Question 13083 of 749 · Maryland Journeyperson Electrician Exam
A 25 hp, 460 volt, three-phase induction motor has a table full-load current of 34 A. What is the minimum ampacity of its branch-circuit conductors?
Exactly one answer is correct.
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Correct answer to question 13083
- C: 42.5 A
Explanation
Conductors for a single motor must have an ampacity of at least 125 % of the table full-load current: 34 x 1.25 = 42.5 A. Using 140 % (47.6 A) confuses this with overload limits.
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