NEC Table 430.250
NEC Table 430.250
(OP)
Is there a formula for calculting amperes based on HP for the NEC Table 430.250? The table only goes to 500 HP and I have a 520 HP motor @ 575 VAC.
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RE: NEC Table 430.250
For a particular motor, you should be able to get the full load amperes from the motor nameplate or motor supplier. Generally assuming 1 kVA per horsepower will be conservative. However, a 520 hp motor sounds somewhat non-standard, so you should try to get full load amp data from the manufacturer. Especially if it is submersible, hermetic, or unusually low rpm.
RE: NEC Table 430.250
Bill
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