Arc Flash Boundary Diagram. Heat energy within this area could cause greater than second degree burns. What is an Arc Flash Boundary.
Arc Flash Boundary Defined The arc flash boundary is detailed as a safe approach distance from parts or equipment that is currently energized also known as live According to the NFPA 70E standard there are complex calculations that one can perform but the general rule is that exposure at the arc flash boundary is 12 calcm squared. An arc flash boundary is the distance at which an electrical arc can flash outward and endanger employees working on electrical equipment. Heat energy within this area could cause greater than second degree burns.
The qualified worker must insure no one is allowed in this area when covers are removed.
Refer to Diagram 18 in Annex B for a more detailed description of correct PPE categories. 4 Electric Arc Flash Hazard Management Guideline Electric Arc Flash. Conductive Articles of Jewelry and Clothing. An update to the 2012 version of Table 1304 includes voltages up to 800kV.
