no all electricial equiptment has to be listed and labeled for its use. Plumbing pipe is not listed for electrical work.
Why do you think you need schedule 80 for this application?
The fittings for schedule 80 and schedule 40 pvc piping are the same.
What you need is a 2" TA fitting and a 2" box adapter for your application.
The TA requires a lock ring and a bushing the Box adapter glues into the TA.
Or there is the offset fitting. All of these are from carlon