If the faceplate is made of metal, cut a short length of earth core from 1.5 mm² cable and run it between the earth terminals of the faceplate and mounting box. Replace the faceplate. Step 4

Where consumers tails are protected against fault current by the distributors cut-out, the method of installation, maximum length and minimum cross-sectional area (csa) of the tails must comply with the requirements of the distributor. The IET’s technical helpline receives a wide range of frequently asked questions. Here are just a few of the common questions received. Room containing a bath or shower Regulation 411.3.1.1 states: “a circuit protective conductor shall be run to and terminated at each point in wiring and at each accessory except a lampholder having no exposed-conductive-parts and suspended from such a point.” See BS 7671 for more information. Steel wired armoured cables An extractor fan supplied from a lighting circuit for a bathroom without a window should have its own means of isolation, as otherwise replacement or maintenance of the fan would have to be carried out in the dark. An isolation switch for a fan with an overrun facility will need to be triple-pole (switch wire, line and neutral), and must be installed outside zones 0, 1 and 2. Supplementary bonding

Steel wired armoured cables

All final circuits of the location have additional protection by means of an RCD in accordance with Regulation 701.411.3.3. Are 230 V light fittings permitted above a shower or bath (zone 1) in a room containing a bath or shower? A plate switch is allowed outside the zones of a bathroom. A switch must be suitable for the location. The cords of cord-operated switches are allowed in zones 1 and 2 and are recommended for bathrooms and shower rooms. Luminaires (light fittings)

Buried cables, conduits and ducts shall be at sufficient depth to avoid being damaged by any reasonably foreseeable disturbance of the ground. A depth of less than 0.5 m is usually inadvisable. See Regulation 522.8.10 of BS 7671 for more information. Earthing at lighting pointsAll final circuits of the location comply with the requirements for automatic disconnection according to Regulation 411.3.2. Yes, a suitable 230 V extractor fan may be installed in zones 1 and 2, and outside the zones. If an extractor fan is installed in zone 1 or 2 it must be protected against the ingress of moisture to at least IPX4. Regulation 701.415.2 (last paragraph) allows supplementary bonding to be omitted where the location containing a bath or shower is in a building with a protective equipotential bonding system in accordance with Regulation 411.3.1.2 and provided all of the following conditions are met: vi) A metal conduit, metallic cable management system or other enclosure or electrically continuous support system for conductors Note: The designer will still need to determine if the armour is suitable to be used as a CPC. Meter tails