Early I do not get your point.
THWN, RHW, XHHW, etc are all listed for wet locations.
However no where in their listings will you find the words for underground or above ground use.
IMO that leaves it up to us.
However you do find the words "cable for aboveground installation" in the listing for SE.
IMO that clearly tells us the cable is not for underground use.
They could have simply listed it as cable for wet locations but they did not.
Maybe a future code proposal is needed.
Bob
