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electrical - Replacing switch with dimmer switch - 2 red wires and 1 yellow wire - Home Improvement Stack Exchange
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Why is my light switch wire like this with the extra red wire, and why are there more white wires in the wall not going to the switch : r/askanelectrician
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wiring - Converting switched outlet with 2 black and 1 red for a smart switch - Home Improvement Stack Exchange
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