The amperage that is needed by an air conditioner varies depending on the size of the machine being used. A smaller air conditioner generally requires less than 7.5 amps of electricity to operate, while a larger air conditioner requires more.
Smaller air conditioners can be plugged into any generic electrical socket that is cleared for between 15 to 20 amps, provided that it is not also being used by another major appliance. Larger air conditioners generally require its own dedicated circuit and electrical plug. The largest residential air conditioner models could require a special dedicated circuit with an increased level of voltage to power it.