What does 120 277VAC mean?

Answer 1

120/277VAC refers to a type of electrical power supply commonly used in commercial and industrial settings. It indicates a dual voltage system where 120 volts is typically used for standard lighting and receptacles, while 277 volts is often used for larger lighting fixtures, such as fluorescent or LED lights. The "VAC" stands for "Volts Alternating Current," signifying that the voltage is alternating rather than direct current (DC). This configuration allows for efficient lighting solutions in buildings, utilizing both voltage levels effectively.