Wiring Regs for "always on" bathroom extractor fan

Calahonda52

Looking at putting in an always on bathroom extractor fan that will boost when the humidity level increases above a preset trigger point.

There is no fan there now.
In many new houses with bathroom fans I see a wide isolation switch, mostly over the door.

Do the regs require such a switch for all bathroom fans, my concern is it will just be turned off.
Thanks

Hoagy

Yes, a three pole isolation switch is required, usually over the door to avoid switching off by accident.

17larsson

Hoagy wrote: »

Yes, a three pole isolation switch is required, usually over the door to avoid switching off by accident.

New regs state that the isolator must be at switch height (No higher than 1200mm)

Calahonda52

Much obliged.
So it seems not much comfort there of making sure it stays on.

This is the current wall vent

Hoagy

17larsson wrote: »

New regs state that the isolator must be at switch height (No higher than 1200mm)

I haven't heard of that, can you clarify?

17larsson

Hoagy wrote: »

I haven't heard of that, can you clarify?

I don't have the rule book with me here but it is in it. The RECI inspector told me about it also

meercat

Hoagy wrote: »

I haven't heard of that, can you clarify?

530.6
Switches must be between 400mm and 1200mm.
Got pulled up on fan isolator switch by my inspector too.

Hoagy

Thanks guys, that seems to be a RECi interpretation.

I'd have thought that a fan isolator is not a switch, it's an isolating device as required by 555.5, the functional switch being the light switch.

Calahonda52

Hoagy wrote: »

Thanks guys, that seems to be a RECi interpretation.

I'd have thought that a fan isolator is not a switch, it's an isolating device as required by 555.5, the functional switch being the light switch.

Cant say having it makes much sense if you have an always on trickle fan so easily turned off

gctest50

Calahonda52 wrote: »

Cant say having it makes much sense if you have an always on trickle fan so easily turned off

you need an isolater that has changeover contacts

wire other contacts to warning siren

2011

A fan connected to a blocked vent such as the this (from post #4) is not going to achieve anything:

Bruthal

Its like one of those aliens from the alien films coming out of that.