What does the rated current of a circuit breaker indicate?

The rated current of a circuit breaker indicates the continuous current it can carry safely without tripping under normal operating conditions. This value is crucial because it provides guidance for the maximum current that can flow through the circuit breaker without causing overheating or potential damage to the electrical system. When the current exceeds this rated value, the breaker is designed to trip, thereby providing a protective function to prevent electrical fires and equipment damage.

Understanding this concept is essential for electrical work, as selecting a breaker with an appropriate rated current ensures that the electrical system remains within safe operational limits during its use.