Fitting a bathroom with timer

[757man]

Hi there,
Just after a bit of friendly advice

Brought a bathroom fan with a timer. I also have a 3 amp FCU (required by manufacturers instuctions and DP fan isolator switch. I plan to have the fan turn on with the lightswitch.

Whats the best way to wire this up to the existing lighting circuit?

My original intention, was to take the live, neutral and earth from the junction box in the loft to the fcu and then to the DP isolator, as follows:

>Earth from FCU to Fan

>Live from FCU to L1 of DP Isolator, then L1 of DP isolator to fan( becoming Live perm)

>Neutral from FCU to N of DP Isolator, then N From DP isolator to fan

>L2 of bathroom lightswitch to L2 DP Isolator, then L2 from DP isolator to fan(becoming switched live)

Any advice appreciated, no sarcy comments please. I am purely after advice, not negative comments.

many thanks

 

[AndyPRK]

With the components you have what I would do is.

Mark, photo, take notes of wires at the light.

Remove wires from light and fit to junction box in loft.

Fit fuse unit in between junction box and light.
Locate it on the landing.

Buy 3 pole isolator and fit in bathroom.
Wire between light and fan with 3 core and earth cable.


Something like that.


Do a search. Been discussed many times.

2 ways of doing it basically, although one without the fuse which is rarely fitted.

 

[OwainDIYer]

See the bottom two diagrams here
//www.diynot.com/wiki/Electrics:fan
you will need a double pole switch

 

[ban-all-sheds]

>Live from FCU to L1 of DP Isolator,

That's one pole.

>Neutral from FCU to N of DP Isolator,

That's a second pole.

>L2 of bathroom lightswitch to L2 DP Isolator,

And that's a third pole.

I also have a ... DP fan isolator switch.

 

[757man]

Sorry my mispelling, Its a triple pole isolator I have.

 

[757man]

Ive decided not to go with the original idea I had.

instead ive brought a PIR extractor fan, will be much easier to fit and wire.

Im taking a 3 amp switched FCU off the lighting circuit, then straight to the fan.

this is the product ive ordered:
http://www.tlc-direct.co.uk/Product...=adwords&kw=&gclid=COi8zvm69L4CFcXKtAodiTkAZg

 

[ban-all-sheds]

OOI, do you really need the fan to start up every single time someone goes into the bathroom, no matter why?

 

[phatboy]

Agree with BAS, could be annoying going for a quick wizz in the night, and the fan starts up.

Your first plan was better!