![]() Finally, use the socket tester again to check the socket is wired correctly. Tighten the terminal screws and fit the new faceplate. Connect the live core wire (or wires - there are usually two, and can be three) to the live terminal (L) of the new faceplate, the neutral to the neutral terminal (N) and the earth (yellow/green) wire to the earth terminal. Use a socket tester to double check the socket is dead before unscrewing the faceplate and freeing the neutral and live core wires. Īgain, the core colours have changed, from red to brown (live) and black to blue (neutral). Don't change these without doing serious homework first. Warning: You must take extreme care when dealing with two-way or multi-way light switches, where more than one switch in the circuit controls the same light. If you are in any doubt, draw a diagram before detaching the old switch. Simply release the live and neutral terminal screws, pull the wires out and connect them to the (correct!) terminals of the new switch. If this is properly attached, you don't need to detach this to change the light switch. ![]() The earth wire (whose yellow-and-green colour is unchanged) should be fixed to the earthing terminal of the light switch's metal mounting box. In photo B, you see a single, one-way light switch with old-coloured wiring. "COM" or "Common" is the terminal to which the live core wire is attached - this is the brown wire (formerly red). ![]() Splice all neutral wires together, but without a pigtail. The faceplate of a single, one-way switch has two terminals: "L1" is the terminal to which the neutral core wire is attached - the blue wire (traditionally black, before the change). Splice the black power wire and the new black wire from the new 3-wire cable together, with a black pigtail added. Once you are certain the power for this circuit is off, unscrew the switch "faceplate" and gently pull it out so you can see the connected core wires behind. You can check that the circuit is dead using a plug-in socket tester or, for a lighting circuit, a voltage tester.Ī single, one-way light switch is the simplest arrangement of all: one light is controlled by just this one switch, making replacement of the switch relatively simple. To be extra safe, isolate the particular circuit you wish to work on by removing its circuit fuse (and putting it somewhere memorable!) or switching off and locking the relevant circuit breaker. Note: Before you start either job, you must switch off your home's power at the main fuse box. ![]()
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