Electricity is distributed at the main electrical panel to lights, receptacles, and appliances throughout the house via circuits. Each circuit is protected by a circuit breaker (or fuse) at the main panel that will automatically shut off the power to the circuit in the event of a dangerous electrical overload or short circuit. A circuit breaker can also be used manually to disconnect a circuit from incoming power so that you can repair or upgrade your receptacles, outlets, and fixtures. When you work on your home's electrical systems, it’s important to shut off the power before handling electrical wires or components to avoid serious injury.
Main circuit breakers shut off power to the whole house. Individual circuit breakers connect to circuits throughout the house. Label the circuits to identify easily which parts of the house they serve.
GCFI Circuit Breakers
Ground-fault circuit interrupters ("GFCIs") are receptacles or circuit breakers that shut off power instantly when a circuit shorts or overloads. They are often required for kitchen, bathroom, and outdoor circuits.
