![]() ![]() Most room lights are controlled by wall mounted toggle switches (although alternatively touch sensitive or rotary light dimmers can be fitted), The cable normally runs down the wall within conduit within the plaster. Some light units incorporate their own switch, for these fittings, the power circuit is then connected directly to the fitting. The power to each lamp is connected via a wall or ceiling mounted switch. The lighting cable is routed from the consumer unit to a series of lighting points for ceiling roses or wall light fittings. When connecting the cable, the exposed earth connector must be covered with a sleeve coloured yellow and green (to denote that it's an earth). The three conductors are laid side by side within a PVC sheath. It consists of a red insulated core for live, black insulated core for neutral with a bare earth conductor between them. The cable used is a 1sq mm PVC twin core and earth rated for up to 12 amps. The consumer unit is normally connected to the first lamp, which in turn is connected to the second lamp and so on. ![]() Unlike the ring power circuit, the lighting circuit does not form a loop returning to the consumer unit. Shaver units may also be connected to the lighting circuit (treat it as equivalent to one 100 watt lamp) - where installed in a bathroom or a room containing a shower, the shaver unit must incorporate an isolating transformer. A single 5/6 amp circuit can cope with up to twelve 100 watt lamps, it is usual in a multi-storey house, to have at least one lighting circuit for each floor even if the number of lamps are less than 12 on each level. Each house should ideally have at least two lighting circuits each protected by a 5 amp fuse or 6 amp trip in the consumer unit. In modern domestic properties in the UK, the main electric lighting circuits are separate from the power ring main circuit. From 1st January 2005, the Building Regulations Part P requires, in England and Wales, that only certified personsĬan carryout electrical installation work, or the work must be certified upon completion - see thisĪlways isolate any electrical circuit before working on the circuit. ![]() Please note that all electrical wiring and installation details given on is for information ![]()
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