Help With Wiring Home Air Extractor!

[JimmiD]

Just moved into a new property.
It has a air exhaust Fan, controlling both the cooker hood & Bathroom, but none of the wires are connected up.
It has a fused switch box, a cable from the the unit that goes into the box, with 4 wires : Brown, Black, Blue, Green/Yellow, and a cable that comes through the wall in the top of the box, with 4 wires : Red, Yellow ,Blue ,Green/Yellow (sleeved/bare).
The fused switch looks like this, and the box itself has a isolated earth connection :

SUPPLY | LOAD

E N L | N L E


e=earth sign

Any help in wiring this up would be appreciated.

Jimmi[code:1][/code:1]

 

[comms]

When you say new, do you mean it's a new build ?

 

[Steve]

I doubt it, as at least one of those cables is old colours.

 

[ColJack]

only one crafty... look again...

brown, black blue earth is old colour 4 core..

 

[Steve]

Ummmm . . . Why do we have some

Red, Yellow ,Blue (old 3ph colours)

in a switch drop in our house, which was wired early 90's then?

Surely the new colours are brown black and GREY (OP error?)

 

[ColJack]

brown, black and blue were the old 3 phase FLEX colours.. or 4core flex ( 3 phase and earth )

since the cable is from "the unit" i would guess that it's a pre-wired fan..

 

[Steve]

Christ - theres so many variations of old colours etc! I shouldn't have got involved lol!

 

[JimmiD]

No it's not new build. 60's I think.

The Fan is a A.B.B JBDC/CPAV, I think it's swedish, just make it more complicated. The fan is already wired with flex coming out bottom of it's housing.

I expect this was wired in ages ago, pre 90's. But switch is fairly new.

Jimmi

 

[ColJack]

someone screwed up there then..

it is most likely to be fed from the lighting circuit.

it should be a 3 pole fan isolator, not a fused spur I think

a picture of the fan and FCU would be of great use to us to help with this..

 

[JimmiD]

Photos of the installation as requested:

Thanks For any help.


Jimmi D