What Is the Correct Current Draw Calculation for a 2Hp 208V 3-Phase Motor?

[Matt1234]

hi there,
Looking for some info, on how i would find the current draw of a 2 Hp motor running at 208v 3 phase with a unity power factor and efficenty of 100%. I can't seem to put it together today and cannot get ahold of a TA, basically i need to size wires/fuses in a schematic for this current draw and completely forgot how to do this. I keep getting 862 A which i know is way too high. I know 2 hp = 1492 watts. Can someone please help me with the mathematic breakdown? Would be appreciated.


i think I am losing it been a real bad week for me.
I think can use this:

P(watts) = I(Amps) * v(volts)

1492 = I * 208
I = 7.17 A per phase?

Is this correct?


Thanks,
Matt.

 

[Matt1234]

Anyone?

 

[Redbelly98]

This is not my field of expertise, but I am wondering if the 1492 W is the total power, and should be divided up among the 3 phases before doing the "P=IV" calculation?

 

[dlgoff]

Your calculation is correct for a single phase motor. For three phase you need to divied by 1.73 (square root of 3).