Question 6060 of 871 · Maryland Journeyperson Electrician Exam
Under NEC 2020 and 2023, what is the minimum size conductor generally permitted for branch circuit wiring in copper?
Exactly one answer is correct.
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Correct answer to question 6060
- D: 14 AWG
Explanation
The general minimum conductor size is 14 AWG copper and 12 AWG aluminum or copper-clad aluminum, with exceptions for items like fixture wire and control circuits. In NEC 2023 this is 310.3(A), and the 2020 edition carries the same rule in Article 310. NEC 2026 lowered the copper minimum, which is why this question is limited to 2020 and 2023.
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