My welcomes as well, Mike.
Perhaps a simple proposal that says the IG that is allowed to run back to XO must be sized per 250.122 for whatever OCP protects the the conductors in the same raceway.
Thats the problem, there is no OCPD protecting the IG and phase conductors on the secondary side, other than the primary OCPD. I wonder if the proposal should use 250.122 based on the primary feeder, or 250.66 based on the derived conductors. I would hate to have to go to 250.122 for the IG and 250.66 for the EGC on the secondary side. Just one more rule to try to remember.
