Thursday, July 9, 2015
Overcurrent protects the wire, overload protects the motor.
Over load and over current protection is simple....and sometimes not. For me it is easy to think of it this way. The overload protects the motor, the overcurrent protects the wire. Because the time/current curves are very far apart from each other, don't ever think that one will adequately protect for the other.
Many electricians size the wire from the starter to the motor based on the ampacity of the overload protec ...