ASTM B902/B902M-13(2018)
(Specification)Standard Specification for Compressed Round Stranded Copper Conductors, Hard, Medium-Hard, or Soft Using Single Input Wire Construction
Standard Specification for Compressed Round Stranded Copper Conductors, Hard, Medium-Hard, or Soft Using Single Input Wire Construction
ABSTRACT
This specification covers stranded conductors made from round copper wires, either uncoated or coated with tin, lead, or lead alloy for general use in insulated conductor assemblies for electrical purposes. These conductors shall be composed of one or more roller shaped or die closed layers of helically laid wires using the single input wire. For stranded conductors, the direction of lay of the outer layer shall be leeft hand and may be reversed or unidirectional/unilay in successive layers. Test for the physical and electrical properties of wires composing conductors made from hard-drawn or medium-hard-drawn wires, uncoated or coated, shall be made before but not after stranding. For the purpose of calculating mass, cross sections, and so forth, the density of the copper shall be taken. The mass and electrical resistance of a unit length of stranded unsealed conductor are a function of the lenght of lay shall be calculated.
SCOPE
1.1 This specification covers stranded conductors made from round copper wires, either uncoated or coated with tin, lead, or lead alloy for general use in insulated conductor assemblies for electrical purposes. These conductors shall be composed of one or more roller shaped or die closed layers of helically laid wires using the single input wire (SIW) methodology. (see Note 1 and Explanatory Note 1)
Note 1: Sealed conductors which are intended to prevent longitudinal water propagation and are further covered/insulated, are also permitted within the guidelines of this specification.
1.2 The values stated in inch-pound or SI units are to be regarded separately as standard. The values in each system are not exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.
1.2.1 For density, resistivity, and temperature, the values stated in SI units are to be regarded as standard.
1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
Relations
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:B902/B902M −13 (Reapproved 2018)
Standard Specification for
Compressed Round Stranded Copper Conductors, Hard,
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Medium-Hard, or Soft Using Single Input Wire Construction
This standard is issued under the fixed designation B902/B902M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope B189 Specification for Lead-Coated and Lead-Alloy-Coated
Soft Copper Wire for Electrical Purposes
1.1 This specification covers stranded conductors made
B193 Test Method for Resistivity of Electrical Conductor
from round copper wires, either uncoated or coated with tin,
Materials
lead, or lead alloy for general use in insulated conductor
B246 Specification for Tinned Hard-Drawn and Medium-
assemblies for electrical purposes. These conductors shall be
Hard-Drawn Copper Wire for Electrical Purposes
composed of one or more roller shaped or die closed layers of
B263 Test Method for Determination of Cross-Sectional
helically laid wires using the single input wire (SIW) method-
Area of Stranded Conductors
ology. (see Note 1 and Explanatory Note 1)
B354 Terminology Relating to Uninsulated Metallic Electri-
NOTE 1—Sealed conductors which are intended to prevent longitudinal
cal Conductors
water propagation and are further covered/insulated, are also permitted
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2.2 Other Standard:
within the guidelines of this specification.
NBS Handbook 100 —Copper Wire Tables
1.2 The values stated in inch-pound or SI units are to be
3. Classification
regarded separately as standard. The values in each system are
not exact equivalents; therefore, each system shall be used
3.1 The conductors described in this specification are in-
independently of the other. Combining values from the two
tendedforsubsequentinsulationorcovering.Theclassification
systems may result in nonconformance with the specification.
of these conductors is SIW compressed.
1.2.1 For density, resistivity, and temperature, the values
4. Ordering Information
stated in SI units are to be regarded as standard.
1.3 This international standard was developed in accor- 4.1 Orders for material under this specification shall include
dance with internationally recognized principles on standard- the following information:
ization established in the Decision on Principles for the
4.1.1 Quantity of each size,
Development of International Standards, Guides and Recom- 4.1.2 Conductorsize:circular-milareaorAWG(seeSection
mendations issued by the World Trade Organization Technical
7),
Barriers to Trade (TBT) Committee. 4.1.3 Class: SIW compressed (see 1.2 and Table 1),
4.1.4 Temper (see 5.3),
2. Referenced Documents
4.1.5 Whether coated or uncoated; if coated (see 5.1 and
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5.2).
2.1 ASTM Standards:
4.1.6 Details of special-purpose lays, if required (see 7.3).
B1 Specification for Hard-Drawn Copper Wire
4.1.7 When physical tests shall be made (see Sections 9 and
B2 Specification for Medium-Hard-Drawn Copper Wire
10).
B3 Specification for Soft or Annealed Copper Wire
4.1.8 Package size (see 16.1).
B33 Specification for Tin-Coated Soft or Annealed Copper
4.1.9 Lagging, if required (see 16.2).
Wire for Electrical Purposes
4.1.10 Special package marking, if required (see Section
16.3), and
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This specification is under the jurisdiction of ASTM Committee B01 of
4.1.11 Place of inspection (see Section 15).
Electrical Conductors and is the direct responsibility of Subcommittee B01.04 on
Conductors of Copper and Copper Alloys.
5. Requirements for Wires
Current edition approved Oct. 1, 2018. Published October 2018. Originally
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5.1 The purchaser shall designate the type of wire and the
approved in 2000. Last previous edition approved in 2013 as B902/B902M – 13 .
DOI: 10.1520/B0902_B0902M-13R18.
kind of coating, if any, to be used in the conductor.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
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Standards volume information, refer to the standard’s Document Summary page on Available from National Technical Information Service (NTIS), 5301 Shawnee
the ASTM website. Rd., Alexandria, VA 22312, http://www.ntis.gov.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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B902/B902M−13 (2018)
TABLE 1 Construction Requirements of Compressed Round SIW Standard Copper Conductors
Compressed Strand Dimensions
Conductor Size Nominal Nom
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