Main Circuit Breaker Diagram

Circuit breakers snap into place onto one or both of the bus bars to provide power to the circuits.

Main circuit breaker diagram.

The purpose of the main circuit breaker. The wiring into a breaker must correspond to its amperage. Branch circuit breakers are designed to shut off power to individual circuits if they overload by trying to draw more power than the wires can safely handle and the main circuit breaker is much the same. 8 gauge wire goes with 40 or 60 amp two pole breakers.

This diagram illustrates some of the most common circuits found in a typical 200 amp circuit breaker service panel box. Single pole circuit breakers provide 120 volts and connect to just one hot bus bar. How to wire a breaker circuit. The main breaker shuts off power to the entire house if the overall load demand grows too high or if there is another serious problem in the.

This page contains wiring diagrams for a service panel breaker box and circuit breakers including. Unlike a fuse which operates once and then must be replaced a circuit breaker can be reset either manually or automatically to resume. A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by excess current from an overload or short circuit its basic function is to interrupt current flow after a fault is detected. Circuit breaker panel box wiring diagram.

A breaker circuit is an electrical switch that cuts off electrical flow in the event of a possible short circuit or overload. The two thick black service wires feeding the main circuit breaker each carry 120 volts from the electric meter and feed the two hot bus bars in the panel.