Question??? What are you trying to run off this phase converter? If it is a mill there is probably
no concern where the high voltage leg goes, as the average mill ( Bridgeports and their clones)
use drum type switches and contact blocks, and have no magnetic contactors that will be adversely affected by high voltage. On the other hand most lathes are full of magnetic contactors, and most 3-phase band saws and compressors contain at least one. Hope I am
being of some help. I have built my own phase converters, that are still in use, and wired my
own shop and a few others without incident, if you want more assistance it would probably
be best if we talked on the phone, weekend cell minutes are free! Send me a private message if you would like my phone number,...........Bob