I need to pull new wire from my furnace to my thermostat and was wondering if there would be any problems in using an Ethernet cable instead of standard thermostat wiring.
The reason being is I have left over cat6 cable and figured the wire should suffice in place of spending cash on a 4-wire thermostat cable.
fwiw: the run will be approximately 50'.
If the cat6 wiring will suffice, should I use both twisted wires as one? Or just a single wire from each twisted pair? i.e.,
Orange/OrangeWhite to 1 hvac connection
or
Orange to 1 hvac connection
Best Answer
Ethernet cable should work fine since thermostats use low voltage and low current. For simplicity, it's probably easier to use each pair as if it were a single wire. That makes is easier to remember what is what at each end and clearer to anyone looking at it years later.