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To find the amperage when HP is shown, this formula is used; I = HP x 746/1.73 x E x %eff x pf.

A standard motor's efficiency between 5 to 100 HP is .84 to .91.
A standard motor's power factor between 10 to 100 HP is .86 to .92.

Amps = 3 x 746 = 2238/1.73 x volts x .84 x .84.

As you can see we can go no further as no voltage

was stated.

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Corbin Jast

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2y ago

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