ASTM B173-17
(Specification)Standard Specification for Rope-Lay-Stranded Copper Conductors Having Concentric-Stranded Members, for Electrical Conductors
Standard Specification for Rope-Lay-Stranded Copper Conductors Having Concentric-Stranded Members, for Electrical Conductors
ABSTRACT
This specification covers bare rope-lay-stranded conductors having concentric-stranded members made from round copper wires, either uncoated or coated with tin, lead, or lead-alloy for use as electrical conductors. Coated wires shall include only those wires with finished diameters and densities substantially equal to the respective diameters and densities of uncoated wires. The rope-lay-stranded copper conductors under this specification are classified either as Class G or Class H. Requirements for joint construction (by soldering, brazing, or welding), lay length, and strand construction are detailed. Tests for the electrical properties of wires composing conductors made from soft or annealed copper wire, bare or coated, shall be made before stranding, while tests for the physical properties (such as elongation) may be made upon the wires before stranding or upon wires removed from the completed stranded conductors, but need not be made upon both. Elongation tests to determine compliance shall not be made on the conductor as a unit. If a tinning, lead-coating, or lead-alloy-coating test is required, it shall be made on the wires prior to stranding. The method of calculating mass, cross-sections and electrical resistance, and the prescribed density of copper to be taken for calculations are given.
SCOPE
1.1 This specification covers bare rope-lay-stranded conductors having concentric-stranded members made from round copper wires, either uncoated or coated with tin, lead, or lead-alloy for use as electrical conductors (Explanatory Note 1 and Note 2).
1.2 Coated wires shall include only those wires with finished diameters and densities substantially equal to the respective diameters and densities of uncoated wires.
1.3 The values stated in inch-pound or SI units are to be regarded separately as standard. Each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the specification. For conductor sizes designated by AWG or kcmil, the requirements in SI units have been numerically converted from corresponding values, stated or derived, in inch-pound units. For conductor sizes designated by SI units only, the requirements are stated or derived in SI units.
1.3.1 For density, resistivity, and temperature, the values stated in SI units are to be regarded as standard.
1.4 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.
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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:B173 −17
Standard Specification for
Rope-Lay-Stranded Copper Conductors Having Concentric-
1
Stranded Members, for Electrical Conductors
This standard is issued under the fixed designation B173; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
2
1. Scope 2.2 ASTM Standards:
B3 Specification for Soft or Annealed Copper Wire
1.1 This specification covers bare rope-lay-stranded con-
B8 Specification for Concentric-Lay-Stranded Copper
ductors having concentric-stranded members made from round
Conductors, Hard, Medium-Hard, or Soft
copper wires, either uncoated or coated with tin, lead, or
B33 Specification for Tin-Coated Soft or Annealed Copper
lead-alloy for use as electrical conductors (Explanatory Note 1
Wire for Electrical Purposes
and Note 2).
B172 Specification for Rope-Lay-Stranded Copper Conduc-
torsHavingBunch-StrandedMembers,forElectricalCon-
1.2 Coated wires shall include only those wires with fin-
ductors
ished diameters and densities substantially equal to the respec-
B189 Specification for Lead-Coated and Lead-Alloy-Coated
tive diameters and densities of uncoated wires.
Soft Copper Wire for Electrical Purposes
1.3 The values stated in inch-pound or SI units are to be
B193 Test Method for Resistivity of Electrical Conductor
regarded separately as standard. Each system shall be used
Materials
independently of the other. Combining values from the two
B263 Test Method for Determination of Cross-Sectional
systems may result in nonconformance with the specification.
Area of Stranded Conductors
For conductor sizes designated byAWG or kcmil, the require-
B354 Terminology Relating to Uninsulated Metallic Electri-
ments in SI units have been numerically converted from
cal Conductors
corresponding values, stated or derived, in inch-pound units.
2.3 American National Standard:
3
For conductor sizes designated by SI units only, the require-
ANSI C42.35 Definitions of Electrical Terms
ments are stated or derived in SI units.
1.3.1 For density, resistivity, and temperature, the values
3. Classification
stated in SI units are to be regarded as standard.
3.1 For the purpose of this specification rope-lay-stranded
1.4 This international standard was developed in accor- conductors having concentric-stranded members are classified
as follows:
dance with internationally recognized principles on standard-
3.1.1 Class G—Conductors consisting of 7 to 61 rope-lay-
ization established in the Decision on Principles for the
stranded members, each of which consists of 7 to 19
Development of International Standards, Guides and Recom-
concentric-stranded wires, with total conductor sizes ranging
mendations issued by the World Trade Organization Technical
2 2
from No. 14AWG (2.08 mm ) to 5 000 000 cmil (2534 mm ).
