Surge-Protective Device Conductor Length

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 S

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