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Tool Talk Discussion Board

Re: O/T What size generator to run 1 1/2hp. electric motor


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Posted by Texasmark1 on February 11, 2012 at 08:15:01 from (67.142.164.24):

In Reply to: Re: O/T What size generator to run 1 1/2hp. electric motor posted by Duane(Pa) on February 10, 2012 at 17:42:37:

On go with a gas engine, sounds like a plan to me. I agree with BD or whomever said that motors of today are hp rated right at stall torque....just before the curves start to fall off.

There ought to be a law against it but so far there isn't and what we have to do as consumers is read the running full load watts if you want to know what it really can do. 1 hp is 741 watts (at a power factor of 1...which you don't get with a motor) as I remember so for a 120v 1 hp motor it should produce it's hp at about 1.15% (internal losses and some PF adjustment) of that or just over 7 amperes.

Mark


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