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DC Hi-Pot Testing is used for proof testing shielded cables (5kV to 46kV) in the field. The test can be done at various times such as acceptance of new cable installation, maintenance testing to track insulation degradation and as a pre and post test for splicing existing cables to new ones. The test will expose gross imperfections that are caused by improper handling, installation techniques or termination workmanship. A DC Hi-Pot test is not capable of locating the point of failure, rather it gives you an assessment of the whole system.

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Background Southwire’s Medium Voltage Switchgear and Substation Cable is a non-shielded, insulated, finely stranded cable that has no voltage rating. The cable has no UL listing and is not recognized by the National Electrical Code (NEC). The cable’s primarily use is for installation in medium voltage switchgear, motor controllers, and substations. In regard to use inside enclosures and equipment, even though this cable itself is not UL listed, a UL approval can be obtained on the complete assembly by having the system tested and approved.

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