EICR Manual: Fixed Wire Testing for Commercial Estates
Understand the requirements, codes, and frequencies of an Electrical Installation Condition Report (EICR) for your commercial property.
An Electrical Installation Condition Report (EICR) is the ultimate test of your building's electrical safety. Regular fixed wire testing verifies that the entire electrical infrastructure—distribution boards, lighting circuits, sockets, and built-in equipment—remains safe for continued use by your staff and visitors.
Statutory Legislation
Electricity at Work Regulations 1989
All electrical systems must be maintained in a condition that prevents danger. For commercial premises, an EICR every 5 years is the accepted standard of demonstrating compliance.
Standard EICR interval — commercial
Recommended interval for industrial/high-risk
Highest severity code — immediate action required
What is Fixed Wire Testing?
Electrical systems degrade over time due to load, age, and environmental factors. Fixed wire testing involves a qualified electrician conducting a visual inspection and detailed diagnostic testing on the permanent wiring of a property. The result is the formal EICR document.
Understanding EICR Observation Codes
During the inspection, the engineer will assign an observation code to any identified faults. Understanding these codes is critical, as they determine whether the installation is deemed "Satisfactory" or "Unsatisfactory".
| Code | Severity | Meaning | EICR Outcome |
|---|---|---|---|
| C1 | DANGER PRESENT | Risk of injury. Immediate action required. Circuit may need isolating on the day. | UNSATISFACTORY |
| C2 | POTENTIALLY DANGEROUS | Urgent remedial action required. Installation will fail until works are completed. | UNSATISFACTORY |
| C3 | IMPROVEMENT RECOMMENDED | Does not comply with current BS 7671 but not deemed unsafe. EICR will still pass. | SATISFACTORY |
| FI | FURTHER INVESTIGATION | Issue identified but could not be fully diagnosed during testing. | UNSATISFACTORY |
Important
If your report contains any C1, C2, or FI codes, the overall assessment will be Unsatisfactory. Your building is not legally compliant until all remedial works are completed and evidenced.
The Reality of EICR Contractors
Selecting a competent contractor for your EICR is essential. The market ranges from established, reliable engineering firms to dubious operators offering "drive-by" reports.
Beware the 'Drive-By EICR'
Budget contractors achieve impossibly low rates per circuit by conducting minimal visual inspections instead of full physical testing — then issuing large volumes of C2 failures to generate lucrative remedial work. Always use a NICEIC-approved contractor and request a sample-testing methodology before committing.
EICR Testing with EntireFM
EntireFM approaches fixed wire testing with absolute precision, providing transparent testing methodologies focused on long-term safety, not generating immediate remedial upsells.
NICEIC-Approved Engineers
All EntireFM electrical engineers are NICEIC-approved — ensuring your EICR is legally defensible and produced to the correct standard.
Rolling 20% Annual Testing
We plan testing schedules that minimise operational downtime — completing 20% of circuits annually across a 5-year rolling programme, not disrupting your entire building at once.
Rapid Remedial Turnaround
If C1 or C2 faults are found, our engineering teams provide same-day transparent quotes and rapid response to restore your compliance.
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Key Statistics
- Standard: BS 7671 / 18th Edition
- Commercial frequency: Every 5 years
- Industrial frequency: Every 3 years
- Approving body: NICEIC / NAPIT
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