Changing a bathroom extractor

[Aquaman]

I'm looking to change my current bathroom extractor fan, to a new one with a better extraction rate and humidity sensor.

I have settled for this one

http://www.extractorfanworld.co.uk/...hroom-fan-with-humidistat-sil100ht-3193-p.asp

The current fan operates uses the lighting pull switch (comes on with lights, stays on with built in timer when lights go off) I have done a straight swap before with no problems, but this new one says it needs a double pole and has no earth connection (Class 2??) Does this mean I can't fit with current wiring set up?

thanks in advance for any answers

 

[ban-all-sheds]

Connect it to the permanent live & neutral, terminate the switched live & earth in a bit of choc-block inside the fan housing.

 

[Aquaman]

Connect it to the permanent live & neutral, terminate the switched live & earth in a bit of choc-block inside the fan housing.

but the only wiring to the current fan is red, blue and earth??

 

[AndyPRK]

let us know if your impressed with it (air flow etc)

 

[Aquaman]

let us know if your impressed with it (air flow etc)

Will do Andy

But with just the three wires to the current fan (red,blue,earth)

1.Can I fit the new one using the exsisting wiring?

2.Without fitting double pole switch?

3.What to do with earth connection?

 

[AndyPRK]

I think a pic of the wiring to your current fan would help.

You should have a yellow wire there.

 

[ban-all-sheds]

IPX5 rated waterproof motor - Install in any bathroom zone
Well, not quite any one

 

[ban-all-sheds]

but the only wiring to the current fan is red, blue and earth??

In that case this:

The current fan operates uses the lighting pull switch (comes on with lights, stays on with built in timer when lights go off)

is extremely worrying.

For a fan to work like that it must have permanent live, switched live and neutral. So if the cable only has 2 cores plus earth some idiot must have used the earth core for one of the lives or the neutral.

Which is very very bad, possibly dangerous, possibly lethally so if the wiring is ever worked on by someone who doesn't know what they are doing.

I cannot urge you too strongly to get an electrician to look at it asap.

 

[AndyPRK]

is extremely worrying.

For a fan to work like that it must have permanent live, switched live and neutral. So if the cable only has 2 cores plus earth some idiot must have used the earth core for one of the lives or the neutral.

I'm not as quick to judge as you Ban, as you can't get 2 core and earth cable with colours Red and Blue, so I think 3 core and earth is present.

I'm hoping the OP has mistaken the yellow for an earth? But that is why I requested a picture.

 

[ban-all-sheds]

but the only wiring to the current fan is two core and earth

but the only wiring to the current fan is colour 1, colour 2 and earth

The problem does not go away.

 

[ban-all-sheds]

I'm hoping the OP has mistaken the yellow for an earth?

Well as it's connected to L or SL or N, then if he thinks it's an earth I would still say "please get an electrician".

 

[Aquaman]

I think a pic of the wiring to your current fan would help.

You should have a yellow wire there.

Extractor Wiring

• Aquaman
• 21 Oct 2014
• 1

My mistake it is just yellow.

 

[AndyPRK]

"please get an electrician" is your default answer though

 

[AndyPRK]

Thanks for the pics.

As i suspected, that yellow is not an earth but a live (switched live hopefully, i.e when your bathroom light is on its live)

 

[AndyPRK]

Connect it to the permanent live & neutral, terminate the switched live & earth in a bit of choc-block inside the fan housing.

but the only wiring to the current fan is red, blue and earth??

Usually

Red is Live
Yellow switched live
Blue neutral

But red and yellow can get mixed up.

The earth has already been trimmed