Question 10081 of 938 · Maryland Journeyperson Electrician Exam
A fire pump motor has a full-load current of 40 amperes and no accessory loads. What is the minimum ampacity of the supply conductors?
Exactly one answer is correct.
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Correct answer to question 10081
- A: 50 amperes
Explanation
Fire pump supply conductors must have an ampacity of not less than 125 percent of the motor FLC plus 100 percent of accessory loads: 40 A x 1.25 = 50 A. The OCPD is sized separately, based on locked-rotor current.
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