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NEMA Updates Guideline on Circuit Breakers

The National Electrical Manufacturers Association (NEMA) recently published a new version of NEMA AB 4-2017 Guidelines for Inspection and Preventive Maintenance of Molded-Case Circuit Breakers Used in Commercial and Industrial Applications. Molded-case circuit breakers have diverse uses in several commercial and industrial applications. NEMA AB 4 is designed to guide qualified personnel during inspection and maintenance. Click here for more information.