Re: Size for ground wires
The Ground wire should be the same gauge as the supply conductor or same as the combined size, if supply is from difference sources.
All ground wires should terminate at the star point or be joined and continued with a single conductor equal to the combined gauges.
The service ground should also terminate at the Star Point GND.
There was a copy of NFPA79 out there if needing guidance on regs for enclosure wiring.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.