By Brian McDivitt, PE

According to the National Electrical Code, a branch circuit refers to “the circuit conductors between the final overcurrent device protecting the circuit and the outlet(s).” A branch circuit is the last step of building power distribution before you plug in a device or appliance.

But how do you determine and understand what voltage is available for your appliance? This article is the first in a three-part series about power distribution that helps you understand the basics of circuit voltages, distribution configurations, and configuration preferences.

Editor’s Note: This is the first in a three-part series on power distribution systems. Read part two and part three.