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What does l1 l2 and COM mean on a light switch?

A one way light switch has two terminals which is a common marked as COM or C. The common is for the live wire that supplies the input voltage to the switch. The single direction plane switch has two L1 terminals, the terminal to which the neutral cable is connected - the blue cable (traditional black, before changing). COM or Common is the terminal to which the live core cable is connected - this is the brown cable (red era).

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