Main breaker
The main breaker!
In an electrical panel, the main breaker is the primary switch that controls the flow of electricity to the entire house or building. It's usually located at the main electrical panel, also known as the main service panel or the main distribution panel.
The main breaker is responsible for:
- Protecting the electrical system: It prevents overloads, short circuits, and ground faults from damaging the electrical system or causing a fire.
- Controlling the power supply: It allows or interrupts the flow of electricity to the entire house or building, making it possible to shut off power to the entire system.
- Providing a safety feature: In the event of an electrical emergency, the main breaker can be tripped to isolate the electrical system and prevent further damage or injury.
The main breaker is typically a large, high-amperage switch that can handle the total electrical load of the house or building. It's usually a 200-amp or 400-amp breaker, depending on the size of the electrical system.
Some common types of main breakers include:
- Molded case circuit breakers (MCCBs): These are the most common type of main breaker, used in residential and commercial applications.
- Arc-fault circuit breakers (AFCBs): These breakers detect and interrupt arc faults, which can cause electrical fires.
- Ground fault circuit breakers (GFCBs): These breakers detect and interrupt ground faults, which can cause electrical shocks.
It's essential to regularly inspect and maintain the main breaker to ensure it's functioning properly and safely. If you're unsure about the operation or maintenance of your main breaker, it's always best to consult a licensed electrician.