I hope I can ressurect this old thread.
In followup to:
"Steve, instead of visualizing it as a wye case, consider it more like a 4-wire-delta arrangement. There will still be ~240V between L1-L2 [and about ~120V L1-N and L2-N.] For the “manufactured” T3, there will be ROUGHLY 240V L1-T3, T3-L2 and ROUGHLY 208V T3-N, but don’t expect nice, even, symmetrical measurements like you’d see with conventional utility-type delta transformer service."
Since a rotary phase converter can serve multiple loads, I have a question regarding the distribution of its output with a 3 phase panel. Is it legal by code to treat this as a 4 wire Delta 240/120V system as outlined above. Can the neutral be brought along from the single phase supply to serve 120V single phase loads at the machine, motor controls in particular.