Question 5019 of 749 · Maryland Journeyperson Electrician Exam
A service has 4/0 AWG copper ungrounded conductors. What is the minimum copper GEC to the building steel electrode?
Exactly one answer is correct.
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Correct answer to question 5019
- C: 2 AWG
Explanation
Copper service conductors over 3/0 through 350 kcmil require at least a 2 AWG copper GEC under Table 250.66. 4/0 falls in that range.
More questions: Grounding and Bonding
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