ceiling wiring

Postby Chris S » Wed Apr 25, 2012 8:22 pm

just looking at the wiring in our new house. The bathroom light fitting wiring currently features 2 lives tied together as well as 2 earths tied together. Neither combination is used with the actual light fitting. Can sort of understand this tying together in a "1-way" sense but am intrigued why they used the 2 neutrals for hooking up to the light fitting?
Chris S
Rank: Labourer
Progress to next rank:
Posts: 4
Joined: Sun Sep 30, 2007 8:44 pm


Simply Build It

Postby Dave From Leeds » Fri Apr 27, 2012 12:37 am

Hi Chris,

I'm no electrician but, from what I know about lighting wiring, one of the "neutrals" that you describe will actually be what is known as a "switched live" coming from your switch. From the way that you have described the fitting wiring one of the two lives that are coupled together will be the incoming live and the other one will go to the switch. The incoming neutral will go straight to the light fitting. If you look at the switch, you should find that one side of it has a live wire and the other side will appear to have a "neutral" wire coming off it. It is this apparent neutral wire that is actually the "switched live" feed that then goes to the light fitting. In this way there only needs to be one two core cable between the switch and the fitting, with the incoming mains remaining at the fitting junction box.

I hope this makes sense to you.

Dave From Leeds
Rank: Ganger
Progress to next rank:
Posts: 179
Joined: Mon Nov 19, 2007 9:02 pm

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