The NICEIC Site Guide Amendment 4 is the essential on-site reference for contractors and electricians working on domestic electrical installations up to 100 A.
 
Updated for BS 7671:2018 +A4:2026, this guide delivers clear, practical guidance on design, construction, inspection, testing and certification, helping you meet current wiring regulations with confidence.
 
Designed for day-to-day use on site, it explains key safety principles, fundamental protective measures and includes regulation references throughout to support accurate interpretation of the Standard. Quick-reference format ensures you can find compliant solutions fast.