Ac Circuit Breaker Wiring
In most panels the main breaker is a large 240 volt circuit breaker that is located at the top of the panel.
Ac circuit breaker wiring. Wiring for a 20 amp 240 volt appliance circuit breaker this circuit breaker wiring diagram illustrates installing a 20 amp circuit breaker for a 240 volt circuit. Wiring a 2 pole circuit breaker for an air conditioning system requires working inside the service panel where the main panel lugs will still be electrified even with the main service disconnect. In other words the breaker is designed to cease power to an overloaded circuit. For a new ac installation a cable must be installed from the disconnect to reach up to the main electric panel.
A hole must be drilled through the wall to bring the cable inside. With the breaker turned off the wires can be disconnected and the cable removed from the electrical compartment of the ac unit. It will control all the power entering the home and connects to both hot buss bars running down vertically through the panel. The 12 2 gauge cable for this circuit includes 2 conductors and 1 ground.
A continuous circuit consists of a hot wire a neutral wire and a ground. Wiring an a c unit involves installing a double pole 240 volt circuit breaker in the main service panel running a 240 volt cable to the a c s location installing a safety disconnect switch there and then running weatherproof flex from the switch to the a c s terminal box.