Question 4111 of 938 · Maryland Journeyperson Electrician Exam
A building has both 480Y/277-volt and 208Y/120-volt branch circuits. What is required for the ungrounded branch circuit conductors?
Exactly one answer is correct.
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Correct answer to question 4111
- C: Identification by phase or line and system at termination points
Explanation
210.5(C)(1) requires ungrounded conductors to be identified by phase or line and system at all termination, connection and splice points where more than one nominal voltage system supplies the premises. The identification method must be posted at each branch-circuit panelboard or otherwise documented in a readily available manner.
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