The arc flash PPE category method uses the AFB to determine PPE selection.

• A. True
• B. False
• C. Not specified
• D. Only for DC systems

Answer: (A)

In this method, PPE is chosen based on the level of arc-flash hazard at the worker’s distance, and the distance is defined by the Arc Flash Boundary. The boundary marks where the incident energy reaches a threshold (often around 1.2 cal/cm^2) for a typical scenario, and it helps determine how protection should be applied. When you perform an arc-flash analysis, you find the incident energy at the working distance and then use the PPE category tables to select the appropriate minimum PPE category (ranging from Category 1 to Category 4). The Arc Flash Boundary effectively guides you to the region where that hazard level applies, so the PPE category method relies on that boundary to decide what protection is required.

So, using the Arc Flash Boundary to determine the necessary PPE category is the intended approach for this method.