All motor circuits require ___ protection.

All motor circuits require comprehensive protection to ensure safe and reliable operation. Overload protection is essential to prevent overheating due to excessive current draw, which can occur if the motor is stalled or operates under conditions beyond its rated capacity. Short-circuit protection is critical for safeguarding the circuit against sudden surges of current caused by faults that could lead to severe equipment damage or fires. Ground-fault protection is necessary to detect and interrupt leakage currents that may occur if there's an insulation failure, helping to protect both personnel and equipment.

Since each type of protection addresses specific risks associated with motor circuits, it is imperative that all three protective measures—overload, short-circuit, and ground-fault—are implemented. This approach ensures a comprehensive safety strategy, minimizing the potential for electrical hazards and extending the lifespan of motor equipment. Hence, all these protections together are required for the safe operation of motor circuits.