The conductors used to connect the surge-protective device to ground shall not be any longer than _____ and shall avoid unnecessary bends. a) 6 inches b) 12 inches c) 18 inches d) necessary See answer and applicable Code reference The correct answer is: d) necessary The requirements for surge-protective devices (SPDs), 1kV or less, are outlined in Art. 285 of the 2011 NEC. As noted in Sec. 285.12, "The conductors used to connect the SPD (surge arrester or TVSS) to the line or bus ...

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