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Discuss Switch wiring in the UK Electrical Forum area at ElectriciansForums.net
Did it ever work correctly? If so, did anything change or was any work done that caused the problem? Superficially the wiring looks OK, although we can't see which cables each of the wires in the triple switch comes from.
Note that the three downstairs switches seem to share a single permanent feed, and the strappers are what looks like twin-red & earth with one red core from the upstairs switch going to the light, so there is a significant chance you have a 'borrowed neutral' configuration. This doesn't affect how the switching works, but it does mean there is a risk of shock when working on the wiring unless both upstairs and downstairs circuits are isolated.
I think you are spot on there you can just make out some of the markings.I would say the wiring is wrong because the 3G switch appears to have inverted terminal sets....
L1 L2 COM L1 L2
COM L1 L2 COM
But appears to be wired as though the switches are all laid out in the same direction.
Your assumptions were correct yes.Were we correct about the switch connections.
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