Oral argument with a high-time veteran will not work.

Instead get xerox copies of the relevant wiring diagrams -- blown up of course.

Draw a one-line showing the SERVICE and detailing its bonding and GEC.

Show the derived 208Y120 panel...

And then detail the voltages with Tensors/Vectors...

-----

His mental block is two fold: you're too young to be lecturing HIM...

AND, his stuff 'works' ... so some other failure mode must be the cause.


Tesla