@Arnold D. Cribari posted:So, does it follow that if I simply connected wires between a U Post for each of my transformers (two Z4000 and two ZW), and all transformers are otherwise phased, that all ground wires can be connected to one common ground bus wire without any problems?
As others have answered Yes to this, I believe it requires clarification as long as that one common ground bus wire is sized large enough to carry the return of potentially four transformers. This is where my previous comment on think of the weakest link came in. If you continue to use the TB with the 18 wire between the terminals as you string these together the next TB sees increasing additive current. These TBs towards the end of the string could eventually see excessive current. Therefore, using the current TB with 18 wire would benefit from being returned to individual U terminal on the transformer. Arnold hope this helps.
