Hi

I am trying to run this AWG 6-2CU UF-B underground feeder cable from the basement to an outdoor well pump controller. This is a three wire (two isolated + ground) cable that is to be connected at 240Vac from the main panel and routed out for about 200ft. The controller is supposed to limit the current to 20A.
I had the 18" deep outdoor trench dug, and I would like to protect the cable on most of its outdoor length.
I read however some post (not on thi site) stating that one cannot run underground wire through conduit on the entire length of the cable because of possible cable outgasing. I still want my cable protected though, for future landscaping projects.
1. If I want to use some plastic pipe to protect the cable how often should I cut the pipe then? 2. What less expensive options do I have trying to protect the underground cable?

I am also contemplating running in the same trench (at 8” depth though) an irrigation pipe.
3. Would this create any issue from an NECode stand point?

Thank you for help

You certainly can put that cable in conduit, problem is it will need to be pretty big, like 1-1/4 or 1-1/2 inch. If it were me I'd use 1-1/2" PVC Sch80.
6/2UF cable is quite large.

No problem from an electrical code standpoint to have the water above the electric.