The Natural Philosopher wrote:
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)

Thanks. So one has to put a connector block in the back box?
How is this better than using junction boxes in the ceiling void, or am
I missing something?