FURNACE THERMOSTAT WIRING COLOR CODE STANDARD

Thermostat Wiring Colors Code [HVAC Wire Color Details]
Thermostat Wiring and Wire Color Chart – Thermostat Wiring Colors Code; Tstat Terminal Designation: Color of Wire and Termination: R – The R terminal is the power. This is a red wire and comes from the transformer usually located in the air handler for split systems but you may find the transformer in the condensing unit.How to Wire a Thermostat · Single Transformer
Thermostat signals and wiring - xtronics
23 rowsWhile there isn't an official standard for thermostat circuit wiring colors, there is a TERMINALPROBABLE WIRE COSIGNALDESCRIPTIONCBlue24 Vac CommonFrom one side of the 24Vac transforR or VRed24 Vac Power to be sFrom other side of the 24Vac transfRh or 4Red24 Vac Heat call switcSame as R, but dedicated to the HeRcRed24 Vac Cooling call swSame as R, but dedicated to the coSee all 23 rows on xtronics