2 gang switch

I'm trying to replace an old 2-gang switch (operates 2 independent lights) with a new dimmer switch. Got meself in a bit of a tangle! Having removed it I can't remember now how the old switch was wired (so no lights in the room for Christmas - dumb or what?). There are two sets of red and black wires plus an earth-wire to the switch backplate. The new dimmer switch has 2 sets of connector blocks with an L1, L2 and Common on each. I think (slight exaggeration my wife says!) that one red and black pair went to an L1 and L2 terminal, while the other pair went to a Common and either L1 or L2 terminal originally. Unfortunately, I can't recall which wire went to which terminal though (although I know which red and black pair are which). I'd be very grateful for any advice on how to wire this up. Thanks

if its 2 cables and 4 wires.. then it should be Red from one cable to com and the corresponding black to L1 and the same on the other dimmer..

and Connect the earth..

if you connect both to L1 and L2 nothing will happen..

David

Have you got a two way switch on either of these lights or is it just 2 x 1 way circuits ???

dw3101 said:

if its 2 cables and 4 wires.. then it should be Red from one cable to com and the corresponding black to L1 and the same on the other dimmer..

and Connect the earth..

if you connect both to L1 and L2 nothing will happen..

David

Click to expand...

OK - thanks David, I'll give it a try and let you know What happens

Stephen The Sparky said:

Have you got a two way switch on either of these lights or is it just 2 x 1 way circuits ???

Click to expand...

Hi Stephen, I've got a single twin-switch unit (if that makes sense) - one switch for each of two lights in the same room - i.e. I guess that's 2 x 1 way circuits?.

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SORTED!!

Hi gents - taking advantage of a bit of daylight, I've connected the new switch today as you suggested - red to com, black to L1 for each of the 2 x dimmer buttons on the switch. Both lights are working perfectly now.

Thanks again for your prompt help - greatly appreciated. All the best. Tony.G

You should be able to connect up as follows

The red cable will be a feed so that can go to Common

The black cable will be a switched live up to the light so that can be connected to L1

And exactly the same for the other dimmer

Let me know how you get on ???

Neither light can be operated from a seperate swtch at another location can it?? Think steve is my wavelength that one of the pairs may be a strapper.

Or it could simply be as said in post directly above(hopefully!).

SORTED!!

Hi gents - taking advantage of a bit of daylight, I've connected the new switch today as you suggested - red to com, black to L1 for each of the 2 x dimmer buttons on the switch. Both lights are working perfectly now.

Thanks again for your prompt help - greatly appreciated. All the best. Tony.G