Ground-Fault Protection of Service Equipment

As defined by Sec. 230.95, the rating of the service disconnect shall be considered to be the rating of the largest _____ that can be installed or the highest continuous current trip setting for which the actual overcurrent device installed in a circuit breaker is rated or can be adjusted.

a) fuse
b) circuit
c) conductor
d) all of the above

See answer and applicable Code reference

The correct answer is: a) fuse

Article 230 covers service conductors and equipment for control and protection of services. Part VII of this Article focuses on the overcurrent protection requirements for service equipment. As noted in a portion of Sec. 230.95, "The rating of the service disconnect shall be considered to be the rating of the largest fuse that can be installed or the highest continuous current trip setting for which the actual overcurrent device installed in a circuit breaker is rated or can be adjusted."

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