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To find the efficiency of your motor you put it to a power factor meter. A one horse water pump is rated at 1900 watts and has a surge wattage of 5700 watts.The difference in watts is the reactive energy that the motor draws just to create a EMF, Which only takes a second, Then the reactive energy is expelled back into the line to dissipate in heat in the wires and the motor. This heat shortens the life of the motor. This process is repeated every the motor cycles on. To make the motor as efficient as possible it should be sized to handle the load and cycle as little as possible to avoid the reactive energy. Most homes average a power factor of .75 or less out of a possible 1.0 PF. Which means that out of every dollor spent on electric only 75% is being utililized effectivly. If you corrected your power factor to .98 or.99 your electric bill would fall about 30%.
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