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NEMA ANSI C84.1:2006

Electric power systems and equipment - voltage ratings (60 hertz)

Establishes nominal voltage ratings and operating tolerances for 60 Hz electric power systems above 100 V. Makes recommendations to other standardizing groups with respect to voltage ratings for equipment used on power systems and for utilization devices connected to such systems. Includes preferred voltage ratings up to and including 1200 kV maximum system voltage, as defined in the standard.

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NEMA: National Electrical Manufacturers Association [nema]

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