Switch wiring to accommodate a security light (ideally that’s permanently on)

Davies_1980 · Jan 6, 2024

can anyone please advise on where the wires go?

My electrician installed a new cable ready for when I bought a security light. The cable as shown feeds in a two way switch that currently operates the garage light. Only the one switch is used and is connected to a single switch at the other end of the garage.

The next switch in the new unit is not used (I presume ready for the security light).

I am aware that I can attach the neutral and earth to the existing ones shown and the live to the existing com (of the switch that is currently being used), but I want to operate it separately, otherwise the security light will only work when I turn on the garage light (which I established when trying the wiring out).

[ElectriciansForums.net] Switch wiring to accommodate a security light (ideally that’s permanently on)

Avo Mk8 · Jan 6, 2024

If your 2-way switching is wired as below, you don't want to use the com. terminal, but whichever of L1 or L2 is permanent live (possibly the black cable in your right-hand terminal?)

Davies_1980 · Jan 6, 2024

Avo Mk8 said:
If your 2-way switching is wired as below, you don't want to use the com. terminal, but whichever of L1 or L2 is permanent live (possibly the black cable in your right-hand terminal?)

View attachment 112648

Thanks a lot Avo, really grateful. I assume that there is enough room for three cables in the input space?

Avo Mk8 · Jan 6, 2024

Davies_1980 said:
I assume that there is enough room for three cables in the input space?

There should be. Keep them all straight, insert two and then the third - don't twist them all together.
If that doesn't work for some reason, use a Wago!