A technician is sizing the branch circuit conductors for a single 25 HP, 460V, 3-phase motor with a table FLC of 34A. What is the minimum ampacity required for these conductors?
Answers
A34A
B42.5A
C40A
D85A
Correct answer: B — 42.5A
NEC requires branch circuit conductors for a single continuous duty motor to be sized at 125% of the motor full-load current rating (FLC). 34A * 1.25 = 42.5A.
MIFOTRA exam practicealigned to NFPA 70 / IEC 60364·3 marks·Medium