Volt Alternating Current (Vac)

A Vac is an alternating current (AC) with a voltage that reverses direction at regular intervals. The standard definition of a Vac is a sinusoidal wave with a amplitude of 1 volt and a frequency of 60 hertz. In the U.S., the frequency is typically 60 Hz, while in Europe it is 50 Hz. The term “Vac” is short for “voltage-amperes,” a unit of measure for electric power.