Wiring on a double switch???

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12 Jan 2013
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Glasgow
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Hi there, I was wondering if anyone was able to offer any advice on my problem. I have just moved into a new house and there was 2 recessed spotlights in the hallway which didn't work. There was a double switch on the wall which I assume is to contol these spots however I would have guessed that one switch would control both, so I am unsure as to what the other switch is for. I took the spots out and realised that that they were low voltage although I couldn't see a transformer. I replaced the spots with mains voltage spots and also replaced the double switch re-wiring exactly as I found it. The switch has 3 sets of wires going into it each consisting of a red live, black neutral and an earth. 1 live goes to the common on one side with a bridging red wire to the other common, the other 2 live go to L2 on each side, the 3 black neutral are linked together with a juntion box 2 on one side and 1 on the other and all the earth are earthed to the light box. I am waiting on a friend coming with a multimeter coming round to see if there is a current running through it. Until such time has anyone got any ideas, any help would be much appreciated. I have taken pictures however have been unable to upload due to my tempremental laptop. Thanks, Brian
 
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It would appear to be wired logically.
It's impossible to say from here what the switches operate.

There may be a transformer in the light fitting.
If there is obviously wont work with 240V lamp.

You definitely need your friend and his meter.
 
Normally a two gang switch in the hall would suggest lighting for hall and landing(assuming you have a landing) But not always the case. Do you have any outside lighting or if a bungalow a loft space with hatch above?
As far as the hall lights are concerned I would suggest a little more investigation, you should not be putting 240V lamps on to 12V transformers, if you had 12V lamps in original, I would assume that you have transformer(s) within the ceiling void and they have either packed up or a connection has become loose.
 
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