Submerged Cables
Submerged Cables
(OP)
I need to determine the best solution to replace failing class 1E safety-related 4160V feeder cables that are routed in buried conduit, which is full of water. I will need to consider the following options.
1. New alternate route above ground. Cost - approx 5M.
2. Use of inner conduit. Cost - approx 800K.
3. Use of armored cable. Cost - approx 800K.
Options 2 & 3 are the most viable and economical solutions.
Any suggestions for manufactures or OE. Thanks for your help.
1. New alternate route above ground. Cost - approx 5M.
2. Use of inner conduit. Cost - approx 800K.
3. Use of armored cable. Cost - approx 800K.
Options 2 & 3 are the most viable and economical solutions.
Any suggestions for manufactures or OE. Thanks for your help.






RE: Submerged Cables
This path -namely the manholes-it is almost always full of water. So what is it the problem? Corrosion?
You may seal the ducts if you could first to empty the water somehow.
But cable jacket [pvc, chlorosulphonated polyethylene [hypalon] and other has to be resistant to water penetration -even against sea water.
RE: Submerged Cables
Why not just replace with like cable? Is it the water that is concerning you?
David Castor
www.cvoes.com
RE: Submerged Cables
RE: Submerged Cables
RE: Submerged Cables
There should not be any issues using cable rated for underground conduit or direct bury service if it was not mechanically damaged during installation.
If you had cables fail in the underground conduit, are you sure the conduit is still mechanically sound (not collapsed or sheared), or that the cable didn't weld a slug onto the ID of the conduit when it failed?
All the major cable manufacturers offer equally reliable cable, if applied and installed correctly.
RE: Submerged Cables
You can look into standard submarine cable used for underwater applications. But it probably won't fit into your existing conduit. Why not just run a new cable outside along a wall?
David Castor
www.cvoes.com