Well, I'm not an electrician, so I'm not sure. I think the grounded phase has two pots and the regular 3 phase has three.

Entergy uses grounded phase on only 40 hp or less. Coop uses grounded phase uses it on up to 60 hp that I have.

The copper pipe in place of a fuse in the center fuse position is what has me confused. And alse the 480 to ground on the contactor coil.

This is something the power co's are doing, not something us rednecks have come up with.

Thanks,

John