To become an approved domestic electrical installer who can self-certify their own work you will need to be a member of a Competent Person’s Scheme. Published in 2020 and in effect from September 2021 the IET Electrotechnical Assessment Specification sets out the minimum requirements to be met by
READ MOREHow to connect a 2-way lighting circuit… When a single light needs to be switched on and off from two positions such as on stairs or landings a two-way lighting switch arrangement can be used. The most common and easiest way of doing this is to link both
READ MOREPermitted cable routes / zones BS7671:2018 I’ve recently been asked a question by one of our 18th Edition students and think it would be useful to see it here. ” My inquiry is quite simple really, but I am a little confused as to what is acceptable practice
READ MOREThe often misunderstood regulation concerning fires and cable supports… Recently I was speaking to a builder who had been refurbishing an old terraced house and he was telling me about the electrician who completed the rewire. The ceilings on the ground floor had been removed but were going
READ MOREThere are Two Types of Residual Current Device… Residual current operated circuit breaker without integral overcurrent protection – an RCCB Split load consumer units usually contain two RCCBs each protecting multiple circuits within the consumer unit with overload and short circuit protection provided via the individual circuit breakers.
READ MORESocket Rings: Three separate ring circuits are often used for sockets around the home, one upstairs, one downstairs and one for the kitchen. Each separate ring is fed from the consumer unit via an individual 32A type B circuit breaker and a separate 30mA RCCB via a split
READ MOREWhen a light needs to be switched on or off from two separate positions which is usually the case on stairs or landings, a two-way lighting switch arrangement can be used. The most common and easiest way of doing this is to link both of the light switches
READ MOREIsolation and Switching in Domestic Kitchens… Let’s take a look at a few definitions first… Isolation: Function intended to make dead for reasons of safety all or a discrete section of the electrical installation by separating the electrical installation, or a section thereof, from every source of electrical
READ MOREWithin older domestic installations that complied with earlier versions of the Wiring Regulations the main bonding and supplementary bonding should be in place. However, within a new installation due to the introduction of RCDs and new Wiring Regulations it is now possible to omit both main and supplementary
READ MOREWhy on a TN-S earthing system is the maximum Ze given as 0.8 ohms by the supply authority when it’s often protected by a BS 88-3 100A fuse which has a maximum Zs of 0.38 ohms? This maximum value for Ze of 0.8 ohms for a TN-S earthing
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