Each circuit breaker is marked with what to indicate its capacity?

Each circuit breaker is marked with its maximum current load in amperes to indicate its capacity. This specification informs users how much current the breaker can handle before it trips to prevent overload and potential damage to the electrical system. Properly understanding this marking is crucial for maintaining safety and functionality within electrical circuits, ensuring that the breaker can adequately protect the wiring and connected devices from drawing too much current, which could lead to overheating and fire hazards.

While resistance in ohms, voltage ratings in volts, and types of current (such as AC or DC) are important characteristics in electrical systems, they do not directly indicate the capacity of a circuit breaker in the same way the maximum current load does. The amperage rating is the primary reference for ensuring the breaker is suited for the electrical load it protects.