ROSSLYN, Va.—Today, the National Electrical Manufacturers Association (NEMA) 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.
"This revision contains several edits to reflect new industry practices as well as harmonize the industry standards that apply to molded-case circuit breakers," said Patrick Salas, chair of the AB4 Task Group, and director, Codes & Standards GE Energy Connections, Industrial Solutions.
Molded-case circuit breakers have a very diverse use in several commercial and industrial applications. NEMA AB 4 is designed to guide qualified personnel during inspection and maintenance.
NEMA AB 4-2017 is available for $103 in hard copy and as an electronic download at no cost on the NEMA website.
The National Electrical Manufacturers Association (NEMA) represents 350 electrical and medical imaging manufacturers at the forefront of electrical safety, reliability, resilience, efficiency, and energy security. Our combined industries account for more than 400,000 American jobs and more than 7,000 facilities across the United States. Domestic production exceeds $114 billion per year and exports top $50 billion.