For example, if there are three 15-amp motors in the circuit, the ampacity Have wire in which the ampacity rating of the wire must be at least 125% of the full-load current of the largest motor, plus the sum of full-load currents for the rest of the motors. Branch circuits that contain two or more motors must It is required by the NEC for circuits supplying single motors to have an ampacity rating of greater than or equal to 125% of the full-load ampacity rating of the motor. Note: For synchronous-type motors with 0.9 and 0.8 power factor, there amperes listed in the table should be multiplied by a factor ofġ.1 and 1.25, respectively. Synchronous-Type Unity Power Factor (Amperes) Full-Load Amps: Three-PhaseĪlternating-Current Motors Source: NFPA 70, National Electrical Code, Table 430.250 Induction-Type Squirrel Cage and Wound Rotor (Amperes) Such as wire, tools, extension cords, and accessories. Search Amazon for your Electrical products This includes induction-typeĪnd synchronous-type three-phase alternating-current motors. The voltages listed below are standard rated motor voltages.

10 hp 3 phase motor amps