I understand that in 1996, NFPA outlawed the NEMA 10 series outlet for new work. This is an ungrounded outlet, which provides 120/240v split phase (hot-neutral-hot).
I wonder if the same is also true of its ungrounded brothers in multiphase: The NEMA 2 series, for 240v single phase. The NEMA 11 series, which were used in 208/240v delta 3-phase. And the NEMA 18 series, used typically in 208v wye 3-phase. Are these also outlawed?
Of course, NEMA 1-15 remains universally common despite being ungrounded.
I guess what I'm asking is, did NFPA outlaw all >120v ungrounded outlets? Or did they only single out NEMA 10 because of its frequent appearance in household circuits?