electrical - Can someone tell me what/how there are 4 wires on one switch and if they're necessary? - Home Improvement Stack Exchange
Best way to automate a 4 gang Light Switch? (UK) : r/homeautomation
Best way to automate a 4 gang Light Switch? (UK) : r/homeautomation
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Replacing a Light Switch with 4 Wires - RedFlagDeals.com Forums
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![Light switch wiring [UK] - Home Improvement Stack Exchange](https://i.stack.imgur.com/65mZp.jpg "Light switch wiring [UK] - Home Improvement Stack Exchange")
Light switch wiring [UK] - Home Improvement Stack Exchange
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