Area of Earthing conductor (mm2) When It is Same Material as Phase Conductor
Area of Earthing conductor (mm2) When It is Not Same Material as Phase Conductor
S < 16 mm2
S
SX(k1/k2)
16 mm2<S< 35 mm2
16 mm2
16X(k1/k2)
S > 35 mm2
S/2
SX(k1/2k2)
*K1 is value of Phase conductor,k2 is value of earthing conductor
*Value of K for GI=80, Alu=126,Cu=205 for 1 Sec
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