I have a length of 8AWG Type AC cable that at one time ran from the panel to an electric cooktop (since replaced by a natural gas cooktop...)
I guess the cable is considered "8-3" as it has one each of a white, red and black conductor. There is no green conductor. This is not the old "BX" cable with cloth conductors--this is more modern.
NEC 250.4(A)(5) and 250.4(B)(4):
...The earth shall not be used as the sole equipment grounding conductor or effective fault current path.
Does this mean that the cable can not be used for any new work? While I have no use for it right now, I would hate to toss it if it can possibly be used for something later on.