BS 7671: 18th Edition Wiring Regulations – Study when you want and pass your exam when you're ready…
Permitted 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 for cables that are installed in walls … Read more
The most often used cable within domestic installations is the 70 deg thermoplastic PVC twin and earth which has a CPC built into it whose size has already been calculated using the formula method from regulation 543.1.3 and the normal sizes of the CPC in each cable are… 1.5mm2 T&E cable has a 1.0mm2 CPC … Read more
This post highlights the changes made to BS7671:2018 that were introduced by Amendment 1: 2020. For more information and training relating to ‘Electric Vehicle Charging Installations’ or any electrical installation training matters please feel free to contact us… Introduction… Amendment 1 has been introduced this year to amend Section 722 of BS7671:2018 ‘Electric Vehicle Charging … Read more
The 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 to be re-boarded once the electrics and … Read more
There 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. Problems can arise when the RCCB within … Read more
In order to provide a snapshot on its condition a Periodic inspection and test is completed on an existing electrical installations and a judgement is made by the peson conducting the inspection and test as to whether or not the installation is in a satisfactory condition and can be used safely. The results of inspection … Read more
Socket 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 load board or a combined 32A/30mA RCBO … Read more
When 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 together using a 3-core and CPC PVC … Read more
Isolation 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 energy. Emergency Switching: An operation intended to … Read more
…using your online 18th Edition course here at the-regs.co.uk Follow these steps and join our ever growing list of exam passers here at the-Regs… To get started… We have two online 18th Edition courses for you to choose from. Our most popular is the Full 18th Edition course. This covers the whole of the 18th … Read more