How to Fill In a Minor Works Certificate
Use a Minor Works Certificate for eligible additions and alterations, and make the scope clear enough that it cannot be mistaken for a full-installation certificate.
The certificate records minor work on an existing installation, not a broad statement that every part of that installation is satisfactory. Its value depends on accurately describing what was altered and what was actually verified.
This is practical guidance for competent electricians. Assess the actual installation, follow the current edition of BS 7671 and manufacturer instructions, and stop where the work cannot be completed safely.
Key takeaways
- Agree the scope and make the installation safe before starting work.
- Use a controlled sequence rather than relying on a single reading or visual assumption.
- Record the actual result, limitation or action taken while it is still traceable.
- Check the result against the design, protective measures and equipment instructions.
- Issue the appropriate certificate or report when the work is complete.
Scope the work first
The certificate records minor work on an existing installation, not a broad statement that every part of that installation is satisfactory. Its value depends on accurately describing what was altered and what was actually verified.
Method
Describe the existing circuit and the work added or altered, record supply and protective-device details, then enter the applicable inspection and test results. Sign only for the work and verification within your responsibility.
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Checks and common pitfalls
A new circuit, consumer-unit replacement or work outside the certificate's intended scope should not be forced into a Minor Works form. Check that the circuit identification, protective device, results and description all refer to the same work.
Record and hand over
Issue the certificate promptly and retain a copy with photographs, readings and job notes. Tell the client what the certificate covers and any further work or notification that is needed.
Keep the evidence with the job
Record readings, limitations and remedial actions as you work. A clear certificate or report protects the client and makes the next visit easier to manage.
From guidance to action
Frequently asked questions
Can a Minor Works Certificate be used for a new circuit?
No. A new circuit requires the appropriate installation certification and any applicable notification process; do not use Minor Works to shortcut that scope.
Can I rely on a standard rule of thumb?
No. The installation method, supply characteristics, equipment instructions and the current requirements all affect the correct decision. Use the guide as a workflow, then assess the actual job.
What should be recorded?
Record the scope, results, limitations, observations, remedial work and the certificate or report appropriate to the work carried out.
Related guides
Minor Works Certificate: When and How
What counts as minor works, when an MEIWC is enough, and how to fill one in correctly.
Notifiable vs Non-Notifiable Electrical Work
Which domestic jobs must be notified, which are exempt, and how to route each one correctly.
Schedule of Test Results Explained
Every column on the schedule of test results, what each reading means, and how to fill it in without gaps.
