What is a common cause of failure in single-phase motors?

Lack of adequate ventilation is indeed a common cause of failure in single-phase motors. Adequate ventilation is essential for dissipating the heat generated during motor operation. When a motor lacks proper ventilation, the temperature rises beyond safe operating limits. This overheating can lead to insulation breakdown, premature wear of internal components, and ultimately, motor failure.

Inadequate airflow can be a result of various factors such as blockages around the motor, incorrect installation in an enclosed area, or a malfunctioning cooling fan. Ensuring that motors are properly ventilated helps maintain optimal operating temperatures, thereby extending the lifespan of the motor and improving its efficiency.