UK How do I wire a switch into a lamp with three wires (live, neutral, earth)?

ilikemyhouse1 · May 20, 2023

I've got a security light which has two wires like a normal ceiling lamp (the first wiring diagram attached).

I bought a new security light which has three wires (live, neutral, earth), attched is an image of that.

There is also attached a picture of the current security light with its live and switched live connected.

How do I wire the new light into the three wires?

[ElectriciansForums.net] How do I wire a switch into a lamp with three wires (live, neutral, earth)?

westward10 · May 20, 2023

You are going to need a weather proof joint box to connect the new fitting into.

ilikemyhouse1 · May 20, 2023

Yes I have that, just not sure how to wire the two sets (one live, one from switch) into the security light wiring (the three wires, I know how to do a normal lamp with 2 wires).

westward10 · May 20, 2023

It needs connecting exactly how you have it although it isn't clear which black is actually the neutral. The green yellow needs connecting to the bare earths which are probably concealed by the yellow tape, the bare earths will require green/yellow sleeving.

ilikemyhouse1 · May 20, 2023

Thank you. So talking from the perspective of the new security light, I connect the neutral (blue) to the black neutral and the live (brown) to the switch live and the earth to the bare earth (I bought some green/yellow sleeving as well)?

BenCos18 · May 20, 2023

ilikemyhouse1 said:
Thank you. So talking from the perspective of the new security light, I connect the neutral (blue) to the black neutral and the live (brown) to the switch live and the earth to the bare earth (I bought some green/yellow sleeving as well)?

yep
the bare copper wires in the back of that termail box are the earths btw
and make sure you use a weather proof box for sure

westward10 · May 20, 2023

ilikemyhouse1 said:
Thank you. So talking from the perspective of the new security light, I connect the neutral (blue) to the black neutral and the live (brown) to the switch live and the earth to the bare earth (I bought some green/yellow sleeving as well)?

You don't know which one is the switched live unless you have a means of testing it.