What do the numbers on circuit breakers signify?

The numbers on circuit breakers indicate the current rating in amps at which the circuit breaker is designed to trip or "pop out." This is a critical safety feature in electrical systems that protects against overload conditions. When electrical current exceeds this rating due to a fault or excessive demand, the circuit breaker automatically interrupts the circuit, preventing damage to wiring and the risk of fire.

Understanding the importance of the current rating helps in selecting appropriate circuit breakers for different applications, ensuring both safety and functionality. This rating does not pertain to voltage capacity, resistance level, or frequency, which are separate electrical concepts, thus confirming the accuracy of the option regarding current in amps.