Thousands of feet of 9/12/16 5-6" steel reinforced ductbanks between manholes. All lead covered. The old banks were progessively failing due to the road traffic, cables short out and can't even be pulled out as the conduits were no longer passable.
EB Duct is a non-metallic conduit made expressly for concrete Encased ductbanks. There is a similar product used for direct burial. I think EB stands for Encased Burial, and DB stands for Direct Burial
My understanding (and I could be wrong) was that EB is good for telephone and communications wiring, but not listed or approved for electrical power conductors.
