Why is voltage specification important on a motor's nameplate?

The voltage specification on a motor's nameplate is crucial because it specifies the electrical supply compatibility. This means that the motor is designed to operate efficiently and safely at a specific voltage level. If the motor is connected to a supply voltage that is too high or too low, it can lead to inefficient operation, overheating, or permanent damage to the motor. Ensuring the correct voltage is supplied is essential for the motor to function properly and is key to maintaining its performance standards.

The other options do not accurately reflect the primary importance of voltage specifications. The physical size of the motor is generally determined by its power rating and design rather than the voltage. Warranty periods do not have a direct relationship with voltage specifications, as warranties typically cover performance rather than compliance with electrical characteristics. Furthermore, the color coding of motors usually corresponds to other factors, such as phase or purpose, rather than the motor's voltage rating.