NEMA voltage ratings standard available

Rosslyn, Va.—The National Electrical Manufacturers Association (NEMA) has published ANSI C84.1 Electric Power Systems and Equipment – Voltage Ratings (60 Hertz).

This standard establishes nominal voltage ratings and operating tolerances for 60-hertz electric power systems above 100 volts.  It includes preferred voltage ratings up to and including 1200 kV maximum system voltage, as defined in the standard.

The contents and scope of C84.1-2011 may be viewed at

A hard or electronic copy may be purchased for $68 by visiting or by contacting IHS at 800-854-7179 (U.S. only) or 303-397-7956 (international).

For additional NEMA or other voltage rating information, click here to go to Utility Products' Buyers Guide.

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