Question 5032 of 790 · California General Electrician Exam
A service has four parallel sets of 500 kcmil copper per phase (2000 kcmil total). What is the minimum copper main bonding jumper?
Exactly one answer is correct.
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Correct answer to question 5032
- D: 250 kcmil
Explanation
Above 1100 kcmil copper, the main bonding jumper must have an area of at least 12.5 percent of the largest ungrounded conductor set. 2000 x 0.125 = 250 kcmil. See 250.28(D) and Table 250.102(C)(1).
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