Question 7036 of 749 · Maryland Journeyperson Electrician Exam
In a panelboard supplied by a 4-wire delta system with a high leg, which phase position must the high leg occupy?
Exactly one answer is correct.
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Correct answer to question 7036
- C: The B phase
Explanation
Section 408.3(E)(1) requires the phase with the higher voltage to ground on a 4-wire delta system to be the B phase in panelboards and switchboards. The high leg must also be identified, normally by orange marking.
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