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Wiring a new ceiling light

Posted: Thu 17 Jun, 2010 21.36
by Lee
Hello.

So anyway we've got one of these newfangled ceiling lights in Seaman HQ to replace the old candle system we had set up. Mr Scott suggested posting pics on here, so here goes...

Image

Image

People on other forums have suggested connecting the two reds together in a block connector and tuck them away. Switch live to L, neutral to neutral, earth to earth. Done this, but it's not working.

Any ideas?

Re: Wiring a new ceiling light

Posted: Thu 17 Jun, 2010 22.34
by bilky asko
http://forums.moneysavingexpert.com/sho ... ostcount=3

This may be of some use.

Also, if you have a dimmer switch, try replacing it with a straight on/off switch, as dimmers can cause problems with fittings.

Re: Wiring a new ceiling light

Posted: Thu 17 Jun, 2010 22.54
by Philip Cobbold
As there are 2 sets of live and 2 sets of neutral I assume you have a second light in the room that works off the same switch?

Re: Wiring a new ceiling light

Posted: Fri 18 Jun, 2010 00.12
by Gavin Scott
Yup, its a dual circuit. Obviously for a fitting with two sets of lamps.

Are there two switches on the wall? If not, someone has simplified the circuit over time.

The advice you've been given is poor. Twist both reds (Live) together and both blacks (Neutral) together. Put the twisted pairs into the Live and Neutral inlets respectively, and the yellow/green (Earth).

That should do it.

Let me know if not.

Re: Wiring a new ceiling light

Posted: Fri 18 Jun, 2010 00.23
by all new Phil
Yeah, just... umm... make sure you stand back before you flick the switch.

Re: Wiring a new ceiling light

Posted: Fri 18 Jun, 2010 00.37
by Lee
As far as I know, the black one is neutral and the black with the red sleeve is the "switch live". Are you sure I twist them together?

There's only one light in that room, one switch. As far as I know there's never been two.

Re: Wiring a new ceiling light

Posted: Fri 18 Jun, 2010 09.35
by Gavin Scott
Lee wrote:As far as I know, the black one is neutral and the black with the red sleeve is the "switch live". Are you sure I twist them together?

There's only one light in that room, one switch. As far as I know there's never been two.
Ok, will have another go at posting with a sober head. Clearly thought it was a good idea to post after the pub.

BAD IDEA.

Anyway - "switch live" is a confusing term. Its not the live. The red (and only the red) is live.

You only need to create one circuit.

Current in (red) to the (L) on the fitting
current out (black) to the (N) on the fitting.

One circuit. Simple path.

I would (despite anything I may have written at 1.20am) connect the remaining red and black to separate blocks of a cable connector strip, wrap in pvc tape for good measure, and tuck into the void.

Don't forget the earth - and make sure you're wiring the red/black/earth from the same feeder - which appears to be the one including the red sleeve (on the left of your pic).

Re: Wiring a new ceiling light

Posted: Fri 18 Jun, 2010 10.10
by Gavin Scott
I'll tell you why I was confused yesterday - its common to combine two light circuits into one switch - so at the switch plate you would twist red/red and black/black - it threw me that this was at the ceiling.

Out of curiosity I would undo the wall switch plate. If there's two sets of cables twisted together then there must indeed have been two circuits.

Re: Wiring a new ceiling light

Posted: Fri 18 Jun, 2010 12.26
by Lee
Have just tried what you said and still nothing :(

Re: Wiring a new ceiling light

Posted: Fri 18 Jun, 2010 12.37
by Lee
This is what's behind the switch...

Image

Re: Wiring a new ceiling light

Posted: Fri 18 Jun, 2010 13.23
by Gavin Scott
I see. Perhaps the circuit you connected isn't active. Try the other. Do you have a mains tester screwdriver? About 1.99 from a hardware shop.