Okay, now I understand. JKB's method simply combines the 2 120Vac leads at the home service drop, drops the need for the neutral wire, adds a transformer to restore your output to what you had originally at the home service drop. I asked because in all my years, I have never seen it done that way, yet in reality, on "long" runs, I suppose it is done that way by the Utility supplier, when adding another service drop from a transformer off the 1200Vac service main lines.

Thanks for finally explaining the how and why of your design, JKB. I understand it completely, yet still believe on THIS run, I'd think a transformer is much more costly than the additional wire, overall. Plus, a user quality transformer is prone to failures much more often than those used by utilities. As far as I can see, the transformer will save a minor voltage loss (assuming there is not already an equal loss on the 240V feeder line), probably cost more, and loses a few total available amps over direct feed.