What does MCCB stand for?

What does MCCB stand for?

• A. Molded-case current breaker
• B. Modular circuit breaker
• C. Molded-case circuit breaker
• D. Magnetic circuit breaker

Answer: (C)

MCCB stands for Molded-case Circuit Breaker. The term “molded-case” describes the enclosing housing, which is made of a molded insulating material, and it signifies a robust, higher-current protective device used in distribution panels. The phrase “circuit breaker” indicates the device’s role: it interrupts current during overloads or short circuits to protect the wiring and equipment. The other phrases don’t fit because they either change the meaning—replacing “circuit” with “current”—or imply a different design concept—such as “modular” or focusing only on the magnetic trip mechanism rather than the molded enclosure.

MCCB stands for Molded-case Circuit Breaker. The term “molded-case” describes the enclosing housing, which is made of a molded insulating material, and it signifies a robust, higher-current protective device used in distribution panels. The phrase “circuit breaker” indicates the device’s role: it interrupts current during overloads or short circuits to protect the wiring and equipment. The other phrases don’t fit because they either change the meaning—replacing “circuit” with “current”—or imply a different design concept—such as “modular” or focusing only on the magnetic trip mechanism rather than the molded enclosure.