On Thu, 10 Feb 2011 11:09:37 -0500, "Joe AutoDrill"
wrote:

"Jon Danniken" wrote in message
...
If an electric motor with 80% efficiency is pulling 16A at 120V, what is
the horsepower?

Going by (16)(120)(0.8)/746, I get about 2 HP.

Is this right?

I also mostly agree based on a chart I have here.

2 HP AO smith 120V motor pulls:
16.4 to 16.6 at 3600 RPM
17 to 17.8 for 1800 RPM

That must be a capacitor start/capacitor run motor, not a more typical
cap start. The run capacitor improves the power factor, lowering the
line current.

--
Ned Simmons