Question 4091 of 749 · Maryland Journeyperson Electrician Exam
When may a branch circuit overcurrent device be sized at 100 percent of the continuous load instead of 125 percent?
Exactly one answer is correct.
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Correct answer to question 4091
- A: When the assembly and device are listed for 100 percent operation
Explanation
The exception to 210.20(A) permits sizing at 100 percent of the continuous load where the assembly, including the overcurrent device, is listed for operation at 100 percent of its rating. Standard breakers are not listed that way.
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