals.

WATCH A U-LITE RANGE VIDEO AT: WWW.RDR.LINK/EQ043

64 May 2020

PROFESSIONAL ELECTRICIAN

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CAUGHT ON

C A M E R A Andy (via Facebook): Surely it would have been easier and faster to do it correctly in the first place? When you think that you've seen it all!

SOCIAL SNAPS!

Lee Williams (via Facebook): This picture isn't a fake – this was found during an EICR!

Mike Cash (via Twitter): Here we have bare brass terminals in the space between a metal fitting and the ceiling!

Point Electrical (via Twitter): I think this mouse and junction box have both seen better days.

Luke Palmer (via Facebook): Yes, they were still live...!

Bristol Sparky (via Instagram): There’s a first time for everything!

This customer had just moved into a new house and asked me to check out a socket for him...!

PROFESSIONAL ELECTRICIAN May 2020 65

066 PE MAY 2020 INDEX_Layout 1 07/04/2020 09:18 Page 66

ADVERTISER INDEX Aico Ltd............................................... Page 36

Makita (UK) Ltd................................... Page 17

ALL LED Ltd ........................................ Page 10

Metrel UK Ltd .................................... Page 30

Aurora Ltd .......................................... Page 59

ML Accessories Ltd ...... Inside Front Cover

Bott Ltd ................................................ Page 41

National Ventilation Ltd .................. Page 57

Bromleighs.......................................... Page 61

Ovia Lighting ..................................... Page 27

Castline Systems .............................. Page 57

RF Solutions Ltd ................................ Page 51

CED...................................................... Page 46

Schneider Electric......................... Pages 8,9

Chint Europe (UK) Ltd ..................... Page 45

Scolmore International Ltd ............ Page 24

C-TEC Ltd ........................................... Page 37

Seaward Electronic Ltd................... Page 42

Cudis Ltd ............................................ Page 55

Selectric .............................................. Page 27

DANLERS Ltd ..................................... Page 61

Test Instrument Solutions Ltd........ Page 14

Dickies ................................................ Page 48

The Focus Training Group ............ Page 60

Electrorad UK Ltd................................ Page 7

Timeguard Ltd................................... Page 33

Elite Security Products Ltd ............ Page 49

TSB Bank plc...................................... Page 13

Forum Lighting Solutions Ltd........ Page 24

Tysoft Software Ltd.......................... Page 57

Hamilton Litestat ............................... Page 21

UNICRIMP Ltd ................................... Page 45

Hollycroft Software Ltd................... Page 60

Vent-Axia Group Ltd........................ Page 46

Hultafors Group UK Ltd..................... Page 4

Vex Box Ltd ....................................... Page 63

IDEAL INDUSTRIES EMEA .............. Page 18

V-TAC UK Ltd.............. Outside Back Cover

Logic4training.................................... Page 57

Walraven Ltd ..................................... Page 23

Lux General Lighting Ltd................. Page 51

Wise Controls.................................... Page 63

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WANT TO KNOW MORE? TO HELP YOU FIND OUT MORE ABOUT ANYTHING YOU’VE SEEN IN THIS ISSUE, WE’VE INTRODUCED A NEW DIGITAL INFORMATION SERVICE. RDR.LINK IS DESIGNED TO GET YOU FASTER ACCESS STRAIGHT TO THE EXACT ONLINE PLATFORM THAT HAS THE SPECIFIC INFORMATION YOU WANT. FROM VIDEOS TO TECHNICAL GUIDES, PDF’S TO PODCASTS – RDR.LINK WILL TAKE YOU STRAIGHT THERE.

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