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Thermal Overload #90428
11/21/04 12:40 AM
11/21/04 12:40 AM
S
Sparky_1  Offline OP
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
Re: Thermal Overload #90429
11/21/04 10:03 AM
11/21/04 10:03 AM
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


Few things are harder to put up with than the annoyance of a good example.
Re: Thermal Overload #90430
11/21/04 10:51 AM
11/21/04 10:51 AM
S
Sparky_1  Offline OP
Member
Joined: Nov 2004
Posts: 14
Thanks for the information Tom


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