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- Hi Kumar
HDPE offers better mechanical properties when compared to PVC. Its harder, better resistant to moisture ingress, termite / rodent resistant due to hardness. This is one good reason why more often HV/EHV cables are jacketed with HDPE.
In most cases to ensure the jacket isn't damaged after cable transportation and installation, HV / EHV cables shall be subjected to DC Voltage integrity test on jacket as per IEC 60229 recommendations. To enable this test, a conductive coating (eg. graphite) is applied on the jacket.
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