Voltage, Nominal definition
Voltage, Nominal means voltage by which an installation (or part of an installation) is designated. The following ranges of nominal voltage (r.m.s. values for a.c.) are defined:
Voltage, Nominal means a nominal value assigned to a circuit or system for the purpose of conveniently designating its voltage class (as 120/240 volts, 480Y/277 volts, 600 volts). The actual voltage at which a circuit operates can vary from the nominal within a range that permits satisfactory operation of equipment.
Voltage, Nominal means the voltage by which an installation or part of an installation is designated in accordance with the following ranges of nominal voltage: