BS 7671 Requirements for Electrical Installations 18th Edition

The definitive reference for electrical safety and compliance across all UK installations

BS 7671 is the UK national standard that sets out requirements for electrical installations. Whether you're designing, installing, or maintaining electrical systems in domestic, commercial, or industrial settings, this 18th Edition book provides the mandatory framework you need to ensure your work meets legal and safety standards.

Why electricians, engineers, and contractors rely on this standard:

Every electrician working on fixed installations in the UK is expected to design and install in accordance with BS 7671. Departure from the standard can result in work being rejected by building control, competent person scheme inspectors, or local authorities. More than compliance—it protects your professional liability and insurance coverage.

Current edition with the latest amendments built in

This is the 18th Edition (BS 7671:2018+A4:2026) with all current amendments incorporated. This consolidated publication incorporates all previous amendments, featuring significant updates with sections on Power over Ethernet (PoE) and revised medical locations. New inclusions within BS 7671:2018+A4:2026 are: Stationary Secondary Batteries where the purpose is for electrical storage and supply of electrical installations; Functional earthing and functional equipotential bonding for information and communication technology (ICT) equipment and systems; a new section on Power over Ethernet (PoE) and a major revision of Section 710 Medical Locations and the inclusion of a schedule of test results for recording the resistance of supplementary protective equipotential bonding conductors.

Covers the full scope of modern electrical work

This A4 640-page guide provides crucial information for the design, installation, and maintenance of electrical systems. From basic safety principles to advanced technical guidance on emerging technologies like battery storage, EV charging, and smart systems—this single reference eliminates the need to cross-reference multiple documents.

Essential for anyone working with electrical systems

Anyone whose work involves the design, installation, inspection, testing, or management of electrical installations should hold a current certificate. That includes apprentices developing foundational knowledge, qualified electricians needing the current standard, and electrical engineers specifying systems for larger projects.

The IET Wiring Regulations, 18th Edition BS 7671:2018+A4:2026 is the definitive national standard for electrical installations across domestic, commercial, and industrial settings. Having the physical reference book means immediate access to the regulations without relying on digital connectivity—invaluable on-site when you need clarity on compliance requirements, circuit design, protection methods, or testing procedures.