So if there is a single phase additive polarity XFMR which is wired as subtractive as per the attached drawing. I have asked an engineer and was told not to rewire the secondaries and leave it as is due to all the load being resistive. I was thinking it might short when it is energized, he disagreed. I redlined the drawing how it should be re-wired to have additive polarity so it matches the transformer and was told to leave it as is and energize. The drawing shows my mark ups, if the drawing had no mark ups do you think it would short?