Don't know how he moved it. It wasn't a large building. Probably a 12x12 or something like that. I'm on my computer now. I tried to type the question above in on my phone and it didn't give me enough room to finish. There is a 60 amp breaker ahead of this feeder. Like I said the actual load is 30 amps or less. The biggest load he will have is a window air condition ( 20 amp. ) and I'm assuming it is a 120 volt a/c. I figure without even without any demand factors the #4 USE should be a large enough wire to carry the load, even at that length. Just double checking myself on the figures. He wants me to splice the wire for him underground.
I figure if the load was even 4000 watts./240 = 16.6 amps, the wire is big enough, if I am figuring it right, and according to what he told me he had in the building, the total don't even come up to that if he runs everything at one time, which he won't.
Thanks again