ECN Forum Forums General Topics of the Trade General Discussion Area Xfmr XO bond location preference

Steve, I am not sure the idea of the PoCo using the earth as a conductor is really that good an idea. I bet that is a major source of "stray voltage". Any place that uses wye distribution will see some voltage imposed on the dirt ... plus the parallel path from the building ground to the pole ground. I actually had a guy who should know better tell me that was why "all" PoCos used delta distribution. Evidently he doesn't get around much.

It all goes back to who has the power over whom. The utilities have long operated in their own world with rules that only they develop. The situation is very similar to elevators, mines, etc. If they spend the appropriate amount of lobby $ every year, especially every election cycle, nobody can touch them. Can you imagine the cost to install a fourth wire to carry the unbalanced load back to the source?

Best practice is to bond everything at the XO tab with quad bbl mechanical lug/ double bbl lugs plus some singles.

It's easier to inspect and understand.

It's easier to teach.