What must be the minimum size of a GI earth electrode to be used to earth a 15-hp motor?
1
90 cm × 60 cm × 6 mm
2
60 cm × 60 cm × 6 mm
3
60 cm × 60 cm × 3 mm
4
60 cm × 90 cm × 3 mm
What must be the minimum size of a GI earth electrode to be used to earth a 15-hp motor?