Question 5060 of 844 · Washington 01 Journey Level Electrician Exam
High-impedance grounded neutral systems are permitted for 3-phase AC systems of 480 V to 1000 V where
Exactly one answer is correct.
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Correct answer to question 5060
- D: Qualified persons service it and no line-to-neutral loads exist
Explanation
These systems are allowed where conditions of maintenance ensure only qualified persons service the installation, continuity of power is required, ground detectors are installed, and no line-to-neutral loads are served. See 250.36.
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