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Minor Electrical Installation Works Certificate

A Minor Electrical Installation Works Certificate covers small additions or alterations to an existing electrical circuit — such as adding a socket, replacing a light fitting, or extending a ring main. It is simpler than a full EIC and is used when no new circuit has been created. The certificate confirms the work complies with BS 7671.

BS 7671 IET Wiring RegulationsValid: Permanent (issued once for the work)

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Sample Minor Works certificate

Sample Minor Electrical Installation Works Certificate certificate created with CertBox, showing the professional PDF layout with description of the minor works carried out, circuit details and protective device, test results (zs, insulation resistance, polarity)

Sample Minor Works with fictional data. All personal details shown are fake.

What it covers

  • Description of the minor works carried out
  • Circuit details and protective device
  • Test results (Zs, insulation resistance, polarity)
  • RCD test results (if applicable)
  • Declaration of compliance with BS 7671

Who needs a Minor Works?

Homeowners
Landlords
Commercial property managers

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Frequently asked questions about Minor Works

When should I use a Minor Works certificate instead of an EIC?
Use a Minor Works certificate when you're making a small change to an existing circuit — adding a socket, replacing a light, moving a switch. If you're creating a new circuit or doing a major alteration, you need a full EIC.
Is a Minor Works certificate notifiable?
Generally no. Minor works on existing circuits are not notifiable under Part P, unless the work is in a bathroom or involves a special location. Check the current Building Regulations for your specific situation.
Do I need to test the whole circuit?
You must test the circuit you've worked on — insulation resistance, earth continuity, Zs, polarity, and RCD operation (if protected by an RCD). You don't need to test the entire installation.

Learn more

Part P compliance guide

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