Name a common cause of motor failure due to electrical problems.

Overheating due to overload conditions or poor ventilation is a common cause of motor failure related to electrical problems because it directly affects the motor's thermal limits. Motors are designed to operate within a certain temperature range, and exceeding this range can lead to insulation breakdown, reduced efficiency, and in severe cases, burnout. When a motor is overloaded, it draws more current than it is rated for, which increases the heat generated in the windings. Similarly, if adequate ventilation is not provided, the motor’s ability to dissipate heat is compromised, leading to higher operational temperatures. Continuous exposure to these conditions can result in premature failure of the motor components, including the winding insulation.

In contrast, while short circuiting of wiring connections can indeed lead to electrical failures, it is less common than overheating when considering the operational conditions motors face. Incorrect specifications can cause operational inefficiencies but do not directly lead to immediate electrical failure in the same way overheating can. Furthermore, bearing failure due to lack of lubrication is a mechanical issue rather than an electrical one.