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30 HP at 480 (3 Phase) - 746 multiplied by 30 = 22380

22380 divided by 480 (3 Phase) = 46.5

46.5 divided by 1.73 = 29.5AMPS

Motor speed and efficiency may change the actual result. Always refer to the name plate data

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More answers

20 *746 = 14.920 k.W

i = 14.92 k.w / v * p.f * root(3)

=25.9 amp

25.9 * 150% = 38.85 AMP

<<>>

The above question can not be calculated because the voltage of the motor is not given. For code rule proposes a 20 HP motor at given voltages are, 200 volts = 62 amps, 230 volts = 54 amps, 460 volts = 27 amps and 575 volts = 22 amps. For wire sizing for motors always use the motors nameplate rating.

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13y ago
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40 Amps

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12y ago
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Q: How many amps does a 3 phase 20 hp motor use?
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