Keeping Up to Date With The 18th Edition…

The 18th Edition Wiring Regulations (BS 7671) is the most important day to day non-statutory document for electricians as it provides guidance on complying with the legal requirements of the Electricity at Work Regulations 1989 as well as the Health and Safety at Work Act. New or alterations to existing regulations within the 18th Edition … Read more

Introducing, 18th Edition +Amendment 2

BS7671:2018+A2:2022 Let’s take a quick run through the new 18th Edition Wiring Regulations book, which includes Amendment 2 that was introduced in March 2022, BS7671:2018+A2:2022. We’ll go into more detail and get you ready to pass your 18th Edition exam when we go through the book together fully in your 18th Edition online course at … Read more

Permitted Cable Zones / Routes

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

BS7671:2018 & Amendment 1:2020

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

Omission of Main and Supplementary Bonding

Within 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 bonding in a new installation. Omission of … Read more

Current carrying capacity (Iz) of Twin and Earth (T&E) conductors…

As current flows through a conductor due to it’s electrical resistance it produces heat. If the current in the conductor increases then the heat also continues to rise and eventually we could reach a temperature which will cause permanent damage to the cable or possibly even a fire within the installation. In order to prevent … Read more

RCD Protection in Domestic Installations

Within domestic installations there are numerous regulations within BS 7671:2018 concerning additional protection through the use of 30mA RCDs… 411.3.3: Gives us additional protection via a 30 mA RCD for ‘general’ sockets, both indoor and outdoors. 411.3.4: Again 30 mA RCD additional protection for all lighting circuits. 522.6.202: Cables buried in a wall less than … Read more

SPDs Where and When?

Within the 18th Edition as far as SPDs and protection against transient overvoltages are concerned there is no need to provide protection for single dwelling units (safe to assume they mean domestic, although there is no definition for a dwelling unit within Part 2 which I think is an oversight). There’s also a mention of … Read more