![]() So be sure to use the wiring and circuit breakers appropriate for the system, especially if you are a DIYer. But this also means that it will require more electrical power. The more BTUs or tons, the more cooling power the air conditioner has. Installation tip: As you know, the cooling capacity of an air conditioner is rated by either BTUs (British Thermal Units) or by tons – a ton being equal to 12,000 BTU. But a lot of it has to come straight from the wiring. Some of that power is supplied by the battery-like capacitor. This is about 4 to 5 times that of an electric hair dryer. When most central air conditioners first start up, they may require up to 5,000 watts of electricity. These systems are large users of electricity. Central Air Conditioner Power and Wire RequirementsĪ central air conditioning system requires a 220-volt circuit of its own. A signal from the thermostat is sent through these wires to call for the AC system to turn on and off. An additional set of low voltage wires from the AC condenser to the control board on the home’s furnace will also be needed. Info tip: Common central air conditioner wire size options are discussed below.ĥ. Electrical wire, commonly called Romex, of the correct size for the AC system and long enough to run from the power panel to the location where the condenser will be located. ![]() Check your AC’s installation manual or talk with an electrician to determine the right breaker at the right amps.Ģ. Supplies tips: Not every circuit breaker will fit in every breaker box. A “double pole” circuit breaker (220v) of the appropriate brand for the breaker box and the correct amperage for the central AC system. Starting at the main power panel, you will need the following electrical supplies:ġ.
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