ANSI/NEMA AB 4:2009
Superseded
View Superseded by
Guidelines for Inspection and Preventive Maintenance of Molded Case Circuit Breakers Used in Commercial and Industrial Applications
Hardcopy , PDF
English
03-30-2011
02-23-2026
NEMA Standards Publication AB 4 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. Note—consult the manufacturer for DC-only or 400 Hz circuit breakers.
| DocumentType |
Standard
|
| Pages |
38
|
| PublisherName |
National Electrical Manufacturers Association
|
| Status |
Superseded
|
| SupersededBy | |
| Supersedes |
| NFPA 70B : 2006 | RECOMMENDED PRACTICE FOR ELECTRICAL EQUIPMENT MAINTENANCE |
| NFPA 70E : 2004 | ELECTRICAL SAFETY IN THE WORKPLACE |
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