I have just changed a 2 gang dimmer switch.I thought i copied the original correctly.I have looped the commons,put 2 reds into L1, on both switches, but no joy.Please can anyone help. Thanks
you say you have looped the 2 commons, this is correct, but what about the live feed you havent mentioned it (it should be going to one of the common termianls)
There was a 2 gang dimmer switch there originally. On both switch's there are two sets of cables going to them. The common only has a looped wire (red) going between the two switch's. There are two reds going into both l1, one must be a switched live. The neutrals from the two sets of cables have been joined together. Hope this is enough info. Thanks for your time.[/img]
If you are sure that you have 2 supply cables, with L&N, and two load cables with L&N, use your multimeter to identify the permanent lives - these go into the COMs, the other reds into the L1s, the neutrals into choc-block and the earths into the earth terminal on the back box. If the dimmer has a metal face plate put the earths there and run a flylead to the back box.
if you've got two permanent lives you don't need to link the COMs
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