ANSI/NEMA AB 4-2009

Sets forth, for use by qualified personnel, a number of basic procedures that may be used for the inspection and preventive maintenance of molded-case circuit breakers used in industrial and commercial applications rated up to and including 1000 V 50/60 Hz ac or ac/dc.

This product references:NFPA (Fire) 70E - Standard for Electrical Safety in the Workplace, 2009 Edition
NFPA (Fire) 70 - National Electrical Code, 2008 Edition
NFPA (Fire) 70B - Recommended Practice for Electrical Equipment Maintenance, 2006 Edition
NEMA AB 3-2006 - Molded-Case Circuit Breakers and Their Application
NEMA 250-2008 - Enclosures for Electrical Equipment (1000 Volts Maximum)
UL 489 - Molded-Case Circuit Breakers, Molded-Case Switches and Circuit-Breaker Enclosures
UL 1053 - Ground-Fault Sensing and Relaying Equipment
This product is related to: ANSI/NEMA KS 3-2010 - Guidelines for Inspection and Preventive Maintenance of Molded-Case Circuit Breakers Used in Commercial and Industrial Applications
This product referenced by:NEMA BU 1.1-2010 - Guidelines for Inspection and Preventive Maintenance of Molded-Case Circuit Breakers Used in Commercial and Industrial Applications
This product replaces:NEMA AB 4-2003 - Guidelines for Inspection and Preventive Maintenance of Molded-Case Circuit Breakers Used in Commercial and Industrial Applications