Bathroom extractor fan !!

dpmc · 16 Sep 2006

Help!

I have one fan with 2 black wires (presume it\\\'s AC)and wanna wire it so it comes on with the light.

Can I connect yellow into one,
and blue into another,

I presume I should somehow connect the live red to something but there ain\\\'t nowhere to connect it in the fan!
(Bathroom light switch is outside the room so no pull chord.)

Any advice is appreciated!!!

didthathurt · 16 Sep 2006

We'll need a better mental picture than you've given so far.

Where are the yellow and blue cables you refer to coming from, for starters.? Is this a replacement fan?
Do you have only the light switch and the light at the moment?
Where, relative to the bath/shower do you intend putting this fan?

ban-all-sheds · 16 Sep 2006

dpmc said:
I have one fan with 2 black wires (presume it\\\'s AC)and wanna wire it so it comes on with the light.

You talk as if this is a new fan, as it's not connected up? If so, don't you know what it is?

If not, and you are right in your assumption, and it's rated at 230V AC, you'll be OK. But stand back when you switch it on, just in case you are wrong and it explodes.

I take it as well that you have checked that it is suitable for the location?

Can I connect yellow into one,
and blue into another,

I presume I should somehow connect the live red to something but there ain\\\'t nowhere to connect it in the fan!

It sounds as though you have the wiring for a timed overrun fan, but not that sort of fan, so the permanent live (probably red, but no guarantee, however this is trivial to check with your multimeter) needs to be made safe in a piece of choc-block.

dpmc · 16 Sep 2006

Thanks for replying,

yes, I'm replacing a fan that was old and broken, so the location is all ok. (There is only one light switch situated outside the room - I hope the yellow switched live is connected somehow to it)

The three wires (red yellow blue) coming out the wall were attached to the old fan. I removed them, replaced the old fan with the new, but the new only had the 2 black wires. I think I left the yellow free- what happened then, was that the fan was permanently on.

The fan is a EMMA (!?) emf4 standard model, 220-240v 50 hz, 20 watt. It was cheap...

So, if I sort out a piece of choc-block for the red wire coming out the wall.... do you think it'll work?

thanks for your advice!!

securespark · 16 Sep 2006

dpmc said:
yes, I'm replacing a fan that was old and broken, so the location is all ok.

Doesn't neccessarily follow, I'm afraid.

If your fan is in a certain position, it should either be IPX4 rated and protected by an RCD, or an SELV model.

dpmc · 16 Sep 2006

not sure what any of that means!

It only says eMF4 on the box. No idea what that implies either.

Not in a rush,so I wont act til I know what's going on.

securespark · 16 Sep 2006

Where is the fan in relation to the bath/shower cubicle?

Need measurements, please.

Has the fan got an "IP" rating on it?

Is it protected by an RCD?

Taylortwocities · 16 Sep 2006

Sounds like the old fan was a timer type and the new fan is not a timer type (ie, the fan runs on after the light has been switched off).

Assumings its a none timer type (only two terminals, maybe marked L & N??)
Put the blue wire into the N terminal, put the yellow wire into the L terminal. Insulate the red wire using a small choc block. The fan should now come on when you switch the light on.

ban-all-sheds · 17 Sep 2006

dpmc said:
not sure what any of that means!

Then you should not be doing this.

sparkacus · 17 Sep 2006

dpmc said:
not sure what any of that means!

It only says eMF4 on the box. No idea what that implies either.

Not in a rush,so I wont act til I know what's going on.

Agree with BAS on this one. Sounds as though you should contact a qualified electrician. It could also come under "P Regs" if it is in your bathroom!!!

dpmc · 17 Sep 2006

thanks,

It's above the sink which is next to the shower.

According to the diagrams, it's in zone 2 which is IPX4!

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Bathroom extractor fan !!

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