Replace 240v Circuit 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.

Replace 240v circuit breaker.

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. Circuit breakers can simply be reset. Replacing a circuit breaker appears somewhat intimidating.

This is the basic process electricians follow to replace a 120 volt or 240 volt circuit breaker in a household electrical system. Run the cabling from your 240v circuit to the location of your breaker box. Use a 4 strand cable of a gauge designed to operate with the power rating of your breaker. To change a circuit breaker find the main circuit breaker box and locate the defective breaker by looking for a tripped breaker.

Remove the screws holding the circuit panel s face plate then loosen the screws holding the wires on the defective breaker. Should one of the switches fail an electrician can replace it for approximately 120 200 depending on the region. 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.