Stones are provided in the substation to:
- Reduce step potential
- Reduce touch potential
- Stop the growth of weeds and grass
- All of these
- None of these
Correct answer: 4. All of these
Explanation: Rather of grass or cemented ground the electrical substations use stones. Stones in substations are provided so as to:
- Reduce step potential: The potential that is developed between two feet on the ground in case of short circuit
- The potential between feet and body of power equipment when a person touches it
- Growth of grass and weeds increases moisture and can damage the equipment. Stones stop the growth of weeds and grass inside the substation.