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When are Arc Flash studies required?

Question asked by mylumbermill on Oct 28, 2016
Latest reply on Oct 31, 2016 by Steve Benton

Apologies if this has been asked before. Does anyone know if there is a voltage threshold for performing Arc Flash calculations? I can't seem to identify a threshold in either 70 or 70E, it merely says "arc flash risk assessment shall be performed..." in 130.5 in 70E. Any help appreciated.