What does VAC mean in AIRCRAFT & AVIATION

Explanation

VAC stands for volatge alternating current, which measures the electric potential difference between two points in an AC circuit. VAC quantifies electricity because it determines how much power can be passed through any given point in a circuit. The magnitude of this measure is determined by multiplying the root mean square (RMS) voltage by √2. The higher the VAC, the more power that can be transmitted across a circuit - meaning more objects or processes can be powered by one single source of electricity. It's important to remember that VAC only applies to alternating current - direct currents differ from AC's and have their own measurement, called volts DC (abbreviated as "VDC"). Although confusing at first, it's easy to remember which one you need depending on what type of electrical work you're doing: if it uses AC, you'll use VAC; if it uses DC, you'll use VDC instead.