The IET Wiring Regulations is the national standard to which all domestic and industrial wiring must conform. It is essential to all those concerned with the design, installation and maintenance of electric wiring in buildings. The 18th Edition is a major update to this title and contains extensive changes to many areas of BS 7671. The 18th Edition has been further updated to include two subsequent amendments as BS 7671:2018+A2:2022.

BS 7671:2018+A2:2022 incorporates changes from the first amendment, published in 2020, regarding Electric Vehicle Charging Installations to provide greater guidance on embracing changing technology within this sector. Additional changes within the second amendment include protection against thermal effects and fire caused by electrical equipment, protection against voltage disturbances and electromagnetic disturbances, and a new chapter on prosumer's low-voltage electrical installations covering energy efficiency measures, the interface with the smart grid, the management of electricity consumption, the management of renewable sources of electricity, and energy storage.