ROSSLYN, Va.,—The National Electrical Manufacturers Association (NEMA) published NEMA AB 3 Molded Case Circuit Breakers and Their Application.
This application guide covers molded case circuit breakers and molded case switches, single-pole and multi-pole, fused and unfused, and their accessories. These circuit breakers and switches are assembled as integral units in supporting housings of insulating material and have rated voltages up to and including 1000 V, 50/60Hz, ac or ac/dc, and have rated interrupting current ratings of 5000 Amperes or more. Updates to this publication include the addition of Photovoltiac circuit breakers, National Electrical Code references, and diagrams.
NEMA AB 3 may be downloaded at no cost at www.nema.org/stds/ab3.cfm. A hard copy may be purchased for $92 by visiting global.ihs.com, or contacting IHS by phone at 800-854-7179 (U.S. only) or 303-397-7956 (international).
NEMA is the association of electrical equipment and medical imaging 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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