NFPA 70E Section 130.5(F) allows two options for selecting the proper level of PPE:

(1) The incident energy analysis method in accordance with 130.5(G)

(2) The arc flash PPE category method in accordance with 130.7(C)(15)

Either, but not both, methods may be used on the same piece of equipment. The results of an incident energy analysis to specify an arc flash PPE category in Table 130.7(C)(15)(c) is not permitted.

As mentioned above, 130.7(C)(15) can be used instead of performing an incident energy analysis. When choosing this option, Table 130.7(C)(15)(a) or (b) is used to determine the arc-flash PPE category and the arc-flash boundary. (See image)

• On the left side of the table is the description of the equipment.
• In the middle of the table is the arc-flash PPE category.
• On the right side of the table is the arc-flash boundary.

In order to even begin to use this table, the qualified person must already know several key pieces of information:

• The voltage of the equipment being worked on while energized
• The maximum available fault current at the equipment being worked on
• The maximum fault clearing time of the overcurrent device protecting the equipment being worked on
• The needed working distance in order to perform the task

If any one of the above are unknown, then Table 130.7(C)(15)(a) or (b) cannot be used, and an incident energy analysis must be performed instead of using the Table.