Circuit breakers snap into place onto one or both of the bus bars to provide power to the circuits. … Double-pole circuit breakers provide 240 volts to a circuit and snap into both hot bus bars. The electrical current leaves the service panel through the hot wires that are connected to the circuit breakers.

How does a home breaker box work?

What’s a breaker box? Electric panels take incoming electricity from your electric company and safely redistribute the electric current throughout your home through circuits. … Circuit breakers cut the power whenever electrical wiring in your home has too much electric current running through it.

What causes a breaker box to trip?

A circuit breaker will usually trip when there is an electrical fault that could cause damage to the circuit. This is usually an excess of current, a power surge or a faulty component.