In what unit is the capacity of a circuit breaker rated?

The capacity of a circuit breaker is rated in amperes, which measures the amount of electric current flowing through the circuit. This rating indicates the highest amount of current that the breaker can handle before tripping to protect the circuit from overload or short-circuit conditions.

Understanding this unit is crucial because it helps determine whether a circuit breaker can safely manage the electrical load of the devices connected to it. If the load exceeds the amperage rating, the breaker will trip, interrupting the circuit to prevent damage or electrical fires. This is particularly important for ensuring both the safety and functionality of electrical systems in homes and businesses.

The other units listed (volts, wattage, and ohms) serve different purposes in electrical measurements. Volts measure electrical potential or voltage, wattage reflects power consumption (volts multiplied by amperes), and ohms denote electrical resistance. Each of these units plays a role in understanding electricity, but when it comes to circuit breakers, the critical factor is their amperage rating.