Commercial Fixed Wire Testing (EICR)

Fixed wire testing involves a detailed inspection and series of electrical tests on the permanent electrical wiring installation within a commercial property – including circuits, distribution boards, sockets, switches, and fixed equipment. The findings are documented in an Electrical Installation Condition Report (EICR).

While no single law mandates testing frequency for all commercial sites, the Electricity at Work Regulations 1989 legally require businesses to maintain electrical systems in a safe condition. Regular EICRs are the industry-standard method to prove compliance, identify risks, and ensure ongoing safety.

Best practice guidance (e.g., from the IET) typically recommends testing every 5 years for most commercial properties like offices and shops, and every 3 years for industrial premises. However, the appropriate interval can depend on the type of business, usage, environmental conditions, and specific requirements from insurers or licensing bodies.

This testing must be conducted by a qualified and competent person, typically an experienced electrician or electrical engineer with specific expertise in inspection and testing procedures according to the current BS 7671 Wiring Regulations. Using a registered competent person, such as an NICEIC Approved Contractor, is highly advisable.

An 'Unsatisfactory' EICR indicates that dangerous (Code C1) or potentially dangerous (Code C2) conditions were identified. Remedial electrical work to rectify these specific issues is required urgently to ensure the safety of the installation and achieve compliance. Code C3 observations are recommendations for improvement but don't automatically make the report unsatisfactory.

A TM44 inspection report and the associated certificate lodged on the national register are valid for five years from the date the inspection was completed. To remain compliant, a new inspection must be undertaken before this five-year period expires.