Question 13111 of 749 · Maryland Journeyperson Electrician Exam
A branch circuit supplies 30 A of continuous load and 20 A of noncontinuous load. What is the minimum standard overcurrent device rating?
Exactly one answer is correct.
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Correct answer to question 13111
- C: 60 A
Explanation
The minimum is 125 % of the continuous load plus 100 % of the noncontinuous load: 30 x 1.25 + 20 = 57.5 A, so the next standard size is 60 A. Applying 125 % to the whole 50 A gives 62.5 A, which is not a standard size and leads to 70 A.
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