![]() This will provide accurate information that can be used to set the distances in your facility. The flash-protection boundary is determined through iterative calculations based on the same equations used to. Most companies will use software programs where they can enter in the voltage information about a piece of equipment, and it will calculate the arc flash boundary automatically. Step 7: Determine flash-protection boundary. The exact method of calculation is different for AC and DC systems as well, so it is critical to have this information available. Flash Protection Boundary (outer boundary): The flash boundary is the farthest established boundary from the energy source. How to Calculate the Arc Flash BoundaryĬalculating an arc flash boundary is going to be based on the voltage of the equipment that would cause the arc flash. When they are performing this task, here are the things that they will need to do. Calculating where the boundary will be in any given situation is something that should be done by an electrical engineer. This is the level at which it will cause only second-degree burns rather than third-degree. The boundary reflects the distance from an electrical device at which the incident energy from an arc flash would be equal to 1.2 cal/cm 2 (5 J/cm 2 ). ![]() An employer operating within the arc-flash boundary must use personal protective equipment (PPE) and/or other safety equipment. An arc flash boundary is the distance from the equipment in question to the point where the energy that would be present in an arc flash is 1.2 cal/cm2. An arc-flash boundary is a shock-hazard approach boundary that serves as a minimum safe distance from electrical equipment.
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