English: This is a picture of a type of circuit breaker used in residential installations used in North America. Note that this type of breaker mounts in an electrical panel by way of a catch on the bottom and the blade contact on the top. Electricity is fed into the circuit breaker through this blade contact. A terminal lug is located on the bottom of the circuit breaker where the wiring to the circuit is connected to be fed from the breaker. This breaker also has two separate switches inside of it, effectively enabling this single unit to feed two separate circuit. Since the switches are not ganged, the two circuits can be individually switched.