3 core and earth for extractor fan

VDFUser22

What cable is suitable with the recent regs for connecting an extractor fan with isolation switch to the existing switch for a ceiling light?

VDFUser22

Anyone got any input? I was expecting to be able to get some 3 core and earth cable to power a 3A fused isolation switch connected to the fan from the existing light circuit but this wiring isn't available anymore. Screwfix have some 4 core flex cable but that's only 1mm and I understand I should use 1.5mm.

I was thinking I could use one length of cable going for the switched live and another for the live.

Deagol

https://www.meteorelectrical.com/cable-and-cable-management/cables/3-core-earth.html

VDFUser22

https://www.boards.ie/discussion/comment/121540542#Comment_121540542

Thanks but I think that cable doesn't meet the new regs because the earth is bare and not the same dimensions as the live carrying wires.

CrazyEric

If you have a 3A fuse in the spur then 1.0mm would be suitable as it is rated up to 10Amps.

Deagol

• Cable size: 1.5mm 3 Core and Earth Cable

I was only telling you where you can get the cable you referenced in your post. No comment on legalities of using it. i will say i still see T&E with bare earth for sale everywhere...

VDFUser22

But would I still need 1.5 to get to spur / fused isolation switch?

horseman34

Would 4 core heat resistant flex be an option

VDFUser22

It could be an option but I'd like to know what cable an electrician would use to comply with the new standard.

VDFUser22

Maybe this is what I need, NHXMH-J 4 core?

https://www.eurosales.ie/products/nhxmh-j-cable-nhxmh-j-eca.html