MOTORS. MOTOR CIRCUITS. ANDC Table 430.250 Full-Load Current, Three-Phase Alternating-Current Motors

Branch-circuit conductors supplying a single motor shall have an ampacity not less than 125 percent ot the motor full-load current rating. Armature current varies inversely as applied voltage.

Wide variations from these figures can arise, especially on single phase motors, and engineers should, whenever possible, determine the actual full load current from the motor rating plate.

2 The information in this chart was derived from Table 50.1 of UL standard 50. A. The voltages listed are rated motor voltag. s. The currents listed shall be permitted for system voltage ranges of 110-120, …

We are looking for the smallest heater/overload size allowed for motor #2 on motor diagram #1. Overloads = name plate full load current times either 115% or 125% depending on S.F. and/or Temp …

Full Load Current Three-Phase Alternating-Current Motors The following values of full-load currents are typical for motors running at speeds usual for belted motors and motors with normal torque …

FULL LOAD CURRENTS Single phase dry-type transformers ... Note: Rated line Amps @ 60 Hz For other kVA ratings or voltages: