Gang, I have an application for a 50-meter 460 V cable run subgrade in ASSHTO class heavy grade precast concrete culvert with cast metal grate. The area is subject to periodic storm flooding to about 5 feet over grade. Many of the US cable manufacturers are telling me that their standard above-grade products, such as DLO, Exane, Type P, etc can perform underwater, despite there being no subsea rating. One manufacturer who makes subsea MV cable indicates they can also modify their run without problem and make their low voltage product, water-tight. Can anyone recommend an LV subsea cable?
A side question, is there any reason I'm missing why I can't run an MV subsea cable for LV service?
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