Classifying defects correctly is one of the most intellectually demanding parts of an EICR. You need to decide whether a condition is C1 (danger present), C2 (potentially dangerous), C3 (improvement recommended), or FI (further investigation required). Then you need to cite the specific BS 7671 regulation that the defect contravenes. Getting either part wrong undermines the credibility of your certificate.
Elec-Mate's Defect Code AI makes this instant and accurate. Describe the defect in plain English:
"No RCD protection on socket circuit in the kitchen"
AI response: C2 — Potentially Dangerous. Regulation 411.3.3 (BS 7671:2018+A4:2026). Additional protection by an RCD with a rated residual operating current not exceeding 30 mA shall be provided for socket-outlets with a rated current not exceeding 32 A.
"Domestic property — lighting circuit has no RCD protection"
AI response: C2 — Potentially Dangerous. Regulation 411.3.4 (BS 7671:2018+A4:2026). Within domestic (household) premises, additional protection by an RCD with a rated residual operating current not exceeding 30 mA shall be provided for AC final circuits supplying luminaires. This requirement was introduced by A4:2026 and applies to all domestic installations regardless of age — an unprotected lighting circuit in a domestic property is a C2 defect under the current edition.
The AI is trained on BS 7671:2018+A4:2026 and thousands of real-world EICR observations. It handles nuanced situations — for example, distinguishing between a C2 (no RCD protection on a kitchen socket circuit in a property wired under the 18th Edition) and a C3 (no RCD protection on a kitchen socket circuit in a property wired under the 16th Edition, where RCD protection was not required at the time of installation).
A4:2026 — Reg 411.3.3 Socket RCD Exception
Under the revised Reg 411.3.3, omission of RCD protection on socket-outlets rated ≤ 32 A is only permitted outside dwellings, and only where a documented risk assessment determines that RCD protection is not necessary. In domestic premises there is no exception — RCD protection on all such socket-outlets is mandatory. The AI applies this distinction automatically so your observation codes reflect the correct edition.
In the app
Never second-guess a defect code again
Describe any defect in plain English. The AI assigns the correct C1, C2, C3, or FI code with the specific BS 7671 regulation reference.