In article ,
wrote:
I've never understood why some do it this way as it wastes cable. Far
better to run the normal switch pair to one switch, then a triple and
earth to the other.

Probably because lots of people don't have triple and earth quickly to
hand.

Suppose they don't bother with grommets or sleeving then since that's not
to hand either?

--
*When cheese gets it's picture taken, what does it say?

Dave Plowman London SW 12
RIP Acorn