I did not want to use the term 'phase,' as both hots are derived from the same phase of the PoCo feed. I suppose you could say that they were 180 degrees out of phase ... but aren't we making a distinction without a difference.
What dose matter is that everyone understand that the voltages, at the same instant, are exactly the same ... and exactly opposite each other. If one is +120, the other is -120 ...etc. They have to be, as they are 'sections' of the same impulse from the primary side of the transformer.
BTW, I wondered what happened to those receptacles!
