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ASTM B172-10

(Specification)

Standard Specification for Rope-Lay-Stranded Copper Conductors Having Bunch-Stranded Members, for Electrical Conductors

Standard Specification for Rope-Lay-Stranded Copper Conductors Having Bunch-Stranded Members, for Electrical Conductors

ABSTRACT
This specification covers bare rope-lay-stranded conductors having bunch-stranded members from round copper wires, either uncoated or coated with tin, lead, or lead-alloy for use in electrical conductors. Rope-lay-stranded conductors having bunch-stranded members are classified as Class I, Class K, and Class M. Necessary joints in wires or in groups of wires shall be made in accordance with accepted commercial practice, taking into account the size of the wire or group of wires as related to the size of the entire conductor. Conductors of the same size and description furnished on one order shall have the same lay. In very flexible conductors, such as welding conductor, the direction of lay of the stranded members forming rope-lay-stranded conductor may be in the same, rather than in teversed. For the purpose of calculating the mass, cross sections, etc., the density of copper shall be taken. The mass and electrical resistance of a unit length of stranded conductor as a function of the length of lay shall be measured.
SCOPE
1.1 This specification covers bare rope-lay-stranded conductors having bunch-stranded members made from round copper wires, either uncoated or coated with tin, lead, or lead-alloy for use as electrical conductors (Explanatory Notes 1 and 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.

General Information

Status
Historical
Publication Date
31-Mar-2010
ICS
29.060.20 - Cables
Technical Committee
B01 - Electrical Conductors
Drafting Committee
B01.04 - Conductors of Copper and Copper Alloys
Current Stage
Ref Project

Relations

Replaces
ASTM B172-01a(2007)e1 - Standard Specification for Rope-Lay-Stranded Copper Conductors Having Bunch-Stranded Members, for Electrical Conductors
Effective Date
01-Apr-2010
Replaced By
ASTM B172-10(2015) - Standard Specification for Rope-Lay-Stranded Copper Conductors Having Bunch-Stranded Members, for Electrical Conductors
Effective Date
01-Apr-2015
Referred By
ASTM B174-17 - Standard Specification for Bunch-Stranded Copper Conductors for Electrical Conductors
Effective Date
01-Apr-2010
Referred By
ASTM B173-17 - Standard Specification for Rope-Lay-Stranded Copper Conductors Having Concentric-Stranded Members, for Electrical Conductors
Effective Date
01-Apr-2010
Referred By
ASTM F855-23 - Standard Specifications for Temporary Protective Grounds to Be Used on De-energized Electric Power Lines and Equipment
Effective Date
01-Apr-2010
Referred By
ASTM B226-11(2021) - Standard Specification for Cored, Annular, Concentric-Lay-Stranded Copper Conductors
Effective Date
01-Apr-2010
Referred By
ASTM F2321-23 - Standard Specification for Flexible and Rigid Insulated Temporary By-Pass Jumpers
Effective Date
01-Apr-2010
Referred By
ASTM B738-13(2018) - Standard Specification for Fine-Wire Bunch-Stranded and Rope-Lay Bunch-Stranded Copper Conductors for Use as Electrical Conductors
Effective Date
01-Apr-2010
Referred By
ASTM F2249-23 - Standard Specification for In-Service Test Methods for Temporary Grounding Jumper Assemblies Used on De-Energized Electric Power Lines and Equipment
Effective Date
01-Apr-2010
Referred By
ASTM B8-11(2017) - Standard Specification for Concentric-Lay-Stranded Copper Conductors, Hard, Medium-Hard, or Soft
Effective Date
01-Apr-2010

