I have never heard of using ground as neutral, legitimately that is.
It is certainly againts the code to use it at present.
You cannot ground one side of the 240 as is done in Europe and elsewhere, it will blow a fuse right away.
They use 240v only system, which does not use a centre tap grounded neutral so they are able to ground one side of the 240v and make this neutral.
The star point of a 3 phase supply is the neutral in this case.
You basically have two choices, run a neutral or set up a local 120v supply using a 240v/120v transformer.
Another is to obtain a switching supply, most have a range of 90v-240v AC input.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.