Oh, right you are. It's been a long time, and I had a distinct memory that it was less than that, but I looked, and I think that's it. The term for my flavour of 3-phase is apparently "open wye/open delta"; each leg is 240V to the others, but only two are 110V to neutral - the "hi leg" (normally colour-coded orange; normal 3-phase uses black/red/blue) is 208V. The page Jonathan Chapman sent had a good diagram of how it is wired: https://www.engineeringradio.us/blog/wp-content/uploads/2012/02/3-phase-ope… When they were doing some work on the pole decades back, I asked the foreman how it worked, and he drew a diagram to show me; I had forgotten it, but seeing that, that is it. The A and C are produced off one feed phase, but the B comes from the second feed phase. Noel