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ASTM B172-10 - Standard Specification for Rope-Lay-Stranded Copper Conductors Having Bunch-Stranded Members, for Electrical ConductorsASTM B172-10 - Standard Specification for Rope-Lay-Stranded Copper Conductors Having Bunch-Stranded Members, for Electrical Conductors
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REDLINE ASTM B172-10 - Standard Specification for Rope-Lay-Stranded Copper Conductors Having Bunch-Stranded Members, for Electrical ConductorsREDLINE ASTM B172-10 - Standard Specification for Rope-Lay-Stranded Copper Conductors Having Bunch-Stranded Members, for Electrical Conductors
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REDLINE ASTM B172-10 - Standard Specification for Rope-Lay-Stranded Copper Conductors Having Bunch-Stranded Members, for Electrical Conductors
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Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:B172 −10
StandardSpecification for
Rope-Lay-Stranded Copper Conductors Having Bunch-
1
Stranded Members, for Electrical Conductors
This standard is issued under the fixed designation B172; 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 Department of Defense.
1. Scope tors Having Concentric-Stranded Members, for Electrical
Conductors
1.1 This specification covers bare rope-lay-stranded con-
B189 Specification for Lead-Coated and Lead-Alloy-Coated
ductors having bunch-stranded members made from round
Soft Copper Wire for Electrical Purposes
copper wires, either uncoated or coated with tin, lead, or
B193 Test Method for Resistivity of Electrical Conductor
lead-alloy for use as electrical conductors (Explanatory Notes
Materials
1 and 2).
B263 Test Method for Determination of Cross-Sectional
1.2 Coated wires shall include only those wires with fin-
Area of Stranded Conductors
ished diameters and densities substantially equal to the respec-
B354 Terminology Relating to Uninsulated Metallic Electri-
tive diameters and densities of uncoated wires.
cal Conductors
1.3 The values stated in inch-pound or SI units are to be 2.3 American National Standard:
3
regarded separately as standard. Each system shall be used ANSI C42.35 Definitions of Electrical Terms
independently of the other. Combining values from the two
3. Classification
systems may result in nonconformance with the specification.
For conductor sizes designated byAWG or kcmil, the require-
3.1 For the purpose of this specification rope-lay-stranded
ments in SI units have been numerically converted from
conductors having bunch-stranded members are classifed as
corresponding values, stated or derived, in inch-pound units.
follows:
For conductor sizes designated by SI units only, the require-
3.1.1 Class I—Conductors consisting of wires 0.0201-in.
ments are stated or derived in SI units.
(0.511-mm) diameter (No. 24 AWG) to produce rope-lay-
2
1.3.1 For density, resistivity, and temperature, the values
stranded conductors up to 2 000 000 cmil (1013 mm ) in total
stated in SI units are to be regarded as standard.
cross-sectional area. (Typical use is for special apparatus
conductor.)
2. Referenced Documents
3.1.2 Class K—Conductors consisting of wires 0.0100-in.
(0.254-mm) diameter (No. 30 AWG) to produce rope-lay-
2.1 The following documents of the issue in effect at the
2
stranded conductors up to 1 000 000 cmil (507 mm ) in total
time of reference form a part of this specification to the extent
cross-sectional area. (Typical use is for special portable cord
referenced herein:
and conductors.)
2
2.2 ASTM Standards:
3.1.3 Class M—Conductors consisting of wires 0.0063-in.
B3 Specification for Soft or Annealed Copper Wire
(0.160-mm) diameter (No. 34 AWG) to produce rope-lay-
B33 Specification for Tin-Coated Soft or Annealed Copper
2
stranded conductors up to 1 000 000 cmil (507 mm ) in total
Wire for Electrical Purposes
cross-sectional area. (Typical use is for welding conductors.)
B173 Specification for Rope-Lay-Stranded Copper Conduc-
4. Ordering Information
4.1 Orders for material under this specification shall include
1
This specification is under the jurisdiction of ASTM Committee B01 on
the following information:
Electrical Conductors and is the direct responsibility of Subcommittee B01.04 on
Conductors of Copper and Copper Alloys.
4.1.1 Quantity of each size and class,
Current edition approved April 1, 2010. Published May 2010. Originally
4.1.2 Conductor size: circular-mil area or AWG (see 7.1),
approved in 1942 to replace portions of B158–41 T. Last previous edition approved
ε1
4.1.3 Class (Section 4 and Tables 1-3),
in 2007 as B172 – 01a (2007) . DOI: 10.1520/B0172-10.
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
3
Standards volume information, refer to the standard’s Document Summary page on Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
the ASTM website. 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 ----------------------
B172−10
A
TABLE 1 Construction Requirements of Class I Rope-Lay Stranded Copper Conductors Having Bunch Stranded Members
Uncoated Copper Coated Copper
Wire
Diameter
0.0201
in. Nominal Maximum Nominal Maximum
(0.511 Approximate dc resistance dc resistance dc resistance dc resistance
B
...

