I have 347v lighting in the building i'm in, with 600v buss. I'm interested in testing the lights after changing ballast, starters, igniters, sockets, or whatever the case may be. The question I have is what would you recommend as the easiest, cleanest way to make a 600/347v test receptacle? I was thinking a twistlock receptacle to plug the lights in to try them because all the lights already have a twistlock 347v 20a twistlock plug ends... but I need to get the 600 down to 347 WITH a neutral. let me know what you think!?