I looked at a job today where they want an old Zinsco sub panel replaced, it is an interior panel located outdoors no less. When I removed the deadfront I noticed there were 8 120 V hots leaving in pipe along with just one #8 neutral. It all terminates somewhere in the very low attic crawlspace.
I have seen this scenario discussed before but I don't recall if it was ever determined a code violation, provided the neutral was sized properly for the load.
Anyone know?.........Thanks, Brian