extractor fan in bathroom

[lee2lee]

Hello, i currently have a crome switch on the out side of the shower room, in the junction box in the loft, should i wire into where the lights are (so fan comes on with lights), take the wire to a spur and then take that to the timer/transformer and then that goes to the fan 12v.


Thanks

 

[bongos]

You will require 3 c+e cable.

Brown from live loop in JB
Black (sleeved brown) from switch return.
Blue from neutral.
Earth sleeved green/yellow from earth terminal.

The live/switch live/neutral should go via a triple pole ioslator.
Brown to L
Black (sleeved brown) to L1
Blue to N.
Earth (sleeved green/yellow) to earth terminal.

 

[lee2lee]

Hi, thanks for the reply.

why do i need to a live/switch live and neutral, i was going to buy one like this >

http://www.astra247.com/5619/Coolin...actor-FanBathroom-100mm-(4)-12V/White/froogle

why cant it just have a constant neutral and then when i switch the lights it gives it a live ? (all running throught the triple pole ioslator)

thanks

 

[GaryMo]

Is there any reason you're opting for an ELV (12v) fan and not a standard LV (230v) timer fan?

 

[lee2lee]

i think someone told me that you cant have a 240v fan in the shower, so i was going for the 12v.

If i do go with the 12v one, can i do it the way i explained ?


ta

 

[flameport]

why cant it just have a constant neutral and then when i switch the lights it gives it a live ?

You need a permanent live as well, otherwise the timer won't work.

With N and switch live, the fan will go on/off with the light.
With the extra permanent live, the fan continues to run for a few minutes after the light is switched off.

 

[lee2lee]

of course, i forot that it would make the timer useless.


ive got a 6a triple pole isolator, is that ok ?

Also, can i fit a 240v fan then in the shower ? i thought it had to be 12v ?

thanks

 

[bongos]

ive got a 6a triple pole isolator, is that ok ?

As long as the MCB/fuse for that circuit is no larger than 6A, then it is ok.

Also, can i fit a 240v fan then in the shower ? i thought it had to be 12v ?

Depends what you mean by "above the shower". If it's more than 2.25m above floor level then it's outside the zones. If it's less, then it is likely to be zone 1 and so will need to be IPX4 rated.