Don, SWER is a seemingly bizarre practice by typical US standards, but has a decent track record for some. First saw it in southern Alberta in the late ‘70s. There, it was typically limited to a 15kVA transformer for rural farmhouses served at 14.4kV, with annual(?) ground-resistance checks. That corresponds to a transformer-primary/ground-electrode current of about 1 ampere, FWIW.
https://www.electrical-contractor.net/ubb/Forum1/HTML/001230.html https://www.electrical-contractor.net/ubb/Forum1/HTML/002442.html [This message has been edited by Bjarney (edited 07-07-2003).]
