Answer Posted / kalirajan.n

***SUPPOSE WE USE COPPER CONDUCTOR AND WE ALLOW A MAXIMUM OF
5V MAX. VOLTAGE DROP:

5= 2*12*15*230/CSA

CSA= 82800/5

CSA= 16560 CM

FROM COMMERCIAL REFERRENCES:

15560 CM IS CLOSEST TO 16510 CM WHICH IS #8 COPPER OR 8 SQMM
WIRE.

NOTE:

1. IN THIS CASE A MAXIMUM OF 5 VOLTS WAS CONSIDERED IN THE
CALCULATION.

2. THIS CALCULATION IS NOT VALID FOR LARGE MOTORS. BECAUSE
MOTORS DRAWS A MAXIMUM OF 7OO% TIMES ITS FULL LOAD TORQUE
DEPENDING ON THE MOTOR CONTROL STARTING METHODS USED BY THE
DESIGNING ENGINEER.

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