The following three phase motors are the same except the horsepower: Motor one 20 hp, motor two 30 hp, motor three 40 hp. Type: squirrel cage: Voltage 440 volts 3 phase. Current name plate is XXX N.E.C. current Duty: Continuous, Start: Auto trans. What is the size of over current protection needed for this circuit ?

The following three phase motors are the same except the horsepower: Motor one 20 hp, motor two 30 hp, motor three 40 hp. Type: squirrel cage: Voltage 440 volts 3 phase. Current name plate is XXX N.E.C. current Duty: Continuous, Start: Auto trans. What is the size of over current protection needed for this circuit ?