If you’ve ever seen an arc flash in person, you know how sudden and terrifying they can be. Often fatal, arc flashes occur “whenever there is a loss of insulation between two conductive objects at sufficient potential (voltage)” (ABB Inc., 2009). In other words, they occur when there is an arc fault; the air becomes a conductor and an extremely dangerous electrical explosion ensues. If you're working near an energized area, you're at risk for arc flash exposure.