My Mains trench had to be 36” minimum & used 3” grey schedule 80.
IRC code
As nobody sells schedule 80 fittings, schedule 40 fittings were used & passed inspection.
Seems dumb
I don’t know if there is a code for the phone lines, but if I had phone lines, I think that I would use the same trench for sure & place 1/2 way to surface.
|