DIY Doctor

Neutral as Earth

Postby zzbthi » Tue Nov 29, 2011 2:51 pm

I'm replacing a faulty bathroom fan that was installed prior to me taking ownership of my flat.

When removing the old fan prior to installing the new one I noticed that instead of using an earth wire, a second neutral wire had been connected to the earth screw on the device.

Although this is most certainly contrary to wiring regulations, is this unsafe to:
- the user (given that the device is operated by a pull cord only); and also
- the device itself - can it cause damage?

Thanks for your help.

Rank: Labourer
Progress to next rank:
Posts: 1
Joined: Tue Nov 29, 2011 2:43 pm


Simply Build It

Postby sparx » Tue Nov 29, 2011 7:42 pm

Hi this seems most unlikely to be the case,
are you sure the '2nd neutral' is not in fact an earth but wrongly sleeved with a piece of black instead of green/yellow?
Rank: Project Manager
Posts: 2166
Joined: Wed Mar 21, 2007 8:33 pm
Location: The fifth continent.

Postby ericmark » Wed Nov 30, 2011 3:12 am

To assume is dangerous one needs as always to test. To test if a wire is neutral or earth normally one needs to switch off the main isolator. I have in the past had a problem in where colours are not to be trusted working out what is neutral and what is earth.

Many fans have two lines and as a result it needs more than two core and earth so it is possible that the colours are wrong. So question is how do you know it's a neutral wire?
Rank: Project Manager
Posts: 2458
Joined: Fri Oct 02, 2009 8:49 pm
Location: Llanfair Caereinion, Mid Wales.

Display posts from previous
Sort by
Order by

  • DIY How to Project Guides
  • DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!

  • Related Topics