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Thermostat Wire Color Codes You Need to Know | AireServ
Thermostat Wire - 18 Ga or 20 Ga - 4 or 5 Conductor - Line & Low Voltage Thermostats, Relays & Transformers, Industrial/Commercial Space Thermostats, Plug In Inline Thermostats, Thermostat Wire
C-Wire Smart T-Stat - Can I connect it to this “Z” terminal? : r/hvacadvice