What occurs if the current exceeds the full-load current?

When the current exceeds the full-load current, the motor windings overheat. This overheating occurs because excessive current generates increased heat due to the resistance in the motor's windings. As the temperature rises, it can lead to insulation failure, reduced efficiency, and potentially permanent damage to the motor.

Overheating not only causes increased wear on the motor's components but can also trigger thermal protection that may shut down the motor to prevent further damage. Therefore, maintaining operation within the full-load current is essential for the longevity and reliability of the motor, as overheating can severely impede its performance and lead to costly repairs.

The other options suggest outcomes that do not align with the reality of electrical operations in motors when subjected to excessive current. Therefore, understanding the implications of operating beyond the rated current is crucial for effective motor management and protection strategies.