Here are common uses for wire colors: Blue or Black – C – Common wire, may be unused by your existing thermostat. Enables continuous power flow from the Red wire. Red – R – 24VAC power from the furnaces transformer.
Also Know, how do I wire a 2 wire thermostat? Most two-wire thermostats wire have a red and white wire encased in a brown insulated coating. Strip the red and white wires back about 1/4 inch at both the thermostat and the furnace ends. Connect the white wire to the W terminal on the furnace and thermostat.
Moreover, what is the white wire on a thermostat for?
Here is the industry standard thermostat wire color code used for most systems: White. The white wire connects to your heat.
Is RC the same as C wire?
Though it is a common notion, it may be incorrect to state that the C-wire powers the thermostat. Typically, the wires that give the power supply (usually termed as the hot wires) are marked Rc (for cooling) and Rh (for heating). They give a 24-volt power supply from the HVAC systems control panel.
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