The type of circuit breaker that you need depends on the characteristics and the type of circuit that where it will be used, one example is if you have knob and tube wiring, most homeowners or maintenance technicians don’t have to worry about that detail, as that is already figured out by electrical engineers, who design these devices to set standards developed by regulating bodies wherever they may be used, sometimes, depending on the electrical standard set by countries, they may be used across borders as well. A circuit breaker can be designed for one circuit, or multiple circuits – typically one, two or three although there are various configurations specifically built to work in unique circuits. It is important to contact a licensed electrician when you need to do dangerous electrical work. Circuit breakers can also be made to detect leakage current and these are called ground fault circuit interrupters or for short the (GFCI). They are installed in specially designed boxes called an electrical panel or a panel box, so that the exposed parts of the circuit breaker is protected from being accidentally touched. These devices can be switched back on if they are automatically switched off (tripped) when it detected a problem in the circuit. Contact a certified electrician in your area for help as this situation can pose a danger to someone who is not trained in this field.
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