Hennepin County

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PROJECT QUESTION: The lighting feeds are fed with No. 8 copper USE cable and the overcurrent protection for these circuits is a 60A CB. The NEC states that the max ampacity of No. 8 USE would be 40A. Is this not a violation of the NEC?

Question: The lighting feeds are fed with No. 8 copper USE cable and the overcurrent protection for these circuits is a 60A CB. The NEC states that the max ampacity of No. 8 USE would be 40A. Is this not a violation of the NEC?

Response: Neither SL1 or SL2 specify a temperature rating for equipment terminals. Replace the four 60A breakers in the lighting cabinet with four 40A breakers; removed breakers shall be returned to the City. Cost of breakers to be included in the, Service Cabinet Type A (Mod), pay item. Plan sheet SL6 and SL-2.4.E will be revised.