Circuit Breaker Method of Operation

Circuit breakers shall be capable of being closed and opened by manual operation. Operation by other means, such as electrical or pneumatic, shall be permitted if means for _____ operation are also provided.

a) automated
b) timed
c) manual
d) shunt trip

See answer and applicable Code reference

The correct answer is: c) manual

The rules for overcurrent protection can be found in Article 240 of the 2011 NEC. Part VII of this Article covers circuit breakers. As noted in Sec. 240.80, "Circuit breakers shall be trip free and capable of being closed and opened by manual operation. Their normal method of operation by other than manual means, such as electrical or pneumatic, shall be permitted if means for manual operation are also provided."