DIYbanter - View Single Post

wrote:

Looking at a nearly completed extension the other day, I noticed that
there were two separate cables awaiting connection in each light switch
patress, one being a live feed and the other going to the light
fitting.
I know how lighting is wired in the style where one cable carries a
live feed through the switch back to the junction box then to the lamp,
but how is this style wired up?
Thinking about it, there seems to be one connection point short using a
conventional light switch.

There is.

Common the neutrals using a connector block, and maybe the earths as
well, but take a 'tail' from that to earth to the switch metal, and use
L1 and common for the two reds (or whatever colour they are these days)