Re: (ET) Electric motor search (off topic)

["David Roden" <etpost drmm net>]

On 2 Mar 2006 at 8:06, Konstanty, Walter (GE Indust, ConsInd) wrote:

> HP x 746 watts/HP x 1.15/110V = approx amps  (as motors are rated in HP 
> on
> Surplus Center)

As a rough rule of thumb, KW in == HP delivered, allowing for motor 
(in)efficiency.

Thus, if the motor is rated 1.5 HP, when it is delivering that power it 
will 
consume about 1.5kW from the power supply.  At 120 volts that is 1500 
Watts 
/ 120 volts = 12.5 amps.

That's about the practical limit for power from a 120 volt receptacle.  If 
you want or need more power, go to 240 volts.  A 20 amp, 240v circuit can 
deliver sustained power in the range of 3.8kW (== almost 4hp continuous).  

Also remember that ICEs are rated at peak HP, but motors are rated at 
continuous HP.

Hope this helps.  Good luck with the project.


David Roden - Akron, Ohio, USA

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