Question 2021 of 731 · Texas Journeyman Electrician Exam
A commercial service supplies 120 A of continuous load and 40 A of noncontinuous load. What is the minimum ampacity of the service-entrance conductors?
Exactly one answer is correct.
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Correct answer to question 2021
- C: 190 A
Explanation
Service-entrance conductors must carry 125 percent of the continuous load plus 100 percent of the noncontinuous load. 120 A times 1.25 is 150 A, plus 40 A gives 190 A. See 230.42(A).
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