Why in Digital Megger for finding Insulation resistance,-ve is applied to core

Why in Digital Megger for finding Insulation resistance,-ve
is applied to core or conductor and +ve is applied to
ground.

Question Posted / karthi

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Why in Digital Megger for finding Insulation resistance,-ve is applied to core or conductor and +v..

Answer / ramesharavind s

in we throw the + wire in gnd when we find the how much
current flow in gnd wire and'll then as per ohm's law we
find the resistence of gnd.

so we always connect the +ve in gnd.

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