Extractor fan wiring. Is this correct?

[masmith79]

Ok. I'm about to install a humidistat extractor fan into a downstairs bathroom. I think I've got the wiring sorted, but would just like that final "yes, that's ok" before I start.

Anyway, here's a pic I drew to help me with the wiring. (no earth in picture just to simplify things! It will be there when i install it!) :

Basically, the feed comes from the lighting circuit and enters junction box 1, which has the standard lightswitch/light branches, I branch out of this junction box to a 3Amp, double pole, isolating switch (outside bathroom), which then goes into junction box 2.

Junction box 2 then sends a live to the second connector in the light switch to act and the "switched live" for the fan as well as sending a continuous feed via the non switched lived and neutral (which can be cut off using the isolating switch)

The fan will be humidity controlled as well as via the light switch.

Does this look ok?[/img]

 

[GaryMo]

Use a 3 pole fan isolator and route the switched live from the lighting through it as well as your permanent live and neutral.
That way the fan can be safely isolated.

 

[masmith79]

Use a 3 pole fan isolator and route the switched live from the lighting through it as well as your permanent live and neutral.
That way the fan can be safely isolated.

So, on the picture, it would sit between junction box 2 and the fan, instead of between the two junction boxes? (sorry i find illustrating instructions easier to understand and clarify)

 

[GaryMo]

Run a 3c+e from the light fitting (assuming there's a permanent live present) through a 3 pole isolator to the fan.

You'll then have a permanent live (for humidistat and timer overun), a switched live (for operation with the light) and a neutral. All three conductors can then be safely isolated with the 3 pole isolator.

 

[masmith79]

Ah, thanks, much simpler that way too.

 

[GaryMo]

You've got it!

 

[SparkyNinja]

Looks sound.

Good illustrations,

and good advice GaryMo.