![]() if the 50 amp breaker can’t handle the load for compressor start up I'll just install a 60 amp breaker. If you are in the market for a 50 amp wire, i would choose this 6-gauge wire. Before you take on any type of wiring job, be sure to know the exact size wire you need. Fifty-amp breakers are commonly used for electric ranges, sizeable electric water heaters, and commercial applications. Whether you have a 30 amp, 40 amp or a 50 amp breaker, wire size is essential. 50 AMP WIRE SIZE: A wire gauge of 6 is needed for a maximum of 50 amps. For longer runs, you can use a 4 AWG wire. ![]() I'll still probably go with #8 THW and use the existing 50 amp breaker for now since the cost difference is not much with a 10' length and I will feel better. The best wire for 50 amps is a 6 AWG wire. So #10 wire (35 ampacity) and 60 amp breaker (27 amp compressor current x 225% = 60.25) meets code. ![]() If that is not enough to handle the starting current of the motor-compressor, you can use the next larger protection device if it does not exceed 225 percent of the motor-compressor current rating. 10-gauge are used in electric clothes dryers, 240-volt window air conditioners, electric water heaters supporting 30 amps 6-gauge are used for cook tops and. Also, the protection device cannot exceed 175 percent of the equipment load current rating. One 50 amp outlet (or NEMA 14-50R), a wire (6 or six-gauge is highly recommended), and a weather-resistant box. If you are planning to plug your RV into a standard 15-amp or 20-amp outlet, you will get only this amount of power to use. The short-circuit and ground-fault protection device for motor-compressor conductors must be capable of carrying the starting current of the motor. 25-50 feet: 6 gauge 50-100 feet: 4 gauge Outlet types. Using thinner wires results in an electrical system that does not meet code requirements and can pose a serious safety hazard. I always thought #10 should be connected to maximum 30 amps as when wiring electric water heaters, Air compressors etc.Īfter talking to the pool pump installer and doing some research, I found that the rules are different for "electrically driven air-conditioning and refrigeration equipment that has a hermetic refrigerant motor-compressor", Now household appliances as room air-conditioners, household refrigerators and freezers, drinking water coolers, or beverage dispensing machines are not included in this rule.Īrticle 440, Air Conditioning and Refrigerating Equipment.ĭictated by the listed "Minimum Circuit Ampacity" This pool heat pump lists this as 35 amps, which #10 THW is spec’d for. A 6-gauge wire conductor is a minimum size required for a 50-amp circuit breaker, as stated in the American Wire Standard (AWS).
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