What is the requirement of NEC concerning branches and circuits servicing motors?

The requirement of the National Electrical Code (NEC) concerning branches and circuits servicing motors is that they must be sized according to the motor load. This is crucial for ensuring the proper functioning and safety of electrical systems involving motors. When circuits are appropriately sized for the load they will carry, it minimizes the risk of overheating and potential failure. Additionally, correctly sizing the circuit helps in preventing nuisance tripping of breakers, ensuring that the motor receives adequate current while operating under load conditions.

It is essential for circuit designers and electricians to consider factors such as the full-load current rating of the motor and any additional starting currents that may occur during motor startup when determining the appropriate wire gauge and circuit capacity. Proper sizing contributes significantly to the efficiency and reliability of motor operations in residential and commercial wiring applications.