Question 13018 of 731 · Texas Journeyman Electrician Exam
A 120/240 volt single-phase 3-wire feeder carries 40 A on one ungrounded conductor and 25 A on the other. Assuming linear loads, what current flows in the neutral?
Exactly one answer is correct.
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Correct answer to question 13018
- B: 15 A
Explanation
On a 120/240 V 3-wire system the neutral carries only the unbalanced current: 40 A minus 25 A = 15 A. Adding the currents (65 A) is the typical mistake.
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