EICR C2 Meaning

What Does an EICR C2 Mean?

EICR C2 Meaning;

An EICR (Electrical Installation Condition Report) is a document issued after an inspection of an electrical installation. It checks the property against national safety standards for electrical installations and flags any potential issues.

An electrician performing an EICR will identify any problems or ‘observations’ and code them according to their risk level using a code system based on red, amber and green traffic lights.

C2 – Potentially Dangerous (EICR C2 Meaning)

Our engineers often identify faults that need to be rectified during an EICR inspection. These are then recorded on your report and graded according to danger levels – C1, C2 or FI.

Common Real-World Examples of EICR C2 Faults

While a C2 fault does not pose an instant shock risk at the exact second of testing, it indicates a critical safeguard is missing. In London rental properties, our electricians most commonly issue C2 codes for the following defects:

• Absence of Main Earthing or Protective Bonding: Metal gas, water, or oil service pipes entering the property without proper bonding conductors, creating severe shock hazards if an electrical fault develops.
• RCD Failing Disconnection Time Tests: A 30mA Residual Current Device (RCD) that freezes or fails to trip within the required milliseconds during testing, leaving socket circuits without life-saving shock protection.
• Cracked Socket Outlets or Light Switches: Physical damage or broken faceplates where internal live conductors are not completely exposed, but could easily be touched if pressed or plugged into.
• Undersized Cabling on High-Load Circuits: Wiring that is too small for modern high-demand appliances (such as electric showers, induction hobs, or EV chargers), causing dangerous overheating behind walls.
• Inadequate IP Rating in Bathrooms: Standard light fittings or switches installed too close to showers or baths lacking the required water-ingress protection (minimum IP44/IP65).
• Loose Connections Inside the Consumer Unit: Poorly torqued screw terminals causing localized thermal damage and scorching behind the fuse board.

Code 1 (C1) alerts are an urgent danger to employees, customers or guests and should be addressed right away. Live conductors or maintenance panels that have been removed with conductive parts exposed pose particular hazards in this regard.

If a C1 is detected, then it’s recommended to turn off or isolate the circuit until repairs can be made. Depending on how serious the issue, you may even be asked to stop using your computer until repairs have been completed.

A C2 code indicates a problem which may not be immediate but could become hazardous in the future. While less serious than a C1, this still needs immediate attention and should be addressed.

C2 issues could include the absence of mains-protected bonding or earthing, or an RCD fault that does not trip when tested. Another example would be an incorrectly sized bond conductor that is too large.

Another issue that could trigger this code is the failure of a mains protection device to safeguard against mains overload. This indicates there is an elevated risk that an electrical hazard could occur should the appliance be put through excessive strain in the future.

A broken socket can be indicated as a C2 fault.

When it comes to EICR Codes, two of the most critical to know are C1 and C2. Both need immediate remediation while a C3 will suggest an improvement.

EICR Classification Codes Compared (C1 vs C2 vs C3 vs FI)

An FI code, however, requires further investigation and is issued when an engineer detects a fault not covered in the main report. This could include something as minor as a malfunctioning warning light or slightly worn but functional casing that wasn’t covered by the main report.

Frequently Asked Questions About EICR C2 Codes

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