Underground 13.8KV Duct Bank
Underground 13.8KV Duct Bank
(OP)
I work in an industrial facility where all of our 13.8KV incoming feeders are routed in duct banks with large concrete manholes for pulling and splicing feeder taps. These manholes are spaced at approx. 600' intervals. I am working to add two new incoming feeders. We have not added any duct bank since I started working here, so I don't have any experience. Are there more economical solutions than the concrete manholes? I have had one contractor mention fiberglass manholes, but I don't know anything about this option. Any ideas would be greatly appreciated.






RE: Underground 13.8KV Duct Bank
RE: Underground 13.8KV Duct Bank
If you're thinking fiberglass or some other material, don't overlook the very real issue of manholes floating up out of the ground when the water gets high. If you have a high water table, this can (and has) happened, even with concrete. I'd get a consult from your local geotech or civil engineer.