I live in a residence with 120v / 208v electrical service. (Measured as leg1: 124v, leg2: 125v, 215v across legs) I am nearly certain that the service is the result of two legs of three phase power. I live in a city near apartment buildings and other commercial structures. Can a single phase buck-boost transformer be used to raise the voltage? I’m concerned because the transformer wiring diagram connects the two legs across the two primary windings (leg1-h1-primarywinding1-h2-h3-primarywinding2-h4-leg2) and I know it’s not advisable to short between out of phase legs.
I have found a couple sources that say this should work, but nothing that tells me why it will work and I’m unsure as to the quality of the sources. Many thanks for your help! Matt