I have what I understand to be a 3-phase service from my provider. It has three legs: A) 120v. B) 208v. C) 120v. A and C are individually used for all 120 electronics and A with C for all 240 single phase connections. A, B, and C run 3-phase motors and welders. How can this be? I just can’t comprehend how I get the 180 degrees wave on 240 single phase motors yet 120 degrees on the 3-phase outputs. This has been set up this way and ran for years. Is this wired wrong or am I not seeing something? I am lost on the understanding and any explanation would be greatly appreciated.
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