tion 4 (20 marks) a) State two b) Consider a large s why proper ng of a ation ha

Question

tion 4 (20 marks) a) State two b) Consider a large s why proper ng of a ation having a layer of rock, 150 mm thick at the surface, having a resistivity of 3000 ?m and the soil resist Given Cs for a rock surface of 150mm-0.7. Assume body Determine: ivity of 150 Qm. resistance R.-1000 2 Reflection factor (2 marks) Ground resistance between two feet in series (2 marks) stance between two feet in series (2marks) amu ijiGround resistance between two feet in parallel (2 marks) y Total touch resistance (2 marks)6) Total step resistance (2 marks) Leakage current through the two feet plant area is 267 V (2 marks) f safe touch voltage in the power Determine the resistance to ground for a 800 mm x 800 mm plate grounding, considering a sandy soil, treated artificially and having attained an average soil resistivity of 10 2m 2 marks) 3 of 4

Explanation / Answer

a)

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