This article mentions another issue with arc flash and that is safety area/barrier. The standard specifies a distance for wearing PPE, another that "qualified" personnel are allowed to approach and a greater distance for non-qualified people. Bottom line=expose as few people as necessary to the arc flash hazard. I usually ty to form some sort of barricade-doesn't take much -to keep people back. One, to keep them from a hazad, two, the last thing I want if I am n an energized panel is a non electrician trying to look over my shoulder-especially if I need to get away!
Interestingly, I was redoing a similar service a year ago and redoing underground service conductors to a transformer. The POCO employees asked me if the I wanted primaries (less than 3 feet from where I was digging) de-energized. Really? You have to ask?