Photo by Alexey Pishchur, via Wikimedia Commons
Ecmweb 15300 Azbuka Mccb
Ecmweb 15300 Azbuka Mccb
Ecmweb 15300 Azbuka Mccb
Ecmweb 15300 Azbuka Mccb
Ecmweb 15300 Azbuka Mccb

NEMA Updates Molded-Case Circuit Breaker Standard

Aug. 9, 2017
Document to guide qualified personnel during inspection and maintenance

The National Electrical Manufacturers Association 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

"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.

Voice your opinion!

To join the conversation, and become an exclusive member of EC&M, create an account today!

Sponsored Recommendations

Electrical Conduit Comparison Chart

CHAMPION FIBERGLASS electrical conduit is a lightweight, durable option that provides lasting savings when compared to other materials. Compare electrical conduit types including...

Don't Let Burn-Through Threaten Another Data Center or Utility Project

Get the No Burn-Through Elbow eGuide to learn many reasons why Champion Fiberglass elbows will enhance your data center and utility projects today.

Considerations for Direct Burial Conduit

Installation type plays a key role in the type of conduit selected for electrical systems in industrial construction projects. Above ground, below ground, direct buried, encased...

How to Calculate Labor Costs

Most important to accurately estimating labor costs is knowing the approximate hours required for project completion. Learn how to calculate electrical labor cost.