Quote Originally Posted by jdurand View Post
They take the Watts drawn by the motor and divide by 746 to get INPUT hp. USA motors are rated on OUTPUT hp.
Thanks, I didn't even know this was a (Chinese or other) practice -
AFAIK the wattage rating should be for continous duty (unless some other % DF is specified),
and HP/ kW output for on axle/ effective work. In the US and elsewhere.
Hence the efficiency of a motor will be "Input" divided by "Output" - averaging 90-95 %, right?