Answer / rvg

For calculating cable size,for a specific load current,
following facts to be considered:

1.Maximum load current.
2.under ground or overhead laying
3.max. temperature withstanding capability of cable insulation.
4.max. voltage stress withstanding capability of cable
insulation.
5. distance of load from the power supply
6. AC/DC supply and frequency .

Answer / satya dev ( knight frank)

In that question, the follwing factors are not mentioned

for what current load u are selecting the cable size---??
for what the calbe length using for system---????
for what type of load has to be conneted--/?????



If above factor are availabe then we can claculate the
same. there is no exact formula to calculate the size of
cable without all above factors

Answer / praveen

here i think the question is asked considering the same
current is flowed by the wires.
we should consider the fact that in
aluminium the tensile strength is more. conductivity is
less but cost is also less.
so the span of aluminium is high. also the conductor size
is more. but even in that case the overall cost is less for
aluminium.

Answer / santhoshkumar

based load current

Answer / sabuj

GENERALYY ALUMINIUM cABLE CAN CARRY 2 TIMES OF RATED SQMM.
COPPER CABLE CAN CARRY APPROXIMATELY 4 TIMES OF RATED SQMM.

Answer / sulthanl

By the screw guage

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