Ozro wrote:
Thank you both for your replies.
Robert, I was planning to use ArcPro only if the justification could be made that three phase arcs were not likely to occur in deadfront SWGR. If I am reading that table correctly, OSHA accepts using ArcPro for single phase calculations at 15kV.
OSHA requires that you use 3 Phase bolted faults for enclosed equipment. They allow you to use ArcPro (using line to ground fault current) and then use "with multipliers" to increase the AF energy to a supposedly equivalent 3 phase value. I have done a lot of research and contacted many other engineers and nobody seems to know what the multipliers should be.
On 208 to 15 kV systems, I would recommend using IEEE-1584-2018 to determine the AF energy and boundaries for both open and enclosed equipment.