Replacing extractor fan wired to light switch

[enemsea]

Hi

I am replacing an extractor fan that has been wired to the switch rather than the ceiling rose.

How can I use an extractor fan with a delay timer with the minimum fuss in terms of wiring?

enemsea

 

[Andy™]

if its been taken from the switch, then there will be same connections as there would be at the light

may need a 3c+e to the switch tho, but if tis easier, you could take it to the light (providing there is a neutral there)

 

[enemsea]

The current fan cannot be switched independently of the light, which is the problem. Is there a way of rectifying this without running a new 3c+e to the switch?

 

[NozSpark]

Yes,

get a PIR operated fan with a run on timer and leave the switch "on"

 

[Andy™]

The current fan cannot be switched independently of the light, which is the problem. Is there a way of rectifying this without running a new 3c+e to the switch?

add another switch next to original and use that for the fan. or change to a 2gang if its a normal switch

If you want it to run in timer, you may be able to move the timer to the switch side, failing that, itll need a 3c+e

 

[NozSpark]

If your current light is fed from the switch and not the fitting then you will have a live, switched live, neutral and earth at the switch; your fan will be connected to the switched live, neutral & earth. If you move the fan supply from the switched live to the live and swap the fan for a PIR fan then you will have a fan which operates when someone is in the bathroom and switch off when the delay has timed out.. You could also fit a new switch close to the existing one to isolate the fan when you don't want it to work..