Ah, and age old "(1) As a substitute for the fixed wiring of a structure." that is oft considered to declare extension cords illegal as well. I always took that to mean you can't run W cable like you would SE or NM- but OK when used in situations where NM is illegal, like in an aerial drop in a garage.
I contend this is not substituting for the fixed wiring of a structure, as the only thing being substituted is a hard-wire for a plug.
Thanks for the UL quote, that clears up a LOT for me!
