Question 8059 of 871 · Maryland Journeyperson Electrician Exam
An optional standby system uses an automatic transfer switch and no load management. What capacity must the system have?
Exactly one answer is correct.
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Correct answer to question 8059
- D: Enough to supply the full load that is transferred
Explanation
Optional standby systems with automatic transfer and no load management must be sized for the full load that can be transferred. This is 702.4(B)(2) in NEC 2020 and 702.4(A)(2) in NEC 2023 and 2026. An energy management system that automatically limits the load can reduce the required capacity, while with manual transfer the user chooses which loads to connect.
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