On 27/10/2020 20:59, Fredxx wrote:
On 27/10/2020 20:15:09, me wrote:
What about if I feed the permanent fan supply from a light fitting as
normal with 1.5mm twin and earth cable and then run a 1mm twin and
earth cable from the shower pull switch just for the switched live
feed? That way the fan goes on with the shower pull switch but is not
fed permanently by the shower circuit. Not sure where to fuse though
if it is ok?

Your fan should not be fed from more than one circuit.

If you want it to come on when the shower is on, you would need a relay,
preferably a changeover one (SPDT) that won't put the bathroom light on
at the same time as the fan.

Yup, played that game with a fan setup combining humidistat along with
delayed light activated operation with timed run on:

http://wiki.diyfaq.org.uk/index.php/...d_humidista t

(I had to use the second setup to prevent the humidistat turning on the
light!)


--
Cheers,

John.

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