Circuit Breakers not only give branch circuits that control circuits in our home a place to connect to, they also protect those circuits and the devices connected to them from circuit overloads. There are variations of circuit breakers for specific uses and many different amperage ratings for circuit breakers, based on wire size and required loads for the circuits.
Electrical panels are made by different manufacturers and they have their own specific brand of breakers that are required for proper and safe function. Circuit breakers are designed to both be turned off and on manually, and to automatically trip when there is a problem. Yet others prevent ground faults and still others are designed to prevent arc faults. The main breaker controls power to all of them and is the main shut off for an electric panel. Do you know about circuit breaker anatomy?
Photo: Timothy Thiele