Question { BEL, 20517 }

On what basis no of earth pits are to be decided either for
transformers or for equipment?

Answer

There should be two distinct earth pit for TR neutral and
one for body earthing. This is as per IER. The earth
conductor crossection will depend upon the max fault
current that could flow in the system in case of a fault.
The thumb rule is, the crossecton of the earth conductor
should at least be half of one phase conductor.