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#90428 - 11/21/04 01:40 AM Thermal Overload  
Sparky_1  Offline
Member
Joined: Nov 2004
Posts: 14
We have 3 3 phase 3 HP fan motors that are
continuous duty.
Can we use cord and plug and the breaker
to operate the motors? or do we have to
use a overload section on each motor?

Thanks,
Sparky_1


2017 / 2014 NEC & Related Books and Study Guides

#90429 - 11/21/04 11:03 AM Re: Thermal Overload  
Tom  Offline
Member
Joined: Jan 2001
Posts: 1,044
Shinnston, WV USA
Most 3 phase motors do not have built in overload protection. You have to install an overload device in each conductor & this is usually done with a motor starter. See 430.32

As for using the cord & plug connection, that will require a horsepower rated receptacle and a horsepower rated cord cap.430.109(F)

Tom


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#90430 - 11/21/04 11:51 AM Re: Thermal Overload  
Sparky_1  Offline
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Joined: Nov 2004
Posts: 14
Thanks for the information Tom



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