"DJ Delorie" wrote: Technically (not that it matters in practice), the hot
wires are *in phase* but with opposite polarity voltages. (clip)
^^^^^^^^^^^^^^^
If there is ANY difference between two voltages of opposite polarity, and
two voltages 180 degrees out of phase, I can't find it with an oscilloscope
or in my mind. I don't think there is any difference, but I may also be a
pedant.