What does the term "nominal" refer to in electrical voltage?

The term "nominal" in the context of electrical voltage refers to a standardized classification of equipment voltage. This classification is used to define a specific voltage level that equipment is designed to operate at under typical conditions. Nominal voltage serves as a reference point, allowing for consistent identification and comparison of different electrical systems and ensuring that devices are compatible within a given electrical framework.

For instance, when referring to a nominal voltage of 120 volts, it signifies the designed voltage level, which may actually fluctuate slightly due to load and other operating conditions. This concept is essential for manufacturers and users alike to ensure safety and functionality in electrical installations.