BUS BAR...

Bus bar is a electrical conductor where voltage should be maintained constant and current density will changed according to load tapping.In feeder the voltage will change and current will remain constant as no intermediate tapping is there.
                   
DIFFERENT TESTS...

                               insulation resistance test should be done before hi-pot and after hi-pot.

all aluminium conductor

aluminium conductor steel re-in-forced conductor

aluminium pipe conductor

1.INSULATION RESISTANCE TEST....

2.HI-POTENTIAL TEST....