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Service entrance conductors shall have a protective device in each ungrounded conductor, on the load side of, or as an integral part of the service entrance switch. The protective device shall be capable of detecting and interrupting all values of current in excess of its minimum trip setting or minimum melting point which can occur at its location. A fuse rated in continuous amperes not to exceed three times the nominal current rating of the conductors, or a circuit breaker with a minimum trip setting of not more than six times the nominal current rating of the conductors, will be considered as providing the required protection. The nominal current rating of the conductors shall be as required by Section 2821.
EXCEPTION: Where the serving agency agrees to provide overcurrent protection in accordance with the above requirement, no further overcurrent protection is required.
(Title 24, Part 3, Section 230-208.)
NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code; and Section 18943(c), Health and Safety Code.
1. Editorial correction filed 11-2-83 (Register 83, No. 45).
2. Amendment filed 12-10-87; operative 1-9-88 (Register 88, No. 1).