is that hard to pull a ground wire... just pull it, there is no guarantee that lock nuts and fittings will always stay tight.
And Brett Who is paying for this? YOU?
Lets say Parallel Runs of 4-500 kcmil copper 350 feet.
Also there is no guarantee that the copper connections are going to be made properly, if the same slacker that did a poor job on the lock nuts lands the EGC, well the whole job goes to heck.
I normally do not like to cross post, I recently put this on another forum.
Something to consider when debating running an copper EGC or not.
On commercial projects with multiple conduits, copper water lines, metal studs, metal ducts, I-beams, re-bar or concrete in contact with the earth, this is all part of the grounding path. I doubt the resistance of a copper EGC can be any lower that all these paths combined. Though I have read that fault current, while taking many of the paths noted tends to stay close to the faulted conductors.
Just a thought.
Oh and after the first fault copper EGC or not many times the EMT connectors and couplings if steel will weld to the EMT.