Barriers to Trade (TBT) Committee.
(Typical use is for rubber-sheathed conductor, apparatus
conductor, portable conductor, and similar applications.)
2. Referenced Documents
3.1.2 Class H—Conductors consisting of 19 to 91 rope-lay-
2.1 The following documents of the issue in effect at the
stranded members, each of which consists of 7 to 19
time of reference form a part of this specification to the extent
concentric-stranded wires, with total conductor sizes ranging
2 2
referenced herein:
from No. 9 AWG (6.63 mm ) to 5 000 000 cmil (2534 mm ).
1 2
This specification is under the jurisdiction of ASTM Committee B01 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Electrical Conductors and is the direct responsibility of Subcommittee B01.04 on contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Conductors of Copper and Copper Alloys. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved April 1, 2017. Published April 2017. Originally the ASTM website.
3
approvedin1942toreplaceportionsofB158 – 41 T.Lastpreviouseditionapproved Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
in 2015 as B173 – 10 (2015). DOI: 10.1520/B0173-17. 4th Floor, New York, NY 10036, http://www.ansi.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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B173−17
Class K construction produces a conductor with greater flex- 7. Construction
ibility than class G. (Ty
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: B173 − 10 (Reapproved 2015) B173 − 17
Standard Specification for
Rope-Lay-Stranded Copper Conductors Having Concentric-
1
Stranded Members, for Electrical Conductors
This standard is issued under the fixed designation B173; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope
1.1 This specification covers bare rope-lay-stranded conductors having concentric-stranded members made from round copper
wires, either uncoated or coated with tin, lead, or lead-alloy for use as electrical conductors (Explanatory Note 1 and Note 2).
1.2 Coated wires shall include only those wires with finished diameters and densities substantially equal to the respective
diameters and densities of uncoated wires.
1.3 The values stated in inch-pound or SI units are to be regarded separately as standard. Each system shall be used
independently of the other. Combining values from the two systems may result in nonconformance with the specification. For
conductor sizes designated by AWG or kcmil, the requirements in SI units have been numerically converted from corresponding
values, stated or derived, in inch-pound units. For conductor sizes designated by SI units only, the requirements are stated or
derived in SI units.
1.3.1 For density, resistivity, and temperature, the values stated in SI units are to be regarded as standard.
1.4 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.
2. Referenced Documents
2.1 The following documents of the issue in effect at the time of reference form a part of this specification to the extent
referenced herein:
2
2.2 ASTM Standards:
B3 Specification for Soft or Annealed Copper Wire
B8 Specification for Concentric-Lay-Stranded Copper Conductors, Hard, Medium-Hard, or Soft
B33 Specification for Tin-Coated Soft or Annealed Copper Wire for Electrical Purposes
B172 Specification for Rope-Lay-Stranded Copper Conductors Having Bunch-Stranded Members, for Electrical Conductors
B189 Specification for Lead-Coated and Lead-Alloy-Coated Soft Copper Wire for Electrical Purposes
B193 Test Method for Resistivity of Electrical Conductor Materials
B263 Test Method for Determination of Cross-Sectional Area of Stranded Conductors
B354 Terminology Relating to Uninsulated Metallic Electrical Conductors
2.3 American National Standard:
3
ANSI C42.35 Definitions of Electrical Terms
3. Classification
3.1 For the purpose of this specification rope-lay-stranded conductors having concentric-stranded members are classified as
follows:
1
This specification is under the jurisdiction of ASTM Committee B01 on Electrical Conductors and is the direct responsibility of Subcommittee B01.04 on Conductors
of Copper and Copper Alloys.
Current edition approved April 1, 2015April 1, 2017. Published April 2015April 2017. Originally approved in 1942 to replace portions of B158 – 41 T. Last previous
edition approved in 20102015 as B173 – 10.B173 – 10 (2015). DOI: 10.1520/B0173-10R15.10.1520/B0173-17.
2
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 Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
B173 − 17
3.1.1 Class G—Conductors consisting of 7 to 61 rope-lay-stranded members, each of which consists of 7 to 19 concentric-
2 2
stranded wires, with total conductor sizes ranging from No. 14 AWG (2.08 mm ) to 5 000 000 cmil (2534 mm ). (Typical use is
for rubber-sheathed conductor, apparatus conductor, portable conductor, and similar applications.)
3.1.2 Class H—Conductors consisting of 19 to 91 rope-lay-stranded members, each of which consists of 7 to 19
2 2
concentric-
...
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