For the 480-volt panelboard, the available fault current parameter value is specified in Table 130.7(C)(15)(a).

• A. True
• B. False
• C. Not specified
• D. Only for low voltage

Answer: (A)

At the heart of arc-flash labeling and hazard analysis is knowing the available fault current at the equipment, because that value is used to estimate incident energy and choose appropriate PPE. Table 130.7(C)(15)(a) is the reference table that provides the available fault current parameter values for common voltages and equipment types, including a 480-volt panelboard. This means the available fault current for a 480 V panelboard is specified in that table, so the statement is true. This AFC value represents the maximum fault current that could flow at the panel, given the system impedance and upstream protection, and it’s used with calculations to determine the incident energy and required PPE. Note that this table is used for low-voltage equipment (such as 480 V) and does not apply to equipment above 600 V.