Question 3019 of 731 · Texas Journeyman Electrician Exam
What must the interrupting rating of a circuit breaker be at least equal to?
Exactly one answer is correct.
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Correct answer to question 3019
- C: The current available at its line terminals at the nominal circuit voltage
Explanation
Equipment intended to interrupt current at fault levels must have an interrupting rating at nominal voltage at least equal to the current available at the line terminals. See 110.9.
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