I’m not sure I’m following this. Is the inspector saying that a GEC sized per Table 250.66 is required to be run and connected to the #4 CU for the Ufer?
If so, I would think that since 250.66[A] clearly says that portion of the conductor that is the sole connection to the CEE/Ufer only needs to be sized at #4 CU, the #4 from the Ufer should be able to be run to the main service equipment and connected to the neutral bus as is without issue.
Don’t we basically do the same thing with #6 CU and ground rods?
