Bathroom extractor fan !!

dpmc · Posted: Sat Sep 16, 2006 12:21 pm Post Subject: Bathroom extractor fan !!

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 · Posted: Sat Sep 16, 2006 12:42 pm Post Subject:

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?

__________________
Being a professional doesn't mean I'm any good - just that I get paid for doing it!

ban-all-sheds · Posted: Sat Sep 16, 2006 3:57 pm Post Subject: Re: Bathroom extractor fan !!

dpmc wrote:

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?

Quote:

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.

__________________
I mustn't warn people that the "experts" on the plumbing forum can't be trusted to tell the truth.

dpmc · Posted: Sat Sep 16, 2006 5:39 pm Post Subject:

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 · Posted: Sat Sep 16, 2006 7:44 pm Post Subject:

dpmc wrote:

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.

__________________
As George Michael once said, "..if you're gonna do it, do it right, right?"

dpmc · Posted: Sat Sep 16, 2006 8:02 pm Post Subject:

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 · Posted: Sat Sep 16, 2006 8:04 pm Post Subject:

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?

__________________
As George Michael once said, "..if you're gonna do it, do it right, right?"

Taylortwocities · Posted: Sat Sep 16, 2006 9:33 pm Post Subject:

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 · Posted: Sun Sep 17, 2006 1:02 am Post Subject:

dpmc wrote:

not sure what any of that means!

Then you should not be doing this.

__________________
I mustn't warn people that the "experts" on the plumbing forum can't be trusted to tell the truth.

sparkacus · Posted: Sun Sep 17, 2006 6:36 am Post Subject:

dpmc wrote:

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 · Posted: Sun Sep 17, 2006 10:02 am Post Subject:

thanks,

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

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