Different kinds of current ratings of circuit breaker.
Current Ratings of Circuit Breaker Several current ratings are used to describe a circuit breaker's ability to transport current, including In, ICS, ICU, and ICW. An overview of each rating is provided below. 1- In (Nominal Current) The nominal current rating of a breaker is referred to as the "In" current of the breaker. It is the maximum continuous current that the breaker can support without tripping or getting damaged. The manufacturer normally specifies the nominal current rating, also known as the ampere rating, and prints it on the breaker's label. A 50A breaker, for instance, has a nominal current rating of 50 amps, which means it is made to withstand a maximum current of 50 amps without tripping or breaking. To prevent an overload that could damage the circuit or pose a fire hazard, the breaker will trip if the curren...