Question 5022 of 749 · Maryland Journeyperson Electrician Exam
A service has three parallel sets of 400 kcmil copper per phase. What is the minimum copper GEC to building steel?
Exactly one answer is correct.
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Correct answer to question 5022
- B: 3/0 AWG
Explanation
The equivalent area is 3 x 400 = 1200 kcmil, which exceeds 1100 kcmil. Table 250.66 requires a 3/0 copper GEC for copper service conductors over 1100 kcmil.
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