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NEMA AB 1

Withdrawn
Withdrawn

A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.

Molded-Case Circuit Breakers, Molded Case Switches, and Circuit-Breaker Enclosures
Withdrawn date

07-23-2013

Published date

10-27-2004

Scope
Purpose
1 References, definitions, abbreviations and symbols
      References
      Definitions
      Abbreviations and symbols
2 General
      Characteristics of molded case circuit breakers
      and molded case switches
3 Construction requirements
      General
      Corrosion protection
      Operating mechanism
      Spacings
      Wire connectors
4 Performance requirements and verification tests
      General
      Standard design verification tests
      Rated short-circuit current tests
5 Periodic verification tests
6 Field tests
7 Specific application circuit breakers
      General
      Instantaneous trip circuit breakers
      Integrally fused circuit breakers
      Current limiting circuit breakers
      Marine circuit breakers
      Mining circuit breakers
      Molded case switches
      Electronic trip unit circuit breakers
      Switching duty circuit breakers
      Circuit breakers having a short-time withstand
        current rating
8 Accessories
      General
      General requirements
      Shunt-trip release
      Undervoltage trip release
      Auxiliary and alarm switches
      Electrical operator
      Fuse accessory package
      Mechanical interlock
      Handle lock
9 Circuit breaker and molded case switch enclosures
      Enclosures for general use
      Test enclosures
10 Marking requirements
      Circuit breaker marking(s)
      Molded case switch marking(s)
      Accessory marking(s)
      Marking of enclosures
      Marking information
11 Determination of short-circuit current, power
    factor, and recovery voltage
      Instrumentation
      Circuit conditions
      Alternating current circuits of 10,000 Amperes or
        less
      Alternating current circuits of greater than
        10,000 Amperes
      Recovery voltage
      Direct current calibration
12 Clearances and creepage distances for circuit
    breakers
Appendix
A Determination of short-circuit currents in low-
    voltage systems
      Three-phase systems
      Single-phase, 3-wire, 120/240-volt systems

This Standard is no longer for sale on the NEMA website. NEMA AB 1 is equivalent to the current edition of UL 489. To purchase this Standard, click here or contact IHS at 800-854-7179 or 303-397-7956 (outside the U.S.)

DocumentType
Standard
PublisherName
National Electrical Manufacturers Association
Status
Withdrawn

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IEEE 241 : 1990 ELECTRIC POWER SYSTEMS IN COMMERCIAL BUILDINGS
MIL-G-19826 Revision F:1984 GENERATOR SET, DIESEL ENGINE, ALTERNATING CURRENT FOR FACILITIES CONSTRUCTION, 1O KW THRU 500 KW (NOT STOCKED)
IEEE 902 : 1998 MAINTENANCE, OPERATION, AND SAFETY OF INDUSTRIAL AND COMMERCIAL POWER SYSTEMS
IEEE 141 : 1993 IEEE Recommended Practice for Electric Power Distribution for Industrial Plants
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OO-P-2895 Base Document:1997 PLANT, AGGREGATE, SECONDARY, WITH CONE CRUSHER, MOBILE, 75 TON PER HOUR CAPACITY
IEEE 551 : 2006 CALCULATING SHORT-CIRCUIT CURRENTS IN INDUSTRIAL AND COMMERCIAL POWER SYSTEMS
CC-G-2745 Base Document:1984 GENERATOR SETS, DIESEL ENGINE, ALTERNATING CURRENT, FOR FACILITIES CONSTRUCTION; 10 KW THROUGH 1000 KW (NOT STOCKED)
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IEEE 1205-2014 IEEE Guide for Assessing, Monitoring, and Mitigating Aging Effects on Electrical Equipment Used in Nuclear Power Generating Stations and Other Nuclear Facilities
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IEC 60898:1995 Electrical accessories - Circuit-breakers for overcurrent protection for household and similar installations
NEMA 250 : 2014 ENCLOSURES FOR ELECTRICAL EQUIPMENT (1000 VOLTS MAXIMUM)
IEC 60947-1:2007+AMD1:2010+AMD2:2014 CSV Low-voltage switchgear and controlgear - Part 1: General rules
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