Answer Posted / prodip das

1. we have to select cable
for that first calculate current=12X1000/1.73x400x.95
=19 Amps

Type of cables= single core NYY(Red/Yellow/Blue/Green)
Cable size3x1CNYY
NYY 2.5 sq.mm
(ccc)=19.61A
Group rating=.68
sand bed=.90
Rating factor=.68x.90=.61
Actual CCC OF 2.5SQ.MM CABLE
=19.6X.61=11.96A
=26.20x.61=15.98
=33.63x.61=20.5143(OK)6 sq.mm

Votlage drop as per IEE regulation
Distance=10m(more)
=5.9x10x.152=8.968V(ok)
Finally SWG=6sq.mm

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