Sparky,

I think that We, "as a trade", I mean the guys in the trenches may have a better grasp on the fundamentals of gounding than the "Theorists" that specify IG and mean a grounding rod alone and no bonding of the neutral in a 3phase Y transformer. They must teach that in MIS school, I have no Idea where they get that from.

Scott, maybe you, as an 'EE type' can give us some insight into this rationale? [Linked Image]

Bill

Bill