This document is not anASTM standard and is intended only to provide the user of anASTM 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.
´1
Designation:B172–01a (Reapproved 2007) Designation: B172 – 10
Standard Specification for
Rope-Lay-Stranded Copper Conductors Having Bunch-
1
Stranded Members, for Electrical Conductors
This standard is issued under the fixed designation B172; 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 Department of Defense.
1
´ NOTE—Table1 was editorially corrected in March 2007.
1. Scope
1.1 This specification covers bare rope-lay-stranded conductors having bunch-stranded members made from round copper
wires, either uncoated or coated with tin, lead, or lead-alloy for use as electrical conductors (Explanatory Notes 1 and 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.
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
B33 Specification for Tin-Coated Soft or Annealed Copper Wire for Electrical Purposes
B173 Specification for Rope-Lay-Stranded Copper Conductors Having Concentric-Stranded Members, for Electrical Conduc-
tors
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 bunch-stranded members are classifed as follows:
3.1.1 Class I—Conductors consisting of wires 0.0201-in. (0.511-mm) diameter (No. 24 AWG) to produce rope-lay-stranded
2
conductors up to 2 000 000 cmil (1013 mm ) in total cross-sectional area. (Typical use is for special apparatus conductor.)
3.1.2 Class K—Conductors consisting of wires 0.0100-in. (0.254-mm) diameter (No. 30 AWG) to produce rope-lay-stranded
2
conductors up to 1 000 000 cmil (507 mm ) in total cross-sectional area. (Typical use is for special portable cord and conductors.)
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 March 15, 2007. Published April 2007. Originally approved in 1942 to replace portions of B158–41 T. Last previous edition approved in 2001
as B172–01a. DOI: 10.1520/B0172-01AR07E01.
Current edition approved April 1, 2010. Published May 2010. Originally approved in 1942 to replace portions of B158–41 T. Last previous edition approved in 2007 as
´1
B172 – 01a (2007) . DOI: 10.1520/B0172-10.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. ForAnnualBookofASTMStandards
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 ----------------------
B172 – 10
3.1.3 Class M—Conductors consisting of wires 0.0063-in. (0.160-mm) diameter (No. 34 AWG) to produce rope-lay-stranded
2
conductors up to 1 000 000 cmil (507 mm ) in total cross-sectional area.
...

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1.1 This specification covers concentric-lay-stranded conductors made from round aluminum 1350-H19 (extra hard) wires and round, coated steel core wire(s) for use as overhead electrical conductors (Explanatory Note 1 and Explanatory Note 2).  
1.2 ACSR covered by this specification has nine types of coated steel core wire which are designated by abbreviations as follows (Explanatory Note 2):  
1.2.1 ACSR/GA or ACSR/GA2—ACSR using Class A zinc-coated steel wire,  
1.2.2 ACSR/GC or ACSR/GC2—ACSR using Class C zinc-coated steel wire,  
1.2.3 ACSR/MA or ACSR/MA2—ACSR using Class A Zn-5A1-MM coated steel wire,  
1.2.4 ACSR/HS or ACSR/GA3—ACSR using Class A zinc-coated high-strength steel wires,  
1.2.5 ACSR/MS or ACSR/MA3—ACSR using Class A Zn-5A1-MM coated high-strength steel wires,  
1.2.6 ACSR/GA4—ACSR using Class A zinc-coated extra-high-strength steel wires,  
1.2.7 ACSR/MA4—ACSR using Class A Zn-5A1-MM coated extra-high-strength steel wires,  
1.2.8 ACSR/GA5—ACSR using Class A zinc-coated ultra-high-strength steel wires,  
1.2.9 ACSR/MA5—ACSR using Class A Zn-5Al-MM coated ultra-high-strength steel wires.  
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.  
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 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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ASTM
ASTM B228-11a(2021)(Specification)
Standard Specification for Concentric-Lay-Stranded Copper-Clad Steel Conductors

