Written by Nominal Voltage is a nominal value assigned to a circuit or system for the purpose of conveniently designating its voltage class (e.g., 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.
FPN: See ANSI C84.1-2006, Voltage Ratings for Electric Power Systems and Equipment (60 Hz).
