Question 10058 of 871 · Maryland Journeyperson Electrician Exam
A panelboard has a 225-ampere busbar and a 200-ampere main breaker. Using the 120 percent rule with the PV breaker at the opposite end, what is the largest permitted backfed PV breaker?
Exactly one answer is correct.
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Show solution
Correct answer to question 10058
- A: 70 amperes
Explanation
The allowance is 225 A x 1.2 = 270 A. Subtracting the 200 A main gives 270 A minus 200 A = 70 A. A 25 A answer results from ignoring the 120 percent factor.
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