Hi,
I'm wiring a new geothermal heat pump system. It requires a minimum of 2 supply circuits. One for the compressor, fan and electronics and another for 4 heater strips.
My question is related to the wire size required for the 19.2KW heater strips. All 4 strips consume a total of 19.2KW @ 230v. The MCA for the heater strip supply circuit is 110amps. The max breaker is 100 amps.
The NEC table 310-16 lists #1AWG wire for 110amps in the 60 degree column and #2AWG wire in the 75 degree column. While I believe the system connections are rated for 75 degree, I don’t see it posted.
Per code, What is the correct wire size for this setup. Are all heat pump/furnace systems rated for 75 degree terminations?
Thanks in advance for all responses!
Chris
