Correct Conductor Size

[rharris]

I have an application that will use a single motor that is rated for continuous duty but will be run intermittingly. Should the conductors be sized per NEC Article 430.22 (A), motor FLA X 125% or use NEC Table 430.22(E) Duty Cycle Service, that states that a continuous rated motor for intermittent duty the conductors shall be sized at motor FLA X 140%?

 

[augie47]

Welcome to the Forum.
Take into account, all we have is opinions
I would say the 140%.
It seems to fall ideally into the table as "Continuous Duty Motor" operated in "intermediate duty cycle"

 

[raider1]

Welcome to the forum.

I agree with Gus,

If you are using a continious duty rated motor is an intermittent duty situation, the branch circuit conductor should be sized in accordance with Table 430.22(E) and be 140% of the motor nameplate current rating.

Chris

 

[rharris]

Thanks guys. I would also agree to use the 140%. It seems like the most logical choice for this application.

 

[raider1]

Your very welcome.

Chris