Once a fault is detected, the circuit breaker contacts must open to interrupt the circuit; this is commonly done using mechanically stored energy contained within the breaker, such as a spring or compressed air to separate the contacts.
A circuit breaker is defined as a switching device that can be operated manually or automatically for controlling and protecting an electrical power system. It consists of two main contacts: a fixed contact and a moving contact.
Ask This Old House electrician Scott Caron provides a deep dive into how fuses and circuit breakers protect a home.
The circuit breaker is an essential device in the modern world and one of the most important safety mechanisms in your home. Whenever electrical wiring in a building has too much current flowing through it, these simple machines cut the power until somebody can fix the problem.
Examine your circuit breaker panel to determine if it has the amperage capacity and space required for a new 240-volt circuit or appliance.