IET Wiring Regulations, 18th Edition Amendment 4 (BS 7671:2018+A4:2026)

The IET Wiring Regulations set the national standard for the design, installation and maintenance of electrical wiring in domestic, commercial and industrial environments. This latest edition reflects the full set of requirements up to Amendment 4, providing the definitive reference for anyone working with BS 7671.

Essential for designers, installers and maintenance professionals, this publication brings together all current regulatory requirements in a single, authoritative source. Amendment 4 includes significant updates across multiple areas of BS 7671, ensuring the standard reflects modern practice and emerging technologies.