EICR - what is the meaning of the classification codes used?


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When an Electrical Installation Condition Report (EICR) is carried out at your place of work or rental property, you will receive a report.

This report lists all the checks that were made on your electrical installation. It details whether your test was ‘satisfactory’ (a pass) or ‘unsatisfactory’ (a fail), in line with the 18th edition wiring regulations (BS 7671).

Four different codes are used in an EICR inspection, which identify faulty parts of your installation.

  • Code 1 (C1)
  • Code 2 (C2)
  • Further Investigation (FI)
  • Code 3 (C3)

What do the different codes mean?

Codes on an EICR inspection report

C1 – Danger Present. Risk of Injury. Immediate remedial action required

This is the most high-priority code used in an EICR inspection. This means there is a risk of electric shock or fire if the issue is not made safe as soon as possible.

An example of a C1 code could be the exposure of live electrical parts, deteriorated insulation or broken light switches/plug sockets.

To resolve a C1 code, the issue will either need to be repaired, or the relevant part/circuit isolated and taken out of use.

C2 – Potentially dangerous – urgent remedial action required

This means that this fault is not immediately dangerous in the same way as a C1 code is, but it could quickly become a hazard in the future.

An example of a C2 code could be the absence of mains protected bonding or earthing, or an RCD that does not trip when tested.

C3 – Improvement recommended

This means that this part of the installation is not in line with the wiring regulations, but it does not present any immediate danger. Alternatively, improving it would enhance the safety of the electrical installation.

An example of a C3 code could be the location of a plug socket which could potentially cause damage to a plug or flex.

Think of this code like an ‘advisory note’ on an MOT. You don’t have to get it fixed, but it is recommended you do.

FI – Further investigation required without delay

This code means that the engineer has identified an issue, but they need more time to investigate it. When they do this they will be able to determine the severity of the issue.

Which codes will lead to an unsatisfactory inspection result?

An EICR inspection will be marked as ‘unsatisfactory’ if you get any C1, C2 or F1 codes.

You will have to get remedial work carried out to fix these issues.

What happens after the inspection?

If your report comes back as satisfactory, then there is no further work that needs to be done (unless you want to resolve any C3 issues).

If your report comes back as unsatisfactory, you will need to organise remedial work to get any issues investigated and repaired.

EICR for rental properties

If you are getting an EICR done for a rental property, you must carry out repairs within 28 days of the initial inspection (or sooner if the report specifies it). 

The engineer or electrician will provide written confirmation that they have completed the work. You must then supply this to your tenants and local council within 28 days of the repairs being carried out.

What happens if my EICR inspection comes back as unsatisfactory?

EICR for commercial properties

If you are getting an EICR inspection carried out for a commercial property (for example an office, factory or school), you must carry out any repairs promptly. You aren’t bound by the 28-day deadline that rental properties are, but you do have a duty of care to get repairs carried out as soon as possible.

Your insurance company may request to see the EICR report and any written confirmation of work in the event of a claim.

In both circumstances, you don’t need to have another EICR inspection carried out.