Question 13039 of 749 · Maryland Journeyperson Electrician Exam
A 240 volt single-phase circuit of 8 AWG copper (16,510 circular mils) runs 120 feet one way. What is the maximum load current that keeps voltage drop at 3 %?
Exactly one answer is correct.
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Show solution
Correct answer to question 13039
- C: 38.4 A
Explanation
Allowed drop is 7.2 V, and I = VD x CM / (2 x K x L) = 7.2 x 16,510 / (2 x 12.9 x 120) = 38.4 A. Omitting the 2 gives 76.8 A.
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