i appreciate the replies. I think the utility thinks the inside wiring is older than it is. We have no grounded phases or unprotected phases. They also mentioned damage to motors which after checking with suppliers I Don't feel is an issue either.
our plant is changing from a 3 wire to 4 wire system . Our utility is telling us this. How will this affect or loads . Most are three phase loads with no need for a neutral. However questions were asked about our protection ? New utility service and switchgear are 4 wire compatable. From there...
