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#90428 - 11/20/04 09:40 PM Thermal Overload
Sparky_1 Offline

Registered: 11/20/04
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?


2014 / 2011 NEC & Related Books and Study Guides
#90429 - 11/21/04 07:03 AM Re: Thermal Overload
Tom Offline

Registered: 01/01/01
Posts: 1069
Loc: 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)

Few things are harder to put up with than the annoyance of a good example.

#90430 - 11/21/04 07:51 AM Re: Thermal Overload
Sparky_1 Offline

Registered: 11/20/04
Posts: 14
Thanks for the information Tom


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