The length of the wire supplying current to the consumer is 30m. What cross-section should

The length of the wire supplying current to the consumer is 30m. What cross-section should the copper wire have if, with a current of 160 A, the voltage at its ends is 8V.

To find out the required cross-section of the presented copper wire, consider the equality: ρCu * l / S = R (resistance) = U / I, from where we express: S = I * ρCu * l / U.

Const: ρCu – beats. electrical resistance of copper (assumed ρCu = 0.017 Ohm * mm2 / m).

Data: I – current (I = 160 A); U – voltage at the ends (U = 8 V); l – wire length (l = 30 m).

Calculation: S = I * ρCu * l / U = 160 * 0.017 * 30/8 = 10.2 mm2.

Answer: The presented copper wire must have a cross section of 10.2 mm2.