Question 7032 of 749 · Maryland Journeyperson Electrician Exam
The old limit of 42 overcurrent devices for lighting and appliance branch-circuit panelboards was removed in the 2008 NEC. What limits the number of devices today?
Exactly one answer is correct.
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Correct answer to question 7032
- B: The number the panelboard is designed and listed for
Explanation
Since the 2008 NEC dropped the 42-circuit limit, 408.54 simply requires panelboards to prevent installing more overcurrent devices than the number for which they are designed, rated and listed. The manufacturer sets that number.
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