15kw Electric Furnace Wiring Size. The exact amps an electric furnace requires is solely based on the size of the furnace and its performance capabilities. If the minimum ampacity is 55 or less per circuit 6awg NM cable will probably serve your needs as long as no correction or adjustments have to be made to the ampacity of the conductors.
If you choose to utilize aluminum SE or SER cable be aware of 33810B4a. By multiplying the volts by amps you will receive total wattage. I am replacing a propane furnace with a Rheem Air Handler and 15kw heater kit.
The ground can be 10 if you are not using a cable.
If you choose to utilize aluminum SE or SER cable be aware of 33810B4a. You can find the 15kW strip designed for MrCool Signature Series here. The exact amps an electric furnace requires is solely based on the size of the furnace and its performance capabilities. Can I use 2 40 amp breakers with 6 wire instead of one 80 amp on a 4 wire.
