Requirements for Electrical Installations, IET Wiring Regulations, Eighteenth Edition, BS 7671:2018+A2:2022 (Electrical Regulations)

Product Information

Regulation, 702.414.3, concerning SELV and PELV, has been introduced. Section 703 - Rooms and cabins containing sauna heaters The two hour test times gives you a full two minutes for every question, although you can spread this time out as you wish. With appropriate preparation, study, and following the tips in this post, you will be well prepared to pass the 18th Edition exam. A new Regulation 514.16.1 has been introduced requiring a label to indicate the presence of SPDs. However, there is an exception for domestic (household) premises or similar. Chapter 53 - Protection, isolation, switching, control and monitoring

As well as more minor changes to Chapters 3.3, 5.1, 6.2, 6.4, 6.7, 6.8, 9.5, the following major technical changes have been made to this edition of the Standards: There is a recommendation to install AFDDs (Arc Fault Detection Devices) in certain circumstances, to protect against overheating and potentially fire caused by arc faults in electrical equipment. There are 38 separate rules within the COLREGS although some of the regulations are only mandatory for larger vessel, in principle they do apply to all vessels. The first step to answering a real life problem or any exam question for that matter is to ask yourself. ‘What part of the book does this relate to?’ A note has been added clarifying that where non-metallic pipes, e.g. plastic, enter the building and are then connected to metallic pipes within the building, the metallic pipes within the building do not normally require protective bonding as they are unlikely to be extraneous-conductive-parts. Reference to insulating sections has been removed.The IET’s (Institute of Engineering and Technology) Requirements for Electrical Installations goes by many aliases; the 18th Edition, BS7671:2018, the Big Blue Book, Wiring Regs, or simply the Regs. But regardless of what you call it, one thing is for sure – if you’re involved in the design, installation or maintenance of electric wiring, you’re going to need it. The book is set out in seven parts and certainly isn’t for the faint hearted. It is full of exactly what it says it is, regulations. But fear not, there is a logic that can be followed. Once you are able to navigate the sections of the book, you will be able to easily find your way around it and apply it to the scenario in hand. The seven parts are;

Minor changes have been made to the model forms and guidance for recipients. These include the addition of fields Chapter 64 contains information on ‘Initial Verification’ and Chapter 65 details ‘Periodical Inspection & Testing’ guidance. Although these areas have substantial cross-over, understanding which subject alludes to which chapter is critical in composing a positive answer.Understand the requirements for inspection and testing of electrical installations (4 questions, 7%) The requirements for RCD testing have been changed and Table 3A (Time/current performance criteria for RCDs) in Appendix 3 has been deleted. Regardless of RCD Type, an alternating current test at rated residual operating current (IMn) is used to verify the effectiveness. Section 702 - Swimming pools and other basins Questions often use terminology that alludes specifically to certain parts of the 18th edition book. If the information in these particular sections do not form part of your response, it’s highly likely that you will have set out on the wrong course of direction. However, if you have a solid working knowledge, this element of the exam’s approach will be a help rather than hinderance.

The 18th Edition exam is an assessment of your ability to use the Wiring Regulations BS7671 2018 out there in the big world. As such problems and questions may not always be worded exactly as you come across them in the book.

Appendices

For all other cases, protection against transient overvoltages shall be provided unless the owner of the installation declares it is not required due to any loss or damage being tolerable and they accept the risk of damage to equipment and any consequential loss. Modifications have been made to Regulation Group 543.7 concerning earthing requirements for the installation of equipment having high protective conductor currents.