-The accompanying figure shows a motor operating from a 220-volt DC source and drawing 75 amperes at full load. If a 3 percent drop in line voltage is permitted, find the smallest size of conductor to use in a line 100 feet in length. Express your answer in circular mils. (Note: K=12.9 ohms/mil-foot)

Question

Quizplus · Accepted Answer

The Answer is Vd = 0.3 * 220 Volts = 6.6 Volts
CM = KIL/Vd
CM = [(12.9 ohms/mil-foot)*(75 amperes)*(200 feet)]/6.6 Volts = 28043.48 circular mils

-The Accompanying Figure Shows a Motor Operating from a 220-Volt