[Richard]

On Mark's diagram, he chose to use a two pole contactor and he interrupts both the hot and the neutral leg. If you look at my schematic in the original post, I only interrupt the hot leg but I run a separate neutral to the compressors to take the load off the board. Both methods work and accomplish virtually the same thing.

I don't comment on wire colors because they could be different from coach to coach. That's why I stick to trying to explain the fundamentals and have the installer apply the fundamentals to their unique situation. I am not trying to be a smart aleck. When Bill and I did the install on his coach we discovered his wiring was not exactly like mine.