ROSSLYN, Va.,—The National Electrical Manufacturers Association (NEMA) has published ANSI C84.1Electric 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 www.nema.org/stds/c84-1.cfm. A hard or electronic copy may be purchased for $68 by visiting global.ihs.com or by contacting IHS at 800-854-7179 (U.S. only) or 303-397-7956 (international).
NEMA is the association of electrical equipment manufacturers, founded in 1926 and headquartered in Arlington, Virginia. Its member companies manufacture a diverse set of products including power transmission and distribution equipment, lighting systems, factory automation and control systems, and medical diagnostic imaging systems. Worldwide annual sales of NEMA-scope products exceed $120 billion.
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