Question 13086 of 731 · Texas Journeyman Electrician Exam
A 20 hp, 460 volt, three-phase motor has a nameplate current of 26 A. Table 430.250 lists 27 A. What is the minimum branch-circuit conductor ampacity?
Exactly one answer is correct.
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Correct answer to question 13086
- B: 33.75 A
Explanation
Conductor sizing uses the table full-load current, not the nameplate value: 27 x 1.25 = 33.75 A. Using the nameplate gives 32.5 A, which is the most common error.
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