For those asking about wiring size/gauge, according to the specs the load on the single phase model is 17 amps @ 230 volts. Different ways of figuring this but most residential electrical services are 120/240V. If you take 17A x 230V = 3,910 watts. Voltage goes up / amperage goes down so 3,910 watts divided by 240V = 16.3 amps. They are including in-rush of the motor at startup to achieve the 17A they claim. In-rush is short lived but can strain a motor a bit if being used on a heavily loaded circuit. Specs state 3hp / 2.2 kW, 2.2kW = 2.2 x 1,000 = 2,200 watts. 2,200 watts divided by 240V = 9.2 amps. 9.2A would be the assumed "full run load" for the compressor motor. In a residential setting, this unit would likely work just fine on 15A, 2-pole breaker with 14 gauge wire as long as the circuit is not heavily loaded. 20A, 2-pole breaker and 12 gauge wire will have no issues at all. A little extra information for those who might need it in the future, almost all standard distribution breakers, both commercially and residentially under 200A are designed to trip the breaker once they exceed 80% load of the stated breaker size, regardless of poles (1, 2 or 3). 20A breaker will trip if continuous load exceeds 16A (this does not count in-rush at startup for motors), 15A breaker will trip if continuous load exceeds 12A, 30A breaker will trip if continuous load exceeds 24A, so on and so forth. All that being said, if you're worried about your wiring, bump up one size in wire. Regarding the OP's original comment about the wire running deep into the motor, if it's factory wiring, I would leave it be as it was designed and built utilizing components and sizing they know to work as they want it to. Also, typically, internal motor wiring or cord wiring is totally different in spec than your standard household wiring. Hope this helps. Sorry it's so long!
