What it is

An arcing fault is the flow of current through the air between phase conductors or between conductors and a neutral or ground.

 

An arcing fault can be caused by any number of things, ranging from faulty panel wiring to simply dropping a screwdriver or other tools inside a live panel.

 

The energy that results from an arcing fault manifests as an arc flash, an arc blast or a combination of the two.

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Figure 1: Arc Blast!

Courtesy of Westex® by Milliken®