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Data updated: 24 Feb 2026.
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Document ID:
NEMA-AB1
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Overview
Title:
Circuit Breakers, Molded-Case, Molded Case Switches, and Circuit-Breaker Enclosures (S/S by UL489)
Scope:
The Standards Publication covers single-pole and multipole air circuit breakers which are assembled as an integral unit in a supporting housing of insulating materials and which have a rated voltage up to and including 600 volts alternating current, 250 volts direct current, and a rated interrupting current of more than 1000 amperes.
Status:
Withdrawn
Withdrawal Date:
25-APR-2012
FSC/Area:
FACR
Doc Category:
National Electrical Manufacturers Association (NEMA)
Responsibilities
Lead Standardization Activity:
YD
Naval Facilities Engineering Command
Adopting Activity:
YD
Naval Facilities Engineering Command
Coordination:
Limited
Navy Custodian:
YD
Naval Facilities Engineering Command
Revision History
Click on column headings for a description of column content.
Media
Document Part Description
Dist Stmt
Document Date
Pages
Size
Notice - Withdrawal
A
25-APR-2012
1
1.8 KB
Notice - Adoption, Tier 2
A
09-SEP-2004
1
43.5 KB
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Defense Standardization Program
WARNING: UNAUTHORIZED ACCESS TO THIS UNITED STATES GOVERNMENT COMPUTER SYSTEM AND SOFTWARE IS PROHIBITED BY PUBLIC LAW 99-474 (THE COMPUTER FRAUD AND ABUSE ACT OF 1986) AND CAN RESULT IN ADMINISTRATIVE, DISCIPLINARY OR CRIMINAL PROCEEDINGS.