Recommended frequencies of Periodic Inspections (Wiring test) Commercial Installations - 5 years Industrial Installations - 3 years Building open to the public - 1 year
Domestic Installations - 10 years or change of occupier The rules on electrical safety are less specific than for gas and furnishings when letting out property. The landlord is acting as a supplier of electrical equipment, including the electrical wiring in the property as well as any electrical appliances provided for tenants' use. Landlords have a legal duty to ensure that equipment is "safe". It is therefore recommended(including periodic report) that appliances should be annually PAT tested (portable electrical appliance safety test) wiring of the flat or house should be checked at least every 5 years to obtain a Periodic Inspection Report. Although
mandatory BS7671 also suggests testing on change of occupancy.