Question 10059 of 850 · Texas Journeyman Electrician Exam
When the 120 percent rule is used for a load-side interconnection, where must the backfed breaker be located?
Exactly one answer is correct.
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Correct answer to question 10059
- D: At the opposite end of the busbar from the main supply OCPD
Explanation
The 120 percent allowance requires the PV backfed breaker to be positioned at the end of the busbar opposite the primary supply. This prevents any part of the busbar from carrying more than its rating.
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