What type of circuit breakers are allowed as branch-circuit OCPDs?

Molded case circuit breakers are suitable for use as branch-circuit overcurrent protective devices (OCPDs) because they are specifically designed to protect electrical circuits and equipment from overloads and short circuits. These breakers can handle a range of current ratings and are equipped to trip when they detect a fault condition, thereby interrupting the flow of current and preventing potential damage to the wiring and connected devices.

Molded case circuit breakers also provide a reliable means of protection due to their durable construction and ability to be reset after tripping, making them well-suited for residential, commercial, and industrial applications. Their design allows them to be incorporated easily into various electrical distribution systems, adhering to National Electrical Code (NEC) requirements.

Miniature circuit breakers and resettable circuit breakers, while they also offer overcurrent protection, might not be classified as branch-circuit OCPDs in every context as they can serve different functional roles or have limitations in current ratings. High voltage circuit breakers are intended for high-voltage applications and are not used for standard branch circuits, as their operational characteristics differ significantly from those required in typical branch circuit protection.