Fitting new ceiling rose

crnflke

We are having a small problem, trying to replace a ceiling rose on our landing. Currently none of the upstairs lights work, we also have a light fitting in the loft, which has the wiring coming down into this ceiling rose!?!

We're not sure which wires go where into the new light fitting, and we've blown a few fuses trying to figure it all out! I have taken a couple of pictures, but I'm not sure how to post them on here!

Please help!

HugoSP

I don't mean to be unkind but I would suggest you get an electrician in for this one.

However, if you do want to have a go yourself....

I suspect you have got the wires mixed up whilst rewiring. Essentially you usually have 3 sets of wires coming into a ceiling rose, or a junction box wired to the rose. Sometimes you have 4 and sometimes you have 2. If you have only 1 set of wires it probably means that the rose is wired straight to a juction box.

In a standard installation you will have the incoming and outgoing live and neutrals. The live is always live and these form your lighting circuit. From what you say in your post I suspect the outgoing live and neutral go to your loft light.

In addition, there will be another live, which will go down to your light switch. The neutral from the same cable will actually be your switched live. The live or brown wire on your celing rose will need to be connected to this. The blue wire or neutral on your ceiling rose will be connected to the other neutrals (the neutrals that form your main lighting circuit).

Assuming you have 3 sets of wires.....

To determine which is which, you will need to establish which red (live) wire is pemenantly live. Then you will have identified the incoming lighting main.

Then you need to try to establish which set of wires work off the switch. You can do this via a continuity test using a multi meter or similar.

The remaining set of wires will be the outgoing lighting main, ie the one onto your next ceiling rose/fitting - probably the one in your loft.

Alternitively buy or borrow a copy of Collins DIY Manual. It has it all in there.

baldelectrician

http://www.diynot.com/forums/viewtopic.php?t=7553&postdays=0&postorder=asc&start=0
http://www.ultimatehandyman.co.uk/lighting_circuits.htm

hope this helps

(if i told you I would have to shoot you )
but I can post a few links