Recent Feedback
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
Experience: 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