I'm looking to clarify the appropriate actions for determining the arc flash risk of a UPS battery bank operating at 120VDC (industrial application).

Table V.3 indicates that the applicable voltage for consideration of the table method is a minimum of 150VDC. However, Figure F.3 indicates that 100V is the cut-off where an arc flash analysis may occur. Is there risk at 120V?

This link provided useful guidance, but I'm looking to understand how Z462 interprets the risk and ultimately some guidance that can be used for our facility maintenance personnel.


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