Answer Posted / guest

N=3L(L-1)+1 Where N=No of strand L=No of layer of cable. ie A single layer(single strand) N=3*1(1-1)+1=1 A double layer cable N=3*2(2-1)+1=7 And in three layer cable N=3*3(3-1)+1=19 And . so on ........ But Now-a-days some manufacuture company does not supply the exact size (No of strand) of cable for economic benefit.

diff b/w normal grounding and resistance grounding

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1)we have 1000 cfm Blower,Dia-1Mtr,Velocity of air 94 m/s 2)We have Natural Air velocity 94m/s 3If i Put Wind Mill in natural air ,speed is 94m/s Then it will generate Assume 100kw 4)If i put same wind mill across the Blower,air speed is same 94m/s now the Question is Will it generate 100 kw?

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