Replacing a light switch

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Selecting a replacement light switch

If a switch needs to be replaced, because it is damaged or you require one of a different style, be sure to buy one with the same function. For example two gang, two way. Also, make sure with a surface mounted switch that it matches the profile of the mounting box. If not, you will need to buy a suitable box as well.

Removing the old light switch

Switch off the power supply at the consumer unit and remove the fuse for the circuit.

Release the faceplate retaining screws and ease the switch away from the wall.

It is essential that the new switch is wired up in the same way as the old one. This will be straightforward enough if you have a single gang one way type, but those with several switches and/or ways, will have many wires which can be confusing.

Identifying the wires or cables

The simplest way is either to label each conductor with the location of the terminal to which it connects as you release it or to transfer one conductor at a time to the corresponding terminal on the new switch.

Before refixing the switch, double check your connections.

Once you are sure that all work has been completed correctly, replace the fuse for the circuit, switch the power back on, and test.

• Switches
• Lighting circuits
• Connecting cable