10 Gauge Wiring Furnace. The electrical inspector in my area Idaho says I need to run 4 gauge wire. I will be having an electric furnace installed which according to the HVAC guys requires two 60 amp breakers.
He also said I could run 6 gauge if run in conduit. When wiring a furnace you need to check the wiring instructions for the units and the incoming circuits. The best 10 gauge wire can be used to wire amplifiers for your audio system.
Meets CSA cold bend and impact tests at -40ºC.
Thermostat wire is usually 18 gauge wire versus 14 12 and 10 gauge wire for most circuits in a residence. Be sure to doublecheck the wiring diagram of your furnace as some models use the sequencer differently. Wire gauge refers the physical size of the wire rated with a numerical designation that runs opposite to the diameter of the conductorsin other words the smaller the wire gauge number the larger the wire diameter. When it comes to 120-volt circuits the most common range wire sizes are 14 and 12 AWG.