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Message: <blockquote data-quote="Dave70968" data-source="post: 3200118" data-attributes="member: 13624">That's what I understand as "split:" a 240V phase with a tap in the middle, yielding a pair of 120V circuits exactly 180° out of phase; it doesn't quite look that way on the graph, but if you take either side against the middle, it's 120V sine wave, and if you take one side against the other, it's 240V sine wave.My understanding of a "phase short" is closer to a three-phase, with one shorted against the next (and no, I don't understand quite how to convert between delta and wye configurations, which complicates that definition--it makes perfect sense in a wye, but none at all in a delta).Again, I'm leery of derailing the original thread; would you mind writing a new thread with a primer so those of us interested can have this discussion?</blockquote>