how to calculate no. of earthing pits and their diamensions? no. of lightn

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Question

how to calculate no. of earthing pits and their diamensions?
no. of lightning arrester rods which are required to 
protect a building of 35 mtr and we calculate?

Question Submitted By :: Verma Dilip

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Answer Posted By

Re: how to calculate no. of earthing pits and their diamensions? no. of lightning arrester rods which are required to protect a building of 35 mtr and we calculate?

Answer
# 1

Normally the area which is covered by a lighting arrester 
calculated on the basis of PYTHAGAROUS statement.

In a right angled triangle, the sum of sqr.root of the 
adjacent and opposite sides is equal to the sqr root of the 
third side.

In the question asked the height is 35 meters. based on the 
above we have to calculate the required datas.

Is This Answer Correct ?

1 Yes

4 No

Ramasubramanian.ganesan

Re: how to calculate no. of earthing pits and their diamensions? no. of lightning arrester rods which are required to protect a building of 35 mtr and we calculate?

Answer
# 2

to determine the no.of earthing pits required is depends 
uponn the area required to dissipate the fault courrent to 
the area of pipe electrode. 
To protect 35M building , 1no. of lightning arrestor is 
sufficient however better to provide two nos.of down 
conductors hence to protect the building if any one 
conductor fails.

Is This Answer Correct ?

2 Yes

0 No

Mahamuni Raja

Question	Asked @	Answers
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