stevebea
Senior Member
- Location
- Southeastern PA
One of my co-workers was telling me about a local business (industrial) where he was working and telling me they have two services to the building, 600V Ungrounded Delta and 480V Wye.I started thinking about this scenario.... If both services are bonded to building steel then isn't it probable that if there was a fault to ground on the Delta service that the fault current would would follow the path back to the XO on the Wye service and trip the GFP on the Wye Main and leave the Ungrounded Delta service energized? I can find out more details if needed.
Steve
Steve