I was hoping someone could tell me if this setup is correct or a code violation. I,m feeding a 400 amp 3 phase high leg 240 volt panel with 500mcm size wire. From this panel I will feed a 150 amp panel 2 phase 240 volt. The 400 amp panel is only needed for six 3 phase a/c units.Do I need to run another 500mcm wire for the neutral.Or is all I have to do is run a 1/0 for the 150 amp nuetral? Thanks in advance.
