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

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