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[Isaiah]

Im a little confused with motor overload sizing. If the motor controller has electronic overloads and the motor is 1Hp with SF of 1.15, does it size up 125% or 170%? Also if located outdoors does the OL have consider ambient compensation?


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[david luchini]

Im a little confused with motor overload sizing. If the motor controller has electronic overloads and the motor is 1Hp with SF of 1.15, does it size up 125% or 170%? Also if located outdoors does the OL have consider ambient compensation?


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Not greater than 140%

 

[tom baker]

Please check the instructions for the overload. Settings vary by OL mfg and service factor of motor.
I would put a label on the inside of the door with motor fla, sf, and overload setting

 

[tom baker]

And some Ols are ambient temp compensated.

 

[Isaiah]

And some Ols are ambient temp compensated.

I’ve since found out - these particular electronic OLs have ambient compensation “built-in” along with NEC requirements for both 1.0 and 1.15 Service Factors.


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