Switch With 4 Wires

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electrical - Why does my one-way switch have 4 wires? - Home

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electrical - Changing toggle switch (4 wires) to Caseta dimmer switch

electrical - What's the proper way to replace a wall switch with two

switches - How do I wire this 3 way switch? - Electrical Engineering

electrical - Why does my one-way switch have 4 wires? - Home