The goal of an effective motor overload protection scheme is to protect the motor from damage while allowing it to operate normally up to its thermal limit. Ideally such a scheme would be based on a ...

Art. 430, Part III provides the requirements for motor and branch-circuit overload protection. Because of inrush current, overload protection is separate from overcurrent and ground fault protection ...

Note: This article is based on the 2011 NEC. Article 430 provides the requirements for electric motors while Art. 440 offers amended and additional requirements for hermetic motors, such as those used ...