Did you solidly ground the wye point on the 480Y/277 side?
The utility side is 240 delta high leg with a grounded-neutral center tap? (The service; not the transition transformer)
If yes to both,the inspector needs his head examined (more appropriately, his credentials revoked).
If no to either or both, the inspector may have a point.![]()
Playing Devils advocate, does the same logic apply in reverse? if you make an error should your credentials be revoked? I am all ways amazed how people think. If the person at the inspection can not explain his or her own work, why is the inspector wrong?