But if for some reason all of the wiring have been taken apart then a voltage tester will need to be used to identify what all of the wires are used for.
Wiring a wall light fixture uk.
Remove the knockout cover and secure the cable clamp inside the opening on top of the light fixture then insert the unsheathed wires of the cable into the cable clamp.
Remove the cover plate on the fixture to reveal the ballast the starter the socket and the wiring.
The easiest way to add new light fixtures is to run the new wiring to the existing light fixture splice the wires together as the old fixture was connected and then place a decorative blank cover over the fixture box.
I always recommend that when changing out a light fixture that you only work with the wires that are connected to the existing light fixture and then the wiring is straight forward.
Arlington makes a white blank fixture box cover that works very well for this type of application.
Instead of taking the feed wire from the consumer unit to the ceiling rose it is taken to the switch.
Have a helper hold the rest of the fixture while you connect the wires.
The neutrals are connected together using a terminal connector.
Connect the wires as they were in the old fixture.
Then turn on the light switch with all power off to the lighting circuits there is no power to the switch.
Wire black to black and white to white.
When all colored wires are inside the fixture tighten the cable clamp.
In this step by step vide.
This is an alternative way of wiring a lighting circuit.
Attach the fixture over the box wire the fixture and attach the cover.
The permanent live wire is wired into the switch and the switched live into the switched live terminal.
Using the diagram above this would mean either cable 1 2 or 3.
The ground wire is the bare copper wire and should be connected to the green grounding screw in the crossbar.
When replacing a wall light or sconce it s important to plan ahead and ensure that your new light is looking and working its best.