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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)

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.

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