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 Kings Hill. 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 Tonbridge and Malling Borough Council expects to see if a complaint or incident triggers an inspection.

What Commercial EICR actually is

The technical name for what most Kings Hill commercial clients call “fixed wire testing” is a periodic EICR — Electrical Installation Condition Report — to BS 7671. It documents the condition of the building’s permanent electrical installation at a specific point in time and identifies any departures from the current wiring regulations. The point of the document is twofold. First, it’s the duty-holder’s primary evidence of compliance with the Electricity at Work Regulations 1989. Second, it’s a maintenance planning tool — the C2 and C3 observations form the punchlist of work the building needs over the next inspection cycle to stay compliant.

When you need Commercial EICR in Kings Hill

The standard inspection cycle for commercial premises follows IET Guidance Note 3. For most Kings Hill offices, retail units, and small workshops that’s five years. Industrial premises, educational buildings, and laboratories typically run on a three-year cycle. Higher-risk environments — cinemas, theatres, swimming pools, petrol stations, places of public assembly — sit on annual inspection. Beyond the periodic cycle, an EICR is commissioned at change of occupancy (new tenant taking over a unit), after major refurbishment, after a known fault or insurance claim, and on insurance request at policy renewal. We’ve also done a few in Kings Hill where a sale is in progress and the buyer’s surveyor has flagged the electrics for further investigation.

Modern RCBO consumer unit after a satisfactory EICR
Modern RCBO consumer unit after a satisfactory EICR

Standards and what compliance looks like

BS 7671 is the technical standard for the work itself — what “satisfactory” looks like, what gets tested, the tolerances on each test, the format of the report. The Electricity at Work Regulations 1989 is the law that says the duty-holder must keep the installation safe and provides the framework for prosecution if they don’t. Together they’re the framework Kings Hill duty-holders work within. The current edition of BS 7671 is the 18th Edition with Amendment 2 (2022); any EICR signed off after January 2023 should reference that. Reports referring to older editions of BS 7671 are still technically valid for the cycle they were issued in but should be re-tested to current standards on the next inspection.

Testing schedule and remedials

Each circuit is tested in turn. Dead testing — with the circuit isolated — covers continuity of protective and bonding conductors, insulation resistance, polarity, and (for ring finals) ring continuity. Live testing — with the supply restored — covers earth fault loop impedance, prospective fault current, and RCD operating times. Every measurement is recorded on a schedule of test results and lodged with the certificate. Findings are recorded against observation codes (C1, C2, C3, FI) with a note against each. The summary on the front of the certificate gives an overall verdict — satisfactory or unsatisfactory — based on whether any C1 or C2 observations are present. C3 observations alone don’t make a report unsatisfactory; they’re recommendations rather than failures.

Fully labelled domestic consumer unit after EICR testing
Fully labelled domestic consumer unit after EICR testing

Why Kings Hill property owners book CJA Electrical

We work with commercial clients across Kings Hill the same way we work with domestic clients: same-day quotes, clear communication on what the inspection involves, transparent pricing, and a written report inside 48 hours. The difference on commercial is just the scheduling — most jobs run outside trading hours or in phased blocks during quieter periods. Reports are formatted to the standard BS 7671 template that insurers, managing agents, and HSE inspectors expect. Remedial work — if the report is unsatisfactory — is quoted separately so the duty-holder can plan the budget and prioritise C1 and C2 observations first.

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 Kings Hill 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

What happens if the report comes back unsatisfactory?

Unsatisfactory just means the inspection has flagged C1 or C2 observations — items that need putting right to bring the installation back to compliance. The report lists each item, and CJA Electrical can quote separately for the remedial work. Once the remedials are done, the affected circuits are re-tested and a fresh, satisfactory certificate is issued.

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 Kings Hill 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, Tonbridge and Malling 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 Kings Hill. 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

What happens if the report comes back unsatisfactory?

Unsatisfactory just means the inspection has flagged C1 or C2 observations — items that need putting right to bring the installation back to compliance. The report lists each item, and CJA Electrical can quote separately for the remedial work. Once the remedials are done, the affected circuits are re-tested and a fresh, satisfactory certificate is issued.

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 Kings Hill 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, Tonbridge and Malling 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 Kings Hill. 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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