When circuit breakers are classified within a range of 100A through 2,000A, what are these numbers typically referred to as?

The numbers referring to the range of 100A through 2,000A in circuit breakers are typically referred to as "frame size." Frame size indicates the physical dimensions and design of the circuit breaker. It determines not only how much current the breaker can handle but also its installation compatibility within an electrical panel. Frame size is crucial because it influences the maximum amount of current the device can interrupt safely during an overcurrent event. This classification helps in selecting the appropriate breaker based on the requirements of the electrical system.

While terms like "breaker size," "load rating," and "current rating" may also be relevant in specific contexts, they do not specifically denote the structural characteristics of the circuit breaker itself, which is what frame size encompasses. Understanding this terminology is important for ensuring both proper installation and functionality within electrical systems.