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NEMA BU 1:2002

Withdrawn

Withdrawn

A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.

Busways

Withdrawn date

23-07-2013

Published date

15-10-2004

Preface
Foreword (ANCE)
Foreword (CSA)
Foreword (UL)
1 Scope
  1.1 Scope and object
  1.2 Normative references
  1.3 Components
  1.4 Fittings
  1.5 Short-run busway
  1.6 Insulating materials
2 Definitions
  2.1 General
  2.2 Constructional units of assemblies
  2.3 External design of assemblies
  2.4 Structural parts of assemblies
  2.5 Conditions of installation of assemblies
  2.6 Protective measures with regard to electric shock
  2.7 Gangways within an assembly
  2.8 Electronic functions
  2.9 Insulation co-ordination
  2.10 Short-circuit currents
3 Classification of assemblies
4 Electrical characteristics of assemblies
  4.1 Rated voltages
  4.2 Rated current (of a circuit of an assembly)
  4.3 Rated short-time withstand current (l[cw]) (of a
       circuit of an assembly)
  4.4 Rated peak withstand current (l[pk]) (of a circuit
       of an assembly)
  4.5 Rated conditional short-circuit current (l[cc])
       (of a circuit of an assembly)
  4.6 Rated fused short-circuit current (l[cf]) (of a
       circuit of an assembly)
  4.7 Rated diversity factor
  4.8 Rated frequency
5 Information to be given regarding the assembly
  5.1 Nameplates
  5.2 Markings
  5.3 Instructions for installation, operation, and
       maintenance
6 Service conditions
  6.1 Normal service conditions
  6.2 Special service conditions
  6.3 Conditions during transport, storage, and erection
7 Design and construction
  7.1 Mechanical design
  7.2 Enclosure and degree of protection
  7.3 Temperature rise
  7.4 Protection against electric shock
  7.5 Short-circuit protection and short-circuit withstand
       strength
  7.6 Switching devices and components installed in
       assemblies
  7.7 Internal separation of assemblies by barriers or
       partitions
  7.8 Electrical connections inside an assembly: bars and
       insulated conductors
  7.9 Requirements for electronic equipment supply circuits
  7.10 Electromagnetic compatibility
  7.11 Description of the types of electrical connections or
       functional units
8 Test specifications
  8.1 General (reserved)
  8.2 Type tests
  8.3 Routine tests
Annex A Standards for Components
Annex B Standards Referenced in the Trinational Busway
        Standard
Annex C Pressure Terminal Tightening Torque
Annex D Applicable Clauses
Annex E French Translations and Markings

This Standard is no longer for sale on the NEMA website. NEMA BU 1 is equivalent to the current edition of UL 857. To purchase this Standard, click here or contact IHS at 800-854-7179 or 303-397-7956 (outside the U.S.)

DevelopmentNote
Supersedes NEMA BU 2. (08/2001)
DocumentType
Standard
PublisherName
National Electrical Manufacturers Association
Status
Withdrawn
Supersedes

IEEE 241 : 1990 ELECTRIC POWER SYSTEMS IN COMMERCIAL BUILDINGS
IEEE 242-2001 IEEE Recommended Practice for Protection and Coordination of Industrial and Commercial Power Systems (IEEE Buff Book)
NEMA BU 2 : 1996 MAJOR REQUIREMENTS RELATED TO THE APPLICATION AND TESTING OF LOW VOLTAGE BUSWAY

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