"The Natural Philosopher" wrote in message
...
Mike Hall wrote:


2. In replacing the wiring to the light switches, I intend to use
the
existing cable to pull through the new stuff, (it is in oval
conduit).
Has anyone got any tips for how to mechanically connect the two
cables, obviously with the smallest possible cross section to
enable
the joint to pass through the conduit. Is insulating tape
generally
strong enough ??


What I do is as follows.

Strip off insulation outer on both.

Cut back all except one condictor and strip that.

fold over that and teh similar one on teh new wire, to make 'U's

Interlock those and twist together hard.

Cover the while joint in insulation tape.

This is about as small as it gets.


And if the conduit, or hole is badly restricted, solder the twisted
ends, not much chance of that coming undone.