Question 13059 of 844 · Washington 01 Journey Level Electrician Exam
A 50 A noncontinuous load is supplied by one of six current-carrying THHN copper conductors in a raceway at 30 °C. Terminations are rated 75 °C. What is the smallest conductor size permitted?
Exactly one answer is correct.
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Correct answer to question 13059
- C: 6 AWG
Explanation
8 AWG derates to 55 x 0.80 = 44 A, which is below 50 A. 6 AWG derates to 75 x 0.80 = 60 A and its 75 °C rating of 65 A also covers the 50 A load, so 6 AWG is the minimum.
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