Answer / deep

to dry the surface and earthing purpose.

Answer / abhishek goyal

It reduce the dryness of surface inside soil so earthing
will be less than 1ohm. It will also good for insulation at
transformer yard, if some one work on it during the raining
season.

Answer / ramiz raza

to reduce the step potential and touch potential.....in short for protection against shock...

Answer / srinivas

The main purpose is easy to findout oil leaks in transformer and avoid useless plants on the surroundings and also increase the dryness in rainey season.

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