bdunham7 seems to have some experience on the subject.
Unfortunately just enough to understand the difficulty of the problem, not to offer much of a solution. My ears perk up when I hear the term 'equipotential' because it seems to acquire some mystical meaning and the actual practicalities are sometimes lost. At some level everyone seems to understand that 'equipotential' grounds serve a different purpose than 'fault protection' grounds, but some people seem to think that just because you call it one or the other it magically acquires some metaphysical property that distinguishes it from the other. First, "equipotential" is a
local concept and trying to extend it over any distance runs into some serious issues. Then there is the practical issue that even though some might imagine that the two are somehow separate, they always end up connected and not always in a way that prevents the possibility of fault currents in the nominally equipotential branch. But I'm pretty sure
Ground_Loop already knows all of that and is just...
Sometimes if you have level-headed, common-sense people having a good faith argument you can point out that the regulation isn't completely clear in some way (subject to interpretation) and that it would be really bad to interpret it in one of those ways. Other times you run into folks that only seem to know one thing and they have that pretty much wrong as well, but they won't let go.