Hello,
I have the following situation with the equipment grounds in my house (USA), and I am wondering whether it is OK. In particular, it seems like there is a "ground loop", although I don't understand the precise definition of that term, or why it is bad.
Main Panel Ground in 1/0 SER Neutral/ ---------------------- Subpanel Ground Ground Bar \ Bar / | \ | / | \ | / | \ | Water Ground \ | Service Rod \ Clamp | Ufer ------------ Ufer Ground 1 Ground 2
Should I nix the Ufer ground connection at the subpanel? As the diagram suggests, each Ufer ground is a separate 20' length of bare copper wire, but they are clamped together inside the concrete foundation. FWIW, I plan to make the main panel a simple disconnect and make the subpanel the primary load center, although I believe that distinction is immaterial under the NEC.
Thanks, Wayne