Part of the guide: The Construction Defect Field Guide: 40 Defects by Trade, With Photos
Most defects can be photographed close up, measured with a tape and handled. This one is the exception, and it is the item on which an inspector's judgement is most visible. Exposed wiring: bare conductors, open boxes, missing covers: is either dead and untidy or live and lethal, and from the outside the two look the same. The write-up has to work for both, which means it has to work for the second.
What counts as exposed wiring?
- Bare or damaged conductors: copper visible where insulation has been stripped, cut or crushed; sheath damaged so the cores show.
- Open accessories: a back box with cables in it and no socket, switch or blanking plate; a faceplate hanging off; an accessory pulled out of the wall on its cables.
- Junction boxes without lids, in ceiling voids, lofts, under floors, in cupboards. The most common find, because the lid saves nobody any time and is the first thing left off.
- Unterminated cable ends: a cable coming out of a wall or ceiling and going nowhere, cut off flush, or with its cores twisted together and taped.
- Cables without protection: passing through metal without a grommet, unsupported across a void, run where they will be nailed through or crushed, or in a chase with no capping before plastering.
- Light fittings and appliances with covers off: a pendant with its rose missing, a fan or heater with the terminal cover removed, an outdoor box with the lid open to the weather.
The one rule: assume it is live
An inspector on a site walk does not have a voltage tester in hand, the authority to isolate someone else's installation, or usually the qualification to say a circuit is dead. So the rule is short. Do not touch it, do not move it, do not open anything further to get a better photograph. Take the wide shot from the doorway and the close-up from a metre away. Do not stand on a wet floor to do it. If it is dripping, or in a bathroom, or within reach of a child, treat it as the most urgent thing in the building.
Then tell someone, in person, before you leave: the site manager, the responsible person, the client. The report is the record; it is not the alarm. "Critical item, live conductors, Bedroom 3, needs isolating today" takes ten seconds to say and is the only part of the job the report cannot do.
How serious is it?
| Found | Severity | Why |
|---|---|---|
| Accessible conductors in an occupied or about-to-be-occupied space; anything in a bathroom, kitchen or outdoors; anything wet | Critical | Shock and fire risk to people who do not know it is there. Isolate today. |
| Open back boxes and unterminated cables in an unoccupied building still under construction | High | Trades are working around it; it must be terminated or isolated and labelled before anyone else works in the room. |
| Junction boxes without lids in voids, lofts and cupboards; cables unsupported or unprotected | High | Reached by the next maintenance visit; a compliance failure regardless of whether it is live. |
| Faceplate cracked or loose but conductors not accessible | Medium | Will become high the first time it is pulled; replace the accessory. |
The field guide puts exposed wiring at critical as a default and lets the inspector argue it down, not up. That is the right direction to be wrong in.
How do you report it?
- Location: room, wall or ceiling position, and height, precisely enough that the electrician goes straight to it and nobody else goes near it.
- What is exposed: conductors, connectors, an open box, a missing lid, and how many cables. Say whether the circuit is identified (a label at the consumer unit) or not.
- Live status: "not established; assumed live". Never "appears dead".
- Immediate action: isolate the circuit at the consumer unit and label it; keep the area clear; do not proceed with other work in the room until isolated. This is the sentence most reports lack.
- The fix: terminate in a proper enclosure by a qualified electrician; fit the accessory, blanking plate or lid; test; issue the certificate. Name the certificate: an installation certificate or minor works certificate in the UK, the permit inspection in the US, the equivalent elsewhere.
- Photographs: one from the doorway that shows the room, one from a metre away that shows the conductors. None from closer.
The box at the end of this article is the full line. It is longer than most items on the report because it carries an instruction for today and a requirement for handover, and it is the one item that should be repeated verbally.
Why does it happen?
Second fix that never finished: the electrician fitted the boxes and pulled the cables, another trade plastered and decorated, and the accessories were never fitted in a room that was then declared complete. Later trades: a kitchen fitter who moved a socket, a decorator who removed faceplates and lost the screws. Junction box lids left off because the void was about to be closed and nobody would see. Alterations by the occupier. None of it is unusual, all of it is found by lifting one ceiling tile, and the reason it matters is that the building looks finished from the floor.
How to check a building in five minutes
- Every accessory in every room: present, fixed, faceplate intact. Count the blanks: a blanking plate is a finished item; an open box is not.
- Lift a ceiling tile or open the loft hatch near the light fittings and look for junction boxes. Lids on?
- Open the cupboard under the stairs, the airing cupboard, the space behind the boiler and under the kitchen sink: where cables converge, lids go missing.
- Outside: every external light, socket and box closed and sealed.
- At the consumer unit: circuits labelled, cover on, nothing hanging out of the bottom. You are not testing it; you are noting whether anyone could.
This is the electrical section of the site inspection checklist, and it sits next to the fire stopping checklist for a reason: the same lifted ceiling tile answers both.
What the fix should be, and what it should not be
Should be: the circuit isolated and labelled immediately; then, by a qualified electrician, the conductors terminated inside a proper enclosure, the accessory fitted, the blanking plate fitted, the lid put on, the cable clipped and protected, the circuit tested, and the certificate issued and handed over. On a new build, no occupation before the certificate.
Should not be: tape. A lid screwed over conductors that were never terminated. A faceplate fitted to hide a box the electrician has not seen. "Made safe" with no certificate and no name. The re-inspection checks the enclosure and asks for the paper; if the paper is missing, the item stays open.
If you do this on sites for a living, the superintendents' page shows how a critical item with a photograph, a location and an isolate-today instruction leaves the phone as its own page of the report, ahead of the forty snags behind it.
Questions people ask
Is exposed wiring always dangerous?
Treat it as if it is. A cable core with no insulation, a back box with no faceplate, a junction box with no lid: any of them may be dead, disconnected or on an isolated circuit, and the inspector has no way to know without test equipment and the right to use it. The report writes it as live and lets a qualified electrician prove otherwise.
Can I put tape over exposed wires?
No, and neither should the contractor. Insulating tape is not an enclosure: it peels, it is not rated for the job, and it hides the problem from the next person. Exposed conductors are terminated inside a proper enclosure, an accessory, a blanking plate, a junction box with its lid on, by someone qualified, and the circuit is tested afterwards.
Who is allowed to fix exposed wiring?
A qualified electrician, and on most work a certificate follows: in England, anything notifiable under Part P needs a registered installer or building control; in the US, a licensed electrician and, for new work, the inspection the permit requires; equivalents apply elsewhere. The report asks for the certificate by name so the fix is not just a lid.
How should exposed wiring be reported on a new build?
As a critical item with an immediate action, not as a snag on a list that will be read next week. Photograph it, write the location and the instruction to isolate, and tell the site manager or the responsible person in person before you leave. Everything else on the report can wait for the meeting; this one cannot.