NEC 430.22

[rgeorge3]

When designing conductors for a single motor, when do you use the multiplier shown in Table 430.22(E) in lieu of the 125 percent. Most of my applications involve pumps. It also appears that we would use 140 percent factor based upon "nameplate" FLC in lieu of the FLC shown in Table 430.250. How does this impact other components such as controllers, OCPD, etc.
Thanks for the clarification.:?

 

[Julius Right]

In my opinion, art.430.22 (E) states the ampacity of conductor has to be as per Table 430.22(E) and then the circuit breaker has to be as per
IV. Motor Branch-Circuit Short-Circuit and Ground-Fault Protection
art.430.52 Rating or Setting for Individual Motor Circuit.
Then, an auxiliary overload protection to meet the conductor ampacity shall be provided as per art.430.32 Continuous-Duty Motors.