Re: continuous grounding conductor
Bob: Do you think the rusted, painted, monocoat covered, loose, steel makes a credible ground electrode, when splices are not permitted in a ground electrode conductor?
Would you think the steel makes a better electrode when the building electrode is the same distance or less.
The grounding requirements, for a separately derived system, were written when the premises wiring system did not have a ground electrode system.
This is why there is no reference to the building ground, it did not exist at the time.