Originally Posted by gfretwell
...
If this is really high leg delta, 240v between legs, you really have to be careful with single phase loads. They should never be on the orange (high)leg even if they are line to line 240v. If they are not perfectly balanced, you will get into trouble. That leg will drift around, depending on the load. ...


Will this still be a problem if you somehow determine which of the 120V lines and the high leg the 2nd transformer is connected to? Idea being that your 240V load would be seen only by the 2nd transformer. Also this assumes that voltage drops in the wiring are minimal.