The arc flash PPE category can be determined through an incident energy analysis.

The arc flash PPE category can be determined through an incident energy analysis.

• A. True
• B. False
• C. Sometimes
• D. Only for DC

Answer: (B)

The level of arc flash protection needed is tied to how much energy could be released in a fault and how close you are to the arc. You can determine the required PPE in two common ways: by performing an incident energy analysis to calculate the actual energy at your working distance, or by using the task-based or table method that assigns a PPE category based on the voltage and the specific task. Because there are these two accepted paths, the PPE category isn’t determined exclusively by an incident energy analysis. You could determine it from the energy calculation, but you could also determine it directly from the predefined tables without doing a full energy calculation. That’s why the statement isn’t universally true.

The level of arc flash protection needed is tied to how much energy could be released in a fault and how close you are to the arc. You can determine the required PPE in two common ways: by performing an incident energy analysis to calculate the actual energy at your working distance, or by using the task-based or table method that assigns a PPE category based on the voltage and the specific task. Because there are these two accepted paths, the PPE category isn’t determined exclusively by an incident energy analysis. You could determine it from the energy calculation, but you could also determine it directly from the predefined tables without doing a full energy calculation. That’s why the statement isn’t universally true.