calculating cable size

A little more info would help...

What voltage?...is the cable buried or on cable tray?...

i am assuming it is underground and the voltage is 3 phase 415 volts, current 24 amps,..

3 core X 10 sq mm will do the job.

Cheers.

Cheers

thank you very much, but similarly i have more motors with diffrent voltages, so pleae advise step by step what can i want to do

Hi,

In this case first should know that type of material, of which the cable will be made. Now we can calculate the size of the cable using following formula.

Now,

R = K * l/A

Hence,

A = K * l/R

Whwre,

K = Coeff. of conductance

l = length of the cable

R = Resistance

Regards,

J. P. Mishra.