Observations on a UPS - follow up to a previous post
No, it's 180' phase shift. The two legs are directly out of phase,
therefore they sum. It's not three-phase, it's what they call
single-phase (even though it's really two phases).
--scott
In common parlance it's known as "split phase", which is not technically
correct. Proper description of this is "3-wire, single-phase, mid-point
neutral system".
Sparky
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