Circuit Breakers

Circuit breakers are an important element in circuit protection. When a circuit breaker detects a fault caused by overload, a power surge or a short circuit, the switch will automatically turn off and interrupt the power supply. In this way, the circuit is protected from more serious damage. Afterwards it can be reset either manually or automatically. Circuit breakers are available in a number of sizes depending on voltage class, current rating and the type of circuit breaker. One of the most common are standard circuit breakers. They can be single-pole, which is adequate for most domestic installations and double-pole which is necessary for larger appliances such as dryers. The Ground Fault Circuit Interrupter (GFCI) is another form of circuit breaker. It is more commonly used where there is water such as bathrooms or outdoor areas. AFCI (Arc Fault Circuit Interrupters) respond to a sustained amount of heat rather than power surges and can prevent electric fires. Some modern buildings are now being installed with CAFCI (Combination Arc Fault Circuit Interrupters). Circuit breakers can be found wherever there are electric currents though their installation would depend on the power needs of the building. Industrial facilities would not use the same system as private residences.