All questions and answers are based on the 2005 NEC. Q. Does the Code require bonding around raceway knockouts for 277V or 480V feeders and branch circuits? A. You must bond metal raceways or cables, containing 277V or 480V circuits, terminating at ringed knockouts to the metal enclosure [250.97] with a bonding jumper sized in accordance with Table 250.122, based on the rating of the circuit overcurrent
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