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lighting - Light switch with one red and two black wires. Dont think it's a three way - Home Improvement Stack Exchange
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home wiring help - replacing light switch with 4 wires (2 red/2 black) | Electricians Forums | Electrical Safety Advice | Talk Electrician Forum
HELP PLEASE - Assistance wiring a Leviton DZS15 Switch - Devices & Integrations - SmartThings Community
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