EICR Failures Explained: C1, C2, and FI Codes

Receiving an EICR can be confusing, especially when it includes unfamiliar codes that trigger remedial works.

Understanding what C1, C2, and FI codes mean is essential for managing risk, compliance, and next steps correctly.

This guide breaks each code down in clear, practical terms.

What Do EICR Codes Mean?

EICR codes classify the severity of observed electrical defects.

They help duty holders understand:

• The level of risk

• Whether remedial works are required

• How urgently action is needed

Not all observations are equal.

C1: Danger Present

A C1 code means there is an immediate danger to life.

Examples include:

• Exposed live conductors

• Incorrect polarity

• Missing covers exposing live parts

C1 issues require immediate action. Systems may need to be isolated until repairs are completed.

C1 observations always require EICR remedial works.

C2: Potentially Dangerous

C2 codes indicate conditions that could become dangerous if left unaddressed.

Examples include:

• Inadequate bonding

• Signs of overheating

• Deteriorated insulation

C2 observations still result in an unsatisfactory EICR and require remedial works, but may allow short-term continued use under controlled conditions.

FI: Further Investigation Required

FI codes are often misunderstood.

They indicate that:

• The inspector could not confirm safety

• Additional investigation is needed before compliance can be confirmed

FI codes are not optional. They must be resolved before the installation can be deemed satisfactory.

Which Codes Trigger Remedial Works?

• C1: Immediate remedial works required

• C2: Remedial works required

• FI: Investigation and likely remedial works

Any EICR containing C1, C2, or FI observations is unsatisfactory.

Why Misunderstanding Codes Creates Risk

Delaying action because codes are misunderstood increases:

• Legal exposure

• Fire risk

• Insurance issues

• Liability following incidents

Clear interpretation and prompt planning are essential.

Managing Remedial Works After Code Identification

Once codes are confirmed:

1. Prioritise based on risk

2. Plan remedial works

3. Verify and certify repairs

4. Update compliance records

This process should be supported by a competent contractor.

How Protest ES Ltd Helps After Failed EICRs

Protest ES Ltd supports clients from inspection through to compliance via:

• Fixed wire testing (EICR)

• Electrical remedial repairs

• Thermal imaging surveys

This joined-up approach reduces delay and confusion.

Key Takeaways

• C1 means immediate danger

• C2 means urgent risk

• FI means uncertainty that must be resolved

• All three require action

• Remedial works protect people and organisations