When you receive an Electrical Installation Condition Report (EICR), the technical language can feel overwhelming—especially the classification codes. These short labels—C1, C2, C3, and FI—carry significant meaning, and understanding them is essential for making informed decisions about your property’s safety and compliance.
This guide breaks down each code in a clear, straightforward way so you know exactly what they mean and what actions to take.
Why EICR Codes Matter?
EICR codes are used by electricians to classify the severity of issues found during an inspection. They determine whether your installation is safe—and whether your report will be marked as “Satisfactory” or “Unsatisfactory.”
In simple terms:
- Some issues require urgent action
- Others are advisory improvements
- A few require further investigation
C1 – Immediate Danger (Act Now)
What it means:
There is a serious and immediate risk of injury. This could include exposed live wires, overheating components, or faulty connections.
What happens next:
- The electrician may make the issue safe on the spot (if possible)
- Immediate repair is required
- The report will be marked Unsatisfactory
Example issues:
- Exposed live conductors
- Severely damaged sockets or switches
- Burning or overheating wiring
Bottom line: This is the most serious classification. Action cannot be delayed.
C2 – Potentially Dangerous (Urgent Attention Needed)
What it means:
There is no immediate danger, but the issue could become dangerous if left unresolved.
What happens next:
- Repairs should be carried out as soon as possible
- The report will still be marked Unsatisfactory
Example issues:
- Lack of proper earthing or bonding
- Absence of RCD protection where required
- Faulty wiring that could deteriorate
Bottom line: Not an emergency like C1, but still a priority.
C3 – Improvement Recommended (Not a Failure)
What it means:
The installation is safe, but improvements could be made to meet current standards.
What happens next:
- No immediate action required
- The report can still be marked Satisfactory
Example issues:
- Older fuse board that doesn’t meet modern standards
- Minor upgrades to improve safety or efficiency
Bottom line: Good to fix, but not essential for compliance.
FI – Further Investigation Required
What it means:
The electrician has identified something that needs closer examination before a proper assessment can be made.
What happens next:
- Additional testing or inspection is required
- The report will usually be marked Unsatisfactory until resolved
Example issues:
- Unidentified faults in circuits
- Suspicious readings during testing
- Hidden wiring concerns
Bottom line: This is a “we need more information” category—don’t ignore it.
What Makes an EICR “Satisfactory”?
Your report will only be marked Satisfactory if:
- There are no C1 or C2 issues
- There are no FI observations requiring further investigation
C3 observations are acceptable and won’t cause a failure.
Common Misunderstandings
- “C3 means I failed” → Not true. C3 is advisory only
- “I can ignore FI” → Risky. It could hide a serious issue
- “C2 isn’t urgent” → It is. It just isn’t immediately dangerous yet
Understanding these distinctions helps you avoid unnecessary costs—or worse, unsafe conditions.
Final Thoughts
EICR codes aren’t just technical jargon—they’re a clear roadmap of your property’s electrical safety. Knowing what each classification means allows you to:
- Prioritise repairs effectively
- Stay compliant with regulations
- Protect occupants and property
Need Help with Your EICR?
If you’ve received an EICR and aren’t sure what to do next, or even need an EICR in London, Route Electrical Ltd is here to help. We provide clear, honest assessments and carry out all necessary remedial work to bring your property up to standard—without confusion or unnecessary upselling.
Get in touch today to book an inspection or discuss your report with a qualified professional.
