Answer / jk

Standard quation R=1/a and I=1/R

a=cross sectional area in Sq.mm
R=Resistance in ohms
I=Current in Ampere

now if we shorting above two euation in one form the the
formula become I=a means current is directly proportional
to the cross-sectional area of cable.inshort if cross-
sectional area increase then the current carrying capacity
is also increase of the cable.

Answer / ansar electrapower

sq mm means areaof crossection of the conductor
R prportional L/A
I=1/R
I=A/L


I= CURRENT
L= LENGTH OF THE CONDUCTOR
A= AREA OF CROSSECTION OF THE CONDUCTOR
SO AREA INCREASES ,CURRENT CARRYING CAPACITY ALSO INCREASES

Answer / chiplonkar

Current carrying capacity of a wire depends on the thermal
properties of the insulation applied over the conductor.
i.e. its temperature withstanding capacity decides the
current carrying capacity. For sending higher currents in a
wire,one must have lower resitance in order to limit the
Heat generated in the conductor.

Answer / s.vijayakumar

it is correct but this answer for dc current or AC current

Answer / subash.k

by thumb rule i can say 0.5sqmm conductor hav a current
carrying capacity of 6 amps.
but for 1sqmm its 14amps,6sqmm hav 42amps capacity.
like wise its vary

please forward me the type of questions which would rise while me attending to 33KV Electrical License to my mail ID:vadrevu_raghava@yahoo.co.in

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