Molded case circuit breaker

Abstract

The present disclosure relates to a wiring circuit breaker and, more specifically, to a wiring circuit breaker having an expanded arc gas discharging port formed through a lower part of an enclosure and thus having enhanced exhaust performance. A wiring circuit breaker according to an embodiment of the present disclosure comprises: an enclosure for the wiring circuit breaker; a base assembly coupled to the inside of the enclosure; an exhaust duct connected to an exhaust part of the base assembly; and a terminal part mount coupled to a terminal part of the enclosure and connected to the exhaust duct, wherein a center part exhaust groove is formed on the exhaust duct, and a center part exhaust hole communicating with the center part exhaust groove is formed through the terminal part mount.

Dependencies are inferred from the claim text.