EICR Coding Guide – 80 Real Defects Coded and Explained

A visual guide to coding EICR observations correctly for UK electricians. Each page shows one real defect found on site, with the suggested code (C1, C2, C3 or FI), the reason behind it, what to test, how to put it right and the most common mistake. Organised by area: consumer units, earthing and bonding, cables, sockets and accessories, bathrooms, outdoor and EV, and testing. Based on BS 7671 (18th Edition). Instant access in the members area (PDF).