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Minor works certificate template and example
A minor electrical installation works certificate (MEIWC) covers work to an existing circuit that does not include a new circuit, such as adding a socket or a light. Here is what the form contains.
It is shorter than an EIC but still a BS 7671 model form: it must be completed and signed by the competent person who did the work.
What a minor works certificate must contain
- Description of the minor works and the address
- Part 1: description of the work, any departures from BS 7671, and comments on the existing installation
- Part 2: installation details, including the system earthing arrangement and the protective measures
- Part 3: essential tests for the circuit worked on: continuity, insulation resistance, polarity, earth fault loop impedance (Zs) and RCD operation
- Declaration with the name, signature and date of the competent person
Copy-and-use template
MINOR ELECTRICAL INSTALLATION WORKS CERTIFICATE (study copy of the layout) Issued by / company: ______________________ Tel: ______________ PART 1 DESCRIPTION OF THE MINOR WORKS Description: ____________________________________________ Location / address: _____________________________________ Date: __________ Departures from BS 7671: _____________ Comments on existing installation: ______________________ PART 2 INSTALLATION DETAILS Earthing / system: [ ] TN-C-S [ ] TN-S [ ] TT Protective measure: [ ] ADS [ ] SELV/PELV [ ] Double insulation PART 3 ESSENTIAL TESTS (circuit worked on) Continuity of protective conductor: ______ ohms Pass/Fail Insulation resistance L-N ______ Mohm, L-E ______ Mohm Pass/Fail Polarity: correct / incorrect Pass/Fail Zs at the point of work: ______ ohms (max ______ ohms) Pass/Fail RCD operating time (if fitted): ______ ms at I delta n Pass/Fail Declaration: the works described above have been designed, constructed, inspected and tested in accordance with BS 7671. Name: ______________ Signature: ______________ Date: __________
Copy this into your own document, or generate it automatically in SparkCerts with your details already on it.
When is a minor works certificate required instead of an EIC?
The line between the two certificates is one word: circuit. A minor works certificate covers additions or alterations to an existing circuit. The moment the work creates a new circuit at the consumer unit, even a single new radial or a two-way garage feed, BS 7671 requires a full electrical installation certificate with both schedules.
| The job | The certificate it needs |
|---|---|
| Adding a socket to an existing ring final | Minor works certificate |
| Replacing a light fitting or adding a spur | Minor works certificate |
| New cooker circuit from the board | Full EIC |
| Garage, shed or EV charge point sub-main | Full EIC |
| Consumer unit replacement | Full EIC |
The question searchers ask most on this topic is exactly that trade-off, and it is worth spelling out on every quote: minor works is quicker because Part 3 only asks for the essential tests on the circuit you touched, while an EIC certifies the design of a whole new circuit.
The line that catches people out: a minor works certificate cannot be used where a new circuit was created. Add a circuit at the board and you need a full EIC. SparkCerts picks the right certificate for the job and checks the essential tests as you enter them.
Common questions
When can I use a minor works certificate?
Use one for additions or alterations to an existing circuit that do not include a new circuit, such as adding a socket, a light or a spur. If you add a new circuit at the consumer unit, you need a full EIC instead.
Does a minor works certificate need test results?
Yes. Part 3 records the essential tests for the circuit worked on: continuity, insulation resistance, polarity, Zs and, where fitted, RCD operating time.
Related: Minor works certificate explained · When you need a full EIC · Certificate software
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