A heat pump nameplate specs minimum circuit ampacity 36.8 and max hacr breaker at 60. Is 10AWG correct and what size breaker should be installed at panel? Also, should a fused disconnect be installed near appliance and if so, what size fuses?
All work must be permitted and inspected. WE KEEP GOING UNTIL YOU HAVE THE INFORMATION YOU NEED. I must come and go. This is step One.HelloThe NEC rates #10 wire at 30 amps or less peak its too small for the load Use #8 AWG copper wire, and a 50 amp breaker if the run is under 50 feet. and its 240 volts single phase You need a disconnect switch within sight of the unit, it can be fused or not since there is a breaker installed at the panel in virtually all building code jurisdictions. if you want a bit of extra protection for the heat pump, use 40 amp *dual element* fuses in a fused disconnect. Those will take the heavy start surge without blowing and provide good protection. The unit will generally run at 32 amps or a lot less.http://www.mjobee.com/projects&news/NEC%20Art%20310.15.pdfLet me know if this does it for you or not, we keep going until all of your questions are answered.Phil
Retired electrical contractor, 51 years experience.
listed voltage is 208/230 single phase. Does this change anything? Is a transformer required? thanks for your help.
Hello again, that doesn't change anything. by the way you need to run a #10 awg copper *ground wire wire as well. *ground doesn't need to be #8, just the conductors.Phil