Which table provides the available fault current parameter value for a 480-volt panelboard under arc flash PPE category method?

Which table provides the available fault current parameter value for a 480-volt panelboard under arc flash PPE category method?

• A. Table 130.7(C)(15)(a)
• B. Table 130.7(C)(15)(b)
• C. Table 130.7(C)(15)(c)
• D. Table 130.7(C)(15)(d)

Answer: (A)

The key idea is where to look for the value that feeds into the arc flash PPE category method for a 480‑volt panelboard. For equipment at 480 V (which falls in the 600 V and under category) and of the panelboard type, the correct source is the subtable that specifically covers panelboards at voltages up to 600 V. That table provides the available fault current parameter value used to determine the PPE category under the arc flash PPE method. The other subtables cover different equipment types (like switchgear, MCCs, or other voltage ranges) and don’t give the relevant value for a 480‑V panelboard, so they’re not applicable.

The key idea is where to look for the value that feeds into the arc flash PPE category method for a 480‑volt panelboard. For equipment at 480 V (which falls in the 600 V and under category) and of the panelboard type, the correct source is the subtable that specifically covers panelboards at voltages up to 600 V. That table provides the available fault current parameter value used to determine the PPE category under the arc flash PPE method. The other subtables cover different equipment types (like switchgear, MCCs, or other voltage ranges) and don’t give the relevant value for a 480‑V panelboard, so they’re not applicable.