Fan isolator query

grousedogtom

Hi , what is the norm when installing 4 inch standard extractor fans in bathrooms, is the triple pole isolator fitted up high on wall outside bathroom,if so what switches the fan?Ill be connecting them from the lighting circuit which is fed from a 10amp rcbo,thanks in advance.

meercat

isolator should be in the bathroom
3pole(permanent live ,neutral and switched live)switch

switch the fan from outside the room(2 gang usually,one for light one for fan)
then break the fan circuit in the isolator

grousedogtom

Ok thanks,fans are going on bathroom ceiling,is it ok to mount a standard 3 pole fan isolator on wall inside bathroom near the fan?

meercat

grousedogtom wrote: »

Ok thanks,fans are going on bathroom ceiling,is it ok to mount a standard 3 pole fan isolator on wall inside bathroom near the fan?

once it is in the relevant zone

i always have trouble finding a suitable location for this isolator as sometimes there are location changes for baths,sinks ,showers etc when 2nd fix plumbing begins so the best location if suitable is over the door

i try to fit inline fans where possible instead thus there are no electrical connections for the fan in the bathroom so no need for an isolator there(i fit one in the attic beside the fan instead)

JOHNPT

All isolators I have seen or have fitted were located outside the bathroom (usually over the light switch/height = top of door)- have yet to see an isolator in the bathroom.

grousedogtom

JOHNPT wrote: »

All isolators I have seen or have fitted were located outside the bathroom (usually over the light switch/height = top of door)- have yet to see an isolator in the bathroom.

Same as that, but that kind of defeats the purpose of a local isolator if it's outside the room the fan is in.

Diggerdunne

grousedogtom wrote: »

Same as that, but that kind of defeats the purpose of a local isolator if it's outside the room the fan is in.

But you have to walk by the isolator as you enter the bathroom so its local enough unless you have a huge bathroom and it takes ten mins to walk back to the door from the fan if you want to isolate it....

Bruthal

grousedogtom wrote: »

Same as that, but that kind of defeats the purpose of a local isolator if it's outside the room the fan is in.

Well not really. The only place to isolate the supply of a timed fan would be at the DB if there was no isolator. One above the door outside would usually be good enough to enable working on the fan without the isolator being switched on by someone else.

grousedogtom

OK if fitting the isolator outside couldn't you just fit it next to the light switch using a dual box and use the isolator to switch the fan also

M cebee

i noticed on rules page 308 it says wall mounted sockets and switches prohibited in bathrooms?
Dunno if that means fan isolators not allowed inside?
I usually put them up over light switch anyhow

M cebee

grousedogtom wrote: »

OK if fitting the isolator outside couldn't you just fit it next to the light switch using a dual box and use the isolator to switch the fan also

A fan requires an isolator in its vicinity and control of a fan is separate to isolation

2011

M cebee wrote: »

A fan requires an isolator in its vicinity and control of a fan is separate to isolation

+1

grousedogtom

I put fan on 1 leg of 2 gang outside bathroom, switch wire and neutral fed to fan isolator high up over light switch and from isolator onto fan, thanks for all above advice etc, nice to hear different opinions