for the safety of the equipment
for the safety of the operating personnel
for the safety of the equipment and for the safety of the operating personnel
none of the above
grounding resistance should be as low as possible
grounding resistance should be as high as possible
grounding resistance should be always zero
to provide low impedance
to discharge the charging capacitance to ground
protection for operating personnel
both 1) to discharge the charging capacitance to ground and 2) protection for operating personnel
voltage potential at the earth mat increases due to earthing
voltage potential at the earth mat decreases due to earthing
voltage potential at the earth mat remains zero irrespective of fault
to provide as low resistance possible to the ground
to provide as high resistance possible to the ground
to provide flow of positive, negative and zero sequence currents