When using the arc flash PPE category method, the worker must maintain a working distance less than the working distance parameter value for the type of equipment to be worked on.

When using the arc flash PPE category method, the worker must maintain a working distance less than the working distance parameter value for the type of equipment to be worked on.

• A. True
• B. False
• C. Not specified
• D. Depends on PPE level

Answer: (B)

In arc flash PPE category planning, the distance from the arc to the worker is what determines the required PPE. Incident energy increases as you get closer, so the working distance parameter sets the minimum distance you must maintain to stay within the chosen PPE category. If you move closer than that parameter, the incident energy could exceed the protection your PPE provides, increasing the risk of injury. You should stay at or beyond the specified distance (or use a higher PPE level if you must work closer). Therefore, saying you must maintain a distance smaller than the parameter value is not correct.

In arc flash PPE category planning, the distance from the arc to the worker is what determines the required PPE. Incident energy increases as you get closer, so the working distance parameter sets the minimum distance you must maintain to stay within the chosen PPE category. If you move closer than that parameter, the incident energy could exceed the protection your PPE provides, increasing the risk of injury. You should stay at or beyond the specified distance (or use a higher PPE level if you must work closer). Therefore, saying you must maintain a distance smaller than the parameter value is not correct.