Question 2032 of 844 · Washington 01 Journey Level Electrician Exam
In a 120/240 volt single-phase dwelling service rated 200 A, the 2020 and 2023 NEC allow the service conductors to be sized at what percentage of the service rating?
Exactly one answer is correct.
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Correct answer to question 2032
- D: 83 percent
Explanation
Section 310.12 permits service and main feeder conductors for 120/240 volt dwelling services up to 400 A to have an ampacity of not less than 83 percent of the service rating. This replaced the former table method.
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