Cables are very important why,because once they are installed under earth it is difficult to replace them if any fault occurs so maximum care should be taken for them.
Generally different cables are available based on their operating voltage levels and cores.like 3.3kv,6.6kv,11kv,33kv,66kv etc and single core and multi core.
DIFFERENT TESTS....
insulation resistance test should be done before hi-pot and after hi-pot.
single core cable at site before erection.
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