NM CID EL-1 Practice Questions - New Mexico CID EL-1 Electrical Distribution Systems, Including Transmission Lines Examination Exam

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A 480 V three-phase feeder uses 4/0 AWG aluminum (211,600 circular mils). The load is 200 A and the one-way length is 200 feet. Using VD = 1.732 × K × I × D / CM with K = 21.2 for aluminum, what is the approximate line-to-line voltage drop?

2.3 V 6.9 V 13.8 V 27.6 V

Correct Answer:

6.9 V

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