What Does a C2 Mean on an EICR? Does It Mean the Property Has Failed?

What Does a C2 Mean on an EICR? Does It Mean the Property Has Failed?

If you’ve recently received an Electrical Installation Condition Report (EICR) and it contains a C2 code, you may be wondering how serious it is, whether the property has failed its electrical inspection, and what needs to happen next.

The short answer is:

A C2 means that a potentially dangerous electrical defect has been identified and remedial action is required. An EICR containing one or more C2 observations will normally receive an overall “Unsatisfactory” assessment.

However, a C2 does not necessarily mean that something is immediately dangerous or that the entire electrical installation needs replacing.

In this guide, we’ll explain exactly what a C2 means, how it differs from other EICR classification codes, some common examples, and what property owners and landlords should do next.

What Is an EICR?

An Electrical Installation Condition Report, commonly known as an EICR, is an inspection and test of the fixed electrical installation within a property.

This can include the:

• Consumer unit

• Electrical circuits

• Earthing and bonding arrangements

• Sockets

• Switches

• Lighting circuits

• Fixed electrical equipment

• Protective devices such as RCDs and RCBOs

The purpose of the inspection is to assess the condition of the installation and identify electrical defects, deterioration or safety issues.

During an EICR, the electrician records observations and assigns classification codes according to the level of risk identified.

What Does C2 Mean on an EICR?

A C2 classification means “Potentially Dangerous – Urgent Remedial Action Required.”

This means the electrician has identified a defect that may not be presenting immediate danger at the exact time of inspection but could become dangerous under certain conditions.

Because of the potential safety risk, the issue should be rectified.

A C2 is therefore considerably more significant than an advisory C3 observation.

Does a C2 Mean the EICR Has Failed?

In practical terms, yes.

Although EICRs are formally recorded as either Satisfactory or Unsatisfactory, rather than simply “pass” or “fail”, an EICR containing a C2 classification will result in the overall condition of the electrical installation being assessed as Unsatisfactory.

The same applies if an EICR contains a C1 classification.

The electrical defects responsible for the unsatisfactory assessment will need to be rectified before the installation can be regarded as satisfactory.

What Are Some Common C2 Defects?

There isn’t a universal list of defects that automatically receive a C2 classification.

Electrical inspectors must assess the circumstances of the individual installation and apply engineering judgement in accordance with the current requirements and industry guidance.

However, examples of issues that can potentially result in a C2 classification include:

Broken Ring Final Circuit Conductors

A socket circuit designed as a ring final circuit relies upon continuity of its conductors.

If testing identifies a break within the ring, the circuit may no longer have the current-carrying characteristics expected of the original design.

Further investigation may therefore be required to locate the fault and determine the appropriate repair.

Excessive Earth Fault Loop Impedance

Electrical protective devices must be capable of disconnecting the supply sufficiently quickly when certain electrical faults occur.

If testing identifies an excessive earth fault loop impedance (Zs) value, the protective device may not operate within the required disconnection time.

Depending on the circumstances, this can represent a potentially dangerous condition.

Missing Earthing to Metal Electrical Accessories

Metal switches, light fittings and other exposed conductive parts may require an effective connection to earth.

If adequate earthing is not present, a fault could potentially cause exposed metalwork to become live.

Inadequate RCD Protection

Residual Current Devices (RCDs) provide additional protection against electric shock.

Depending upon the installation, circuit and location, missing or inadequate RCD protection may result in an observation being recorded.

The classification will depend on the individual circumstances rather than simply the age of the installation.

Damaged Electrical Accessories

Sockets, switches, isolators or other electrical accessories that are significantly damaged may expose live parts or compromise the safety of the installation.

Again, the classification depends upon the severity and circumstances of the defect.

What’s the Difference Between C1, C2 and C3?

Understanding the classification codes makes an EICR much easier to interpret.

C1 – Danger Present

A C1 indicates that danger is present and immediate action is required.

The inspector may need to take action during the inspection to remove the immediate danger where possible.

An EICR containing a C1 will be assessed as Unsatisfactory.

C2 – Potentially Dangerous

A C2 indicates a potentially dangerous condition where urgent remedial action is required.

An EICR containing a C2 will also be assessed as Unsatisfactory.

C3 – Improvement Recommended

A C3 means that an improvement is recommended, but the observed issue is not considered sufficiently dangerous to warrant a C1 or C2 classification.

A C3 observation on its own does not make an EICR Unsatisfactory.

This distinction is important, particularly with older electrical installations.

An installation does not automatically require upgrading simply because it does not comply with every aspect of the latest edition of the Wiring Regulations.

The inspector must assess the safety of the existing installation.

What Does FI Mean on an EICR?

You may also see the classification FI, which means Further Investigation Required Without Delay.

This is used when the inspector identifies something that cannot be fully determined during the initial inspection but which could potentially present a safety concern.

