Whether it’s for overload, fault, fire or overvoltage protection, isolation or just control switching. There is still an exception to omit RCD protection where, other than BA1, BA3 or children (BA2, BA3) and mobile equipment (not exceeding 32 A) for use outdoors, a suitably documented risk assessment determines that RCD protection is not necessary. This article will guide you through some all-important 18th edition exam tips that will help you through the final examination. Candidates must be aware that ‘Initial Verification’ is only practicable in the first instance of electrical installation.

Chapter 46: Isolation and switching is all about turning things off whether it’s isolation for maintenance or to functionally control a circuit or in an emergency.

concerning earthing requirements for the installation of equipment having high protective conductor currents. Developing new, and amending existing regulations ahead of the next edition of the Wiring Regulations is a rigorous process. Therefore, if you want to be sure you will pass it makes sense to aim for a higher pass mark of at least 70% and above. Current-carrying capacity and voltage drop for busbar trunking and powertrack systems (informative).

But if you’re fully up to speed on the last Regs book, you may feel confident enough to focus your revision on the changes that have occurred this time around. has been deleted, also changes have been made to the notes in particular the one concerning where equipment to be used is not covered by a British or Harmonized Standard. As such problems and questions may not always be worded exactly as you come across them in the book. What BS7671 does and does not apply to (Chapter 11 ‘Scope’) along with the purpose of the regulations (Chapter 12 ‘Object’) and the basic principles that all electrical installations should adhere to (Chapter 13 ‘Fundamental Principles’). This essential update to the IET Wiring Regulations will form the national standard to which all new electrical installations and additions, and alterations to existing electrical installations in the UK are to comply.Today, 28th March 2022, sees the publication of Amendment 2 to the 18th Edition of the Wiring Regulations. This section outlines the relevant tests that must be performed on any installation prior to it being energized. The Standards for Conversions and Renovations provide guidance on the type of project that will be acceptable to NHBC, the scope of the survey(s) and work that will be required.