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What's the purpose of this looped black wire on my single pole switch? Trying to install a in wall timer switch that requires 3 wires : r/askanelectrician
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How to replace an old (1980s) light switch that has 2 black wires and one red wire (plus ground) - Quora
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electrical - Replacing a light switch that has 2 red wires and 1 black- one red was on the screw the other red was back stabbing the same portion - Home Improvement Stack Exchange
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