Discuss Lighting problem. One switch wont work without the other being on in the UK Electrical Forum area at ElectriciansForums.net

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Just replaced my double light switch now one switch wont work unles the other is on. I have the main power going in to the com then a wire leading from that into the other com then both circuits going in to the 2 L1 holes. I will try and get a picture up
 
Picture of setup

Screenshot_20180225-141925.png
 
One of those cables is live in you would need to find out which one it is first and that goes into the COMMON which links to the other.
 

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