Office trunking and twin sockets in a commercial fit-out tested by CJA Electrical

Fixed wire testing for offices, retail units, and small workshops in Higham. Commercial EICRs sit on a longer cycle than domestic — typically five years for low-risk premises, three for industrial, one for higher-risk environments — and are referenced in IET Guidance Note 3 rather than the residential PRS regulations. The certificate is what insurers ask for at policy renewal and what Gravesham Borough Council expects to see if a complaint or incident triggers an inspection.

What Commercial EICR actually is

A commercial EICR is a periodic inspection and test of the fixed wiring in a commercial premises — the distribution board, sub-circuits, sockets, lighting, and fixed equipment connections. It’s the same fundamental process as a domestic EICR, but typically covers larger installations, three-phase supplies, and the kind of building services (emergency lighting interface, fire alarm interface, plant equipment) that don’t appear in residential. The output is a written report against BS 7671 with observation codes (C1, C2, C3, FI) on anything that doesn’t meet the regulations, plus a schedule of test results documenting what was actually measured. The duty-holder uses the report to plan remedial work and demonstrate compliance.

When you need Commercial EICR in Higham

There’s no single statutory cycle for commercial EICRs the way there is for domestic landlord property — the duty-holder works to IET Guidance Note 3 and to whatever the insurer’s policy schedule requires. Most policy schedules across Gravesham reference five-year intervals as standard, with shorter cycles where the building has higher inherent risk. What we see most often in Higham is the renewal trigger — the insurer asks for a current certificate at the policy anniversary, the building’s last EICR is more than five years old, and we get called in to bring it back into date. Other common triggers: a new tenant on the lease, a CDM-flagged fit-out completion, a refurbished consumer unit that needs documenting against the new circuits.

Main service fuse, cutout and smart meter on the incoming supply
Main service fuse, cutout and smart meter on the incoming supply

Standards and what compliance looks like

The two pieces of regulation that sit behind a commercial EICR are BS 7671:2018+A2:2022 (the IET Wiring Regulations — the technical standard the inspection works to) and the Electricity at Work Regulations 1989 (the legal duty on the employer or building owner to keep the installation safe and maintained). The EICR document itself follows the format set out in BS 7671 Appendix 6 — schedule of inspections, schedule of test results, list of observations with codes. Reports formatted to that standard are accepted by every insurer, every Gravesham local authority, and every commercial landlord we’ve worked with.

Testing schedule and remedials

The standard test sequence is documented in BS 7671 Part 6 — inspection first, then dead tests, then live tests. We work circuit-by-circuit, isolating each in turn so the rest of the building stays live, which is what makes phased testing during business hours feasible on most Higham commercial premises. Once testing is done the report is drafted, including the schedule of test results, the schedule of inspections, and the list of observations. The duty-holder typically gets the certificate as a PDF within 48 hours of testing — quicker if there’s a deadline against an insurance renewal or a tenant move-in.

RCD and loop impedance testing in progress on a domestic circuit
RCD and loop impedance testing in progress on a domestic circuit

Why Higham property owners book CJA Electrical

CJA Electrical is based in Rochester and covers commercial work across the whole of Gravesham from there. Higham sits within the 15-minute working radius — close enough that scheduling around your trading hours and getting back for remedial work is a non-issue. The work is done by someone qualified to City & Guilds 2391 (Inspection & Testing) and 2382 (18th Edition Wiring Regulations), using calibrated test equipment, with reports produced in the standard BS 7671 format your insurer and managing agent recognise. No subcontracting — the person on site is the person signing the certificate.

How the work runs

The process from first call to delivered certificate is straightforward. Initial chat (phone or email) to confirm the premises type, circuit count, board count, and access constraints. A quote — fixed price where possible, otherwise capped — covering the testing itself. A scheduled testing visit, typically out-of-hours for retail and during business hours for office. Report supplied as a PDF within 48 hours of testing completing, formatted to BS 7671 with all observations coded. If anything is unsatisfactory, remedial work gets quoted separately so you can decide which observations to clear first. Once the remedials are done, the affected circuits are re-tested and a fresh certificate issued reflecting the post-remedial state of the installation.

