All the money is in the trench -- not the pipe.
Always oversize U/G pipes. If the conductors need 3/4" EMT -- go with 1" PVC if not 1.25" PVC. It's dirty down there.
Add a spare -- every time.
NEVER use PVC under 1" unless it is a trivial short hop for a hot and a neutral.
Because all the money is in the trench -- not the pipe.
As CAT standards keep ramping up -- the larger the sweep must be.
Just another reason to shun small diameter underground runs.
