Extractor Fan in bathroom

phantom1129 · Mar 31, 2012

i want to fix an extractor fan in a bathroom. i cannot vent through the roof so can only vent through the outside wall and then only directly over the bath which is in zone 2.
the extractor will be about 1.5 metres above the bath
i intend to power off the lighting circuit which is already protected by an RCBO 6 amp.
is it ok to fit a 240v extractor (as i have the RCBO) or is a 12v required.
i would welcome your thoughts.

Richard Burns · Apr 1, 2012

Guitarist said:
A court case.... The guy who fitted a fan on a 6A MCB and it burnt out causing a fire was prosecuted for not following manufacturers instructions. That is why 3 amp MCB's are now made.

I have some 3A MCBs that must be at least 15 years old so not a new innovation, just the resurfacing of an o1d idea.

DurhamSparky · Apr 1, 2012

i would probably lodge a counter claim to the manufacturer of the fan about why it burnt out!! its got to go faulty to catch fire... and if it goes faulty it will blow a 3a fuse and drop a 6a mcb if it shorts as the current overload will be massive..!

Guitarist · Apr 1, 2012

Richard Burns said:
I have some 3A MCBs that must be at least 15 years old so not a new innovation, just the resurfacing of an o1d idea.

Agree mate. I should have said "Now being made again" and even feature in the regs now, which they didn't before.

Guitarist · Apr 1, 2012

DurhamSparky said:
i would probably lodge a counter claim to the manufacturer of the fan about why it burnt out!! its got to go faulty to catch fire... and if it goes faulty it will blow a 3a fuse and drop a 6a mcb if it shorts as the current overload will be massive..!

Common sense would agree with you. However, the point was he contravened the regs by now following manufacturers instructions... A point I keep making when people say they can get away with 6mm on an 8.5 KW shower. Maybe you can, but many instructions now tell you to only use with 10mm cable.

DurhamSparky · Apr 1, 2012

agreed....!! ^^^^ 7.2kw MAX i fit on 6

TaffyDuck · Apr 1, 2012

[ElectriciansForums.net] Extractor Fan in bathroom

DurhamSparky said:
probably not as you would have to Fuse BOTH live conductors and it would make it bulky and it would have to be made larger to fit a 2g back box rather than single...!

You could fuse a comm then com feeds L1 so would only need 1 fuse, maybe have to make the switch a little smaller to accomodate the fuse

BillyH · Apr 1, 2012

lighting feed into sw fused spur (3a fuse),load to bathroom light,twin to pull sw and 3core from bathroom light to fan.I know the bathroom would be in darkness if switched the spur off but, so what. Would satisfy most cases

circuitsolution · Feb 1, 2013

Very handy for me as well. I had same problem. I had to install extractor fan in zone one on a pitch roof in loft extension.is IPX4 suitable. I will be grateful for any help

Extractor Fan in bathroom

phantom1129

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Richard Burns

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DurhamSparky

Guitarist

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Guitarist

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DurhamSparky

TaffyDuck

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BillyH

circuitsolution

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