The Boundary Between Restricted and Controlled Work
A registered contractor is asked to replace a bathroom extract fan and add a shaver socket in a hotel refurbishment. The hotel's maintenance technician, who is not a registered electrician, has already run a new 1.5 mm² feed from a spare way in a distribution board to the bathroom and connected it. He tells the contractor the feed is 'done and tested - just connect the accessories'. The contractor's electrician notices the feed has no RCD protection, is run in the ceiling void without mechanical protection across a joist line, and the technician cannot produce any test results. The hotel manager wants the contractor to 'just finish it and sign the lot off' to hit an opening date.
1. Classify the works and explain what the contractor may and may not certify.
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The work splits into two parts:
- Restricted work - the new final circuit from the distribution board, its protection and the connection of the bathroom equipment - is work that only a registered contractor (or appropriately qualified person under the registration regime) may carry out and certify.
- Controlled work - the accessory replacement - may be done by others but still must comply with the wiring rules.
The maintenance technician's feed is not something the contractor can adopt. The contractor did not design, install or supervise it, has no test results, and cannot verify concealed routing. 'Signing the lot off' would be certifying another party's unverified work - a false declaration.
The contractor may:
- Inspect and test the existing feed as an existing installation and record findings.
- Refuse to certify it as its own work.
- Offer to bring the feed up to standard (RCD protection, mechanical protection at the joist line, proper test results) as a variation, then certify only that remediated work.
2. The manager insists on a single certificate covering everything. How should the contractor respond, and what are the safety consequences of the defects found?
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Response: decline to issue a certificate covering work it did not carry out. Offer instead:
- a completion certificate for the remediated feed and the accessories it installs;
- a separate inspection report on the pre-existing arrangement, with the defects recorded.
Put the refusal in writing, with reasons, so the record shows the contractor acted properly under pressure.
Safety consequences of the defects:
- No RCD protection in a bathroom - a location of increased shock risk. Socket outlets and equipment in a bathroom require 30 mA RCD protection under IS 10101. This is a potentially dangerous condition.
- Cable across a joist line without mechanical protection - risk of damage from fixings and abrasion; a nail through the cable could energise the ceiling structure or start a fire. Non-compliant routing.
- No test results - insulation resistance, polarity and loop impedance are unverified; the circuit could be mis-connected or have a neutral/earth fault that only shows under load.
The contractor should not energise the circuit until the RCD and routing issues are corrected.