"BillR" wrote in message
...
igloo wrote:
Hi all,
I bought an extractor fan and have since build it into the wall and
now I must wire it up to the light. Is there any pitfalls/ advice to
look out for? It's the type that comes on when the light is switched
on.

Thanks

It will need a 4 core cable. Earth, live, switched-live and neutral wired
to
the ceiling rose.
Strictly speaking you should wire it through a double pole fused
connection
unit but many people do not seem to bother with this...

The fan will only require 4 core (1mm2 3 core and earth) if the fan is a
timer over run version. Use 3 core (or 2 core 1mm2 T&E if it has no timer
overrun)The cable should pass through a triple pole isolator to do this
properly on a timer overrun version. If the fan has no timer then the cable
may go through a double pole switch or double pole fused connection unit

--
Adam