Dar measurement of one breaker

You're asking about the measurement of a single breaker in a circuit breaker panel!

The measurement of a single breaker in a circuit breaker panel is typically referred to as the "ampere rating" or "amp rating". This is the maximum amount of electrical current that the breaker is designed to handle safely without overheating or tripping.

The ampere rating of a breaker is usually measured in amperes (A) and is typically marked on the breaker itself. For example, a 15-amp breaker is designed to handle up to 15 amperes of electrical current.

Here are some common ampere ratings for breakers:

It's important to note that the ampere rating of a breaker is not the same as the wattage rating of an appliance. Wattage is a measure of the total power consumption of an appliance, while ampere rating is a measure of the maximum current that a breaker can handle.

I hope that helps!