NEMA AB 4-2017 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 1,000 V 50/60 Hz ac or ac/dc.





NEMA AB 4-2017
Original price was: $153.00.$76.00Current price is: $76.00.
Guidelines for Inspection and Preventive Maintenance of Molded Case Circuit Breakers Used in Commercial and Industrial Applications
National Electrical Manufacturers Association , 08/01/2017