What affects the price

Commercial EICR pricing is driven by the size of the installation — number of circuits, number of distribution boards, total accessory count — and the access conditions. Most Higham office EICRs come in as a fixed price after a five-minute scoping call. Industrial premises and multi-board commercial often need a brief site visit before the quote firms up. What’s included in the quote: the inspection, the testing, the written report formatted to BS 7671. What’s quoted separately: any remedial work needed to clear C1 or C2 observations after the report. We don’t bundle remedials into the inspection price — keeping them separate means the duty-holder can shop the remedial quote against other contractors if they want to.

FAQs

Will the testing damage anything?

No. The tests are non-destructive — insulation resistance and earth fault loop are low-current measurements that don’t stress the installation. The most disruptive part is the brief power cuts during dead testing, which is why we schedule around operations. We do power-down sensitive equipment (servers, control systems) properly before testing the circuits that feed them, and we coordinate with you on anything that can’t be cleanly isolated.

Do you handle three-phase installations?

Yes. Three-phase is normal on commercial Higham premises with higher load — workshops, larger offices with mechanical plant, industrial units. Test equipment, methodology, and reporting formats are the same as single-phase but with phase-specific readings recorded on the schedule.

What documentation do I get at the end?

The Electrical Installation Condition Report itself (front page with verdict, schedule of inspections, schedule of test results, list of observations) as a single PDF. We can split it into board-specific certificates if you need separate documents for individual tenants in a multi-tenanted building. The PDF is what your insurer, Gravesham Borough Council, and any future buyer’s surveyor will expect to see.

How often does a commercial EICR need doing?

IET Guidance Note 3 is the reference. Five years is standard for offices, retail, and most small commercial in Higham. Three years for industrial, educational, and most workshop premises. One year for higher-risk environments — cinemas, swimming pools, places of public assembly. The duty-holder can shorten these intervals based on risk assessment, and most insurers require evidence the building is on cycle.

What law requires a commercial EICR?

The Electricity at Work Regulations 1989. Regulation 4(2) makes the duty-holder responsible for keeping the installation safe and maintained, and Regulation 16 makes the employer responsible for ensuring competent persons do the testing. The EICR is the standard documentary evidence of compliance with both. Insurers commonly require it as a condition of policy.

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Frequently asked questions

Will the testing damage anything?

No. The tests are non-destructive — insulation resistance and earth fault loop are low-current measurements that don't stress the installation. The most disruptive part is the brief power cuts during dead testing, which is why we schedule around operations. We do power-down sensitive equipment (servers, control systems) properly before testing the circuits that feed them, and we coordinate with you on anything that can't be cleanly isolated.

Do you handle three-phase installations?

Yes. Three-phase is normal on commercial Higham premises with higher load — workshops, larger offices with mechanical plant, industrial units. Test equipment, methodology, and reporting formats are the same as single-phase but with phase-specific readings recorded on the schedule.

What documentation do I get at the end?

The Electrical Installation Condition Report itself (front page with verdict, schedule of inspections, schedule of test results, list of observations) as a single PDF. We can split it into board-specific certificates if you need separate documents for individual tenants in a multi-tenanted building. The PDF is what your insurer, Gravesham Borough Council, and any future buyer's surveyor will expect to see.

How often does a commercial EICR need doing?

IET Guidance Note 3 is the reference. Five years is standard for offices, retail, and most small commercial in Higham. Three years for industrial, educational, and most workshop premises. One year for higher-risk environments — cinemas, swimming pools, places of public assembly. The duty-holder can shorten these intervals based on risk assessment, and most insurers require evidence the building is on cycle.

What law requires a commercial EICR?

The Electricity at Work Regulations 1989. Regulation 4(2) makes the duty-holder responsible for keeping the installation safe and maintained, and Regulation 16 makes the employer responsible for ensuring competent persons do the testing. The EICR is the standard documentary evidence of compliance with both. Insurers commonly require it as a condition of policy.

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