08/13/2026
Before adding appliances or electrical devices to an outlet in your home, do a little math to make sure you’re not overloading a single circuit. Devices that draw a lot of power, like window AC units or space heaters, typically tell you in the installation instructions how much power they use. And while plugging one of those things into a circuit might work, plugging in more than one on the same circuit, could cause problems.
Look for how many watts each device uses and add them together. If the devices together add up to over 1,500 watts, and one circuit can only handle 1,440 watts, you should avoid plugging them in on the same circuit.