Question 8017 of 749 · Maryland Journeyperson Electrician Exam
A motor has a table full-load current of 22 A. Dual-element fuses are used for branch-circuit short-circuit protection. What is the maximum standard fuse size, applying the next higher size rule?
Exactly one answer is correct.
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Correct answer to question 8017
- B: 40 A
Explanation
Table 430.52 allows 175 percent for dual-element fuses. 22 A times 1.75 equals 38.5 A, which is not a standard size, so the next higher standard size of 40 A is permitted.
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