Certification 🇬🇧 UK
What do EICR codes C1, C2, C3, FI mean?
C1: danger present – act immediately. C2: potentially dangerous – urgent action. C3: improvement recommended. FI: further investigation needed. Under A4, only C1 and C2 make the report unsatisfactory.
Regulation: BS 7671:2018+A4:2026 (model forms, A4:2026).
Study aid in plain English, not the text of the standard. Always check the current BS 7671 and your local rules. Electrical work must be done by a licensed or registered electrician.
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