Is an isolater switch for extractor fan required?

[bloxy]

So doesnt the fan have a timed overrun?

Yes.

Lights and fan/light are switched separately, lights on 2 pole pull cord and fan/light on single pole pull cord.

 

[ban-all-sheds]

you might get a bad leg and be unable to climb into the loft

Or get run over by a bus tomorrow.

 

[Steve]

So doesnt the fan have a timed overrun?

Yes.

Lights and fan/light are switched separately, lights on 2 pole pull cord and fan/light on single pole pull cord.

So the supply to the fan/light must go through the FCU, then to the pullcord? The only way it would work correctly.

Why switch it seperately?

 

[ban-all-sheds]

If it goes through an FCU to its own switch then the FCU will do the same as a 3-pole isolator placed after the switch...

 

[bloxy]

Remember this is a shower-fan/light with a SELV halogen light in the vent over the shower and an in-line fan in the loft venting to the eves. Hence the isolation is by the fan in the loft.

Yes it goes through the FCU first and then to the switch, the shower-fan/light unit instructions specified this with a 3 A fuse. The switched FCU isolates the entire shower-fan/light and switch circuit. Yes a 3 pole isolator after the switch would give the same isolation but wouldn't fuse down as per the spec.

It's switched separately from the other lights so you can have the fan and shower light on when you are in the shower(with 10 min over run) but not when you pop in for a pee and only need the other lights.

 

[bloxy]

Or get run over by a bus tomorrow.

If I get run over by a bus my wife knows where they are and if we both get run over by a bus I don't care!

 

[JohnD]

as you get older you are certain to become less agile

you are not certain to be run over by a bus.