Replace 240v Circuit Breaker

A 120 volt circuit has only one hot wire connected to the breaker plus a neutral wire connected to the neutral bus bar in the service panel.

Replace 240v circuit breaker.

Remove the screws holding the circuit panel s face plate then loosen the screws holding the wires on the defective breaker. A circuit breaker panel is essentially a big switch made up of smaller switches that correspond to certain electrical zones in a building. For safety the worker first shuts off the main circuit breaker and tests for voltage before touching any wires or wire connections. A 15 amp breaker requires at least number 14 gauge wire while a 20 amp breaker requires at least number 12 gauge wire.

Use a 4 strand cable of a gauge designed to operate with the power rating of your breaker. Circuit breakers can simply be reset. Should one of the switches fail an electrician can replace it for approximately 120 200 depending on the region. Replacing a circuit breaker appears somewhat intimidating.

Run the cabling from your 240v circuit to the location of your breaker box. To change a circuit breaker find the main circuit breaker box and locate the defective breaker by looking for a tripped breaker. A 3 wire 240 volt circuit has two hot wires each supplying 120 volts for a total of 240 and an equipment ground wire.