TradedocMinor Works certificate
A blank Minor Electrical Installation Works Certificate you can print and fill in by hand. Or the faster option: build it on your phone straight after test, signed and emailed before you're back in the van. Tracks BS 7671 Amendment 4:2026 (the Orange Book).
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What it is
A Minor Electrical Installation Works Certificate (MEIWC, or just 'Minor Works') is issued for additions or alterations to an existing circuit that do not involve a new circuit. New socket, fused spur, light fitting, replacement consumer unit switch — all live on a Minor Works. Entirely new circuits need an Electrical Installation Certificate (EIC) instead.
UK legal requirement
Issued under BS 7671:2018 Amendment 4:2026 — the 'Orange Book' (Wiring Regulations, 18th Edition). Published 15 April 2026 with a six-month transition: the previous edition (A2:2022 + A3:2024) remains valid alongside A4 until 15 October 2026, after which only A4 is in force. Notifiable work under Part P of the Building Regulations 2010 in England and Wales still requires Building Control sign-off or a competent-person scheme notification separately — the Minor Works on its own does not cover Part P notification.
Compliance status
This template tracks BS 7671 Amendment 4:2026 (the 'Orange Book'). Our compliance radar crawls the publishing bodies every six hours — see the standards we build to today or the radar of what's coming next.
Engineer remains responsible for verifying compliance with the version applicable to their work. TradeDoc is a tool, not a regulator.
Who needs it
- ·Electricians adding sockets, spurs, or lights to existing circuits
- ·Contractors replacing consumer unit switches or single RCDs
- ·Anyone testing and certifying additions after first-fix work
- ·Landlords adding outdoor sockets or garden lighting before a re-let
What goes on it
Every mandatory field, in the order the inspector or auditor will check them.
Details of the contractor + client
Contractor name and address, client name and address of installation, description of the work carried out, date completed.
Installation description
Clear one-line description of what was done (for example, 'Added one double socket on existing ring circuit in utility room'). Circuit identifier, location, new equipment added.
Comments on existing installation
Condition of the existing circuit the minor works was added to. Any observations that affect the safety of the alteration. This is the section most often skipped and the one most often flagged in audit.
Test results
Protective conductor continuity (R1+R2), insulation resistance (at 500V DC), earth fault loop impedance (Zs) at the new point, polarity at the new point, RCD operation (IΔn trip time and trip current at IΔn and 5xIΔn).
Declaration
Signed declaration by the competent person that the minor works is in accordance with BS 7671, the date of the test, the qualification of the signatory.
Common mistakes on a hand-filled one
The small things that get picked up on audit, insurance review, or when the next engineer reads it.
- ✗No R1+R2 reading — polarity-only testing is not enough, the continuity of the protective conductor must be measured
- ✗Recording Zs at the origin instead of at the new point — the test must be carried out at the furthest point of the new addition
- ✗Forgetting RCD trip times — both at IΔn and 5xIΔn are required, not just one
- ✗Using a Minor Works for a brand-new circuit — a new circuit needs an EIC, not a MEIWC
- ✗No Part P notification when the work was in a kitchen or bathroom or outdoors (England/Wales) — the certificate doesn't remove the Building Regs duty
- ✗Leaving 'comments on existing installation' blank — even 'satisfactory' is better than empty
The faster option
Fill one on your phone in 2 minutes
Pick the template. Answer the fields. Customer signs from their inbox. PDF saved in the vault with a unique number. Free forever on your first 100 docs a month. Pro £15/month adds custom branding and one-tap customer email. No card at sign-up.
Frequently asked questions
What counts as minor electrical works?+
Additions or alterations to an existing circuit that do not extend the circuit to become a new one. Typical examples: adding a socket, fused spur, or light fitting; replacing a damaged switch or socket faceplate; adding an outdoor socket on an existing ring. Brand-new circuits, new consumer units, and fuse changes beyond like-for-like need an EIC instead.
Is minor works certifiable work under Part P?+
It depends on location and nature of work in England and Wales. Additions to circuits in kitchens, bathrooms or outdoors are notifiable under Part P, regardless of whether they are a 'minor works' on the BS 7671 certificate. The Minor Works certificate does not on its own satisfy Part P — notification to Building Control or via a competent-person scheme is a separate step.
How long is a Minor Works certificate valid?+
It is not a time-limited certificate. It records the work was done safely and tested to BS 7671 at the time of issue. It does not replace periodic inspection — the installation it became part of will still need an EICR on its regular cycle (5 years for rented, typically 10 for owner-occupied).
Who can sign a Minor Works certificate?+
A 'skilled person (electrically)' competent in the design, construction, inspection and testing of the addition made. In practice, that is a qualified electrician with BS 7671 knowledge and calibrated test equipment. NICEIC, NAPIT, Elecsa and Stroma-registered contractors are the usual signatories.
What's the difference between a Minor Works and a full EIC?+
A Minor Works (MEIWC) is for an addition or alteration that does not include a new circuit. A full Electrical Installation Certificate (EIC) is for any installation of a new circuit — new ring, new lighting circuit, new shower circuit, or a new consumer unit. If the work includes even one new circuit, it's an EIC job, not a Minor Works.
Can I handwrite a Minor Works certificate?+
Yes. As long as every mandatory field is filled, the readings are the actual measured values, and it is signed and dated by the competent person who did the work. Most electricians now use digital versions because the test values are easier to capture alongside MFT output, but the paper form remains equally valid.