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  1. NancyM

    NEMA rating standard is 460V but not 480V, why?

    Can someone explain why NEMA uses 460V as it's standard but not 480V? I am wondering why all motor specifications and catalogs list 460V but not the nominal 480V? If the nameplate data is for 460V, does that mean it will operate under the same conditions at 480V?
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