the xo is where you get your neutral from a transformer. the xo must be grounded.
Looks like everyone is catching up one the board today!
One thing the install got right: there is actually green tape with the yellow on both ends of the wire going to the rod.
I was referring to XO when inappropriately using the term "neutral bus".
Would it be common to lose the incoming ground in favor of local building steel? This is a remodel in a warehouse (not much building steel)
My understanding is that code requires any ground (isolated or not) to be bonded to the neutral (XO). Unbonded is certainly unsafe, as others have stated, as there would not be a fault current return path. I do not see how 3 of the 4 examples, in your first post, meet this criteria--am I missing something?
Not a journeyman electrician,
Kevin H.
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