interconnecting different voltage systems without galvanic isolation ok per NESC NEC?

[Electric-Light]

http://forums.mikeholt.com/showthread.php?t=181601

I can't find the Inverter Step-down thread i was talking in for some reason. There are many experts here on technicalities around this matter and I thought I'd have better chance here than Safety subsection

 

[charlie b]

We don't allow posting the same question more than once. I am closing this one. The discussion is here:
http://forums.mikeholt.com/showthread.php?t=181601