Code explanation
EICR C1 Code: Danger Present
A C1 on an EICR means danger is present and a risk of injury exists. It requires immediate action and always makes a report Unsatisfactory.
A C1 classification on an EICR means "Danger present — risk of injury". It is the most serious code and indicates that someone could be hurt by the installation in its current state.
What a C1 means in practice
C1 items involve immediate risk, such as:
- exposed live parts that can be touched;
- accessible conductors that are not properly insulated or enclosed; or
- incorrect polarity leaving equipment live when it appears off.
What must happen
- The inspector should make the situation safe on the spot where it is possible to do so (for example by isolating the affected circuit).
- The duty holder must arrange immediate remedial action by a competent person.
- A C1 always results in an Unsatisfactory report.
After a C1
Once the danger has been removed and the remedial work certified, the affected part can be re-assessed. Keep the remedial certificate with the EICR so the record shows the danger was resolved. For how C1 differs from a C2, see C1 vs C2.
Frequently asked questions
What should happen if a C1 is found during the inspection?
A competent inspector will make the situation safe immediately where possible — for example by isolating the affected part — and advise the duty holder that urgent remedial action is required. A C1 always makes the report Unsatisfactory.
Related service
C1, C2 & FI Remedials
Targeted rectification of dangerous and potentially dangerous observations, prioritised by risk.
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Comparison
Difference Between C1 and C2 on an EICR
C1 means danger is present now and requires immediate action; C2 means potentially dangerous — safe now but a fault could make it dangerous. Both fail an EICR.
Learn moreCode explanation
EICR C2 Code: Potentially Dangerous
A C2 on an EICR means potentially dangerous — no immediate danger, but a fault could make it dangerous. It requires urgent remedial action and fails the report.
Learn moreComparison
Difference Between C2 and C3 on an EICR
C2 is potentially dangerous and fails an EICR, requiring urgent remedial work; C3 is a non-urgent improvement recommendation that keeps the report Satisfactory.
Learn moreCode explanation
EICR C3 Code: Improvement Recommended
A C3 on an EICR means improvement recommended — not dangerous and not a fail. Addressing C3 items is good practice but not legally required.
Learn moreThis article provides general guidance and distinguishes legislation, British Standards and good practice. It is not legal advice. Always confirm the specific duties applying to your property and tenure.