Further investigation is therefore required to establish the cause and determine whether remedial work is necessary.

An FI classification also results in an Unsatisfactory EICR.

Does a C2 Need to Be Repaired Immediately?

A C2 is classified as requiring urgent remedial action.

It should therefore not simply be ignored or left until the next periodic inspection.

The appropriate repair will depend upon the defect identified.

Some C2 remedial works can be relatively straightforward, such as replacing a damaged electrical accessory.

Others may require electrical fault finding or further investigation before the exact repair can be established.

For example, a break identified during ring final circuit continuity testing may require sockets and connections to be inspected progressively until the fault is located.

Does a C2 Mean the Property Needs Rewiring?

No.

Receiving a C2 classification does not automatically mean that a property requires a full rewire.

This is an important distinction.

Many electrical defects identified during an EICR can be rectified individually without replacing the entire installation.

A full rewire would generally only be recommended where the overall condition, age, deterioration or design of the electrical installation makes extensive replacement necessary or more practical.

A properly conducted EICR should identify the actual defects rather than automatically recommend replacement simply because an installation is older.

Can an Old Electrical Installation Still Pass an EICR?

Yes.

The age of an electrical installation alone does not determine whether an EICR is satisfactory.

Older installations may contain equipment or wiring methods that would not necessarily be installed in exactly the same way today.

That does not automatically make them unsafe.

The electrician assesses the condition and safety of the existing installation and determines whether defects present a danger or potential danger.

This is also why an older consumer unit does not automatically mean that an EICR should fail.

What Happens After C2 Remedial Work Is Completed?

Once the required remedial works have been completed, the electrician should provide appropriate documentation confirming what work has been carried out.

Depending upon the work involved, this could include electrical certification relating to the remedial work.

The original EICR should not simply be altered to make the C2 disappear.

Instead, the EICR and subsequent certification or written confirmation of the remedial work together provide evidence that the identified defect has been rectified.

Where appropriate, a new or updated assessment may also be produced depending upon the circumstances and the contractor’s certification process.

C2 Codes in Rental Properties

EICRs are particularly important for landlords because electrical safety requirements apply to privately rented properties in England.

Where an electrical safety report identifies remedial or further investigative work, landlords may have statutory responsibilities regarding how quickly the work must be completed.

For this reason, landlords receiving an Unsatisfactory EICR should arrange for the observations to be reviewed and the necessary remedial work completed promptly.

Property managers should also retain copies of the original EICR and the documentation relating to subsequent remedial work.

Can Another Electrician Carry Out the EICR Remedial Work?

Yes.

You are not normally obliged to use the same electrical contractor that carried out the original EICR.

Another suitably competent electrical contractor can review the observations and carry out the necessary remedial work.

However, they should have access to the original report so they can see exactly what was identified, including the relevant circuits, observations and test results.

In some cases, additional testing may be required before the electrician can confirm the appropriate repair.

Should I Get a Second Opinion on a C2?

If you believe an observation has been incorrectly classified, you can seek a second professional opinion.

EICR coding is not simply a matter of whether an installation complies with the newest regulations.

Inspectors must assess the level of electrical safety risk presented by an observed condition.

Consequently, there can occasionally be differences in professional judgement between inspectors.

If you’re questioning a C2, ask the electrician to explain:

• What defect has been identified?

• What electrical risk does it create?

• Why has it been classified as potentially dangerous?

• What remedial work is required?

• Is further investigation necessary before the repair can be confirmed?

A competent inspector should be able to explain the reasoning behind the classification.

Do You Need Help Understanding a Failed EICR?

If you’ve received an Unsatisfactory EICR containing C1, C2 or FI observations, the terminology can sometimes make it difficult to understand what actually needs repairing.

Switch Electrical & Mechanical Services carries out EICR testing, electrical fault finding and EICR remedial works across Newcastle, Gateshead and the surrounding Tyne & Wear area.

We can review existing EICR observations, investigate electrical faults and provide quotations for the remedial work required to bring an installation to a satisfactory standard.

For landlords and property professionals managing multiple properties, we can also assist with ongoing electrical inspection, testing and compliance requirements.

Need an EICR or EICR Remedial Works in Newcastle or Gateshead?

Switch Electrical & Mechanical Services Ltd provides electrical inspection, testing, fault finding and remedial works for homeowners, landlords and property professionals throughout Newcastle, Gateshead and the wider Tyne & Wear area.

If you already have an Unsatisfactory EICR, send us a copy of the report and we can review the observations and advise on the remedial works required.

Related guides from the Switch Electrical Information Portal:

Understanding EICR Classification Codes – C1, C2, C3 and FI

How Often Does a Rental Property Need an EICR?

Consumer Units Explained: When Does an Older Fuse Box Need Upgrading?

Electrical Safety for Landlords: A Practical Guide to EICRs and Remedial Works