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Anonymous Poster

Full-Load Motor Amperage vs. Unloaded

06/24/2008 12:36 PM

If I have a full load amperage on the nametag of the motor is there a rule of thumb what it would be running with no load? I have a single phase motor with a full load amperage of 8 amps. What would be the reading for a high and low with no load.
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JRaef
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#1

Re: Full load motor amperage verses unloaded

06/24/2008 1:28 PM

No way to know for sure, it can range from 20 - 40% of FLA depending on the motor design. Uncouple the motor and test it, that is the best way to be sure.

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nesubra
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Re: Full-Load Motor Amperage vs. Unloaded

06/26/2008 3:14 AM

If its 2 pole machine no load current is within 20-25% ,4P30%.so u can measuere no load current and arrive at the fig

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