ABSTRACT
This specification covers bare concentric-lay-stranded conductors made from bare round copper-clad steel wires for general use for electrical purposes. Conductors are classified as follows: Grade 40 HS, Grade 30 HS, and Grade 30 EHS. The numbers and diameters of the wires in the concentric-lay-stranded conductors shall conform to the requirements prescribed. Tests for physical and electrical properties of wires composing concentric-lay-stranded conductors made from copper-clad steel wire shall be made before stranding.
SCOPE
1.1 This specification covers bare concentric-lay-stranded conductors made from bare round copper-clad steel wires for general use for electrical purposes.  
1.2 For the purpose of this specification, conductors are classified as follows: Grade 40 HS, Grade 30 HS, Grade 30 EHS, Grade 40 DSA, and Grade 30 DSA.
The grades covered by this specification correspond to the following commercial designations:    
Grade 40 HS,  
High Strength, 40 % Conductivity, Hard Drawn  
Grade 30 HS,  
High Strength, 30 % Conductivity, Hard Drawn  
Grade 30 EHS,  
Extra High Strength, 30 % Conductivity, Hard Drawn  
Grade 40 DSA,  
40 % Conductivity, Dead Soft Annealed  
Grade 30 DSA,  
30 % Conductivity, Dead Soft Annealed  
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 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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ASTM
ASTM B226-11(2021)(Specification)
Standard Specification for Cored, Annular, Concentric-Lay-Stranded Copper Conductors

ABSTRACT
This specification covers cored, annular, concentric-lay-stranded conductors made from round soft copper wires either uncoated or coated with tin for use as electrical conductors. The core may be of any materials and its size and surface firmness as a base for the overlaid wires shall be adequated to prevent forcing or dropping of any wire out of its layer position. No splice shall be made in the conductor as a whole, welds or brazes may be made in the finished individual wires. The materials shall conform to the required nominal conductor size, number of layers of wires, number, diameter, lay-up wires, approximate core diameter, and maximum conductor diameter. The mass per unit length and electrical resistance of a unit length of stranded conductor are a function of the length of lay and shall be calculated. The are of cross section of a conductor shall be considered to be the sum of the cross-sectional areas of its component wires at any section when measured perpendicularly to their individual axes.
SCOPE
1.1 This specification covers cored, annular, concentric-lay-stranded conductors made from round soft copper wires, either uncoated or coated with tin for use as electrical conductors (Explanatory Note 1 and Note 2).  
1.2 The constructions prescribed herein are suitable for bare conductors, or for conductors to be covered with weather-resistant (weather-proof) material, or for conductors to be insulated with rubber, varnished cloth, or impregnated paper, except types such as “oil-filled” or “gas-filled” (Explanatory Note 3).  
1.3 Cored, annular conductor constructions not included in this specification shall be specifically agreed upon between the manufacturer and the purchaser when placing the order.  
1.4 These constructions are not recommended for use as electric furnace leads where great flexibility is required and special conductor designs are indicated in consideration of the particular service requirements.  
1.5 The SI values for density are regarded as the standard. For all other properties the inch-pound values are to be regarded as standard and the SI units may be approximate.  
1.6 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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ASTM
ASTM B973-10(2020)e1(Specification)
Standard Specification for Tin-Coated Braid and Ribbon Flat Copper Wire intended for use in Electronic Application

ABSTRACT
This specification covers tin-coated hard-drawn copper braid and ribbon flat wire intended for electronic application. The tin shall be electroplated for the coating and shall be commercially pure. For purposes of this specification, the tin shall be considered commercially pure if the total of other elements, exclusive of copper, does not exceed 1%. This specification covers electrical resistivity requirements, permissible variations in thickness, permissible variations in width, and limiting number of test specimens for coating test.
SCOPE
1.1 This specification covers tin-coated hard-drawn copper braid and ribbon flat wire intended for electronic application (Explanatory Note 1).  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.2.1 Exceptions—The SI values for density, resistivity, and volume are to be regarded as standard.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
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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ASTM
ASTM B971-10(2020)e1(Specification)
Standard Specification for Silver-Coated Braid and Ribbon Flat Copper Wire intended for use in Electronic Application

ABSTRACT
This specification covers silver-coated copper braid and ribbon flat wire intended for electronic application. Two classes of silver-coated braid and ribbon flat copper wire are covered: Class A (annealed temper) and Class H (hard-drawn). The material shall be silver-coated flat wire of such quality and purity that the finished product shall meet the properties and characteristics prescribed in this specification. The specification covers tensile properties, electrical resistivity requirements, permissible variations in thickness, and permissible variations in width.
SCOPE
1.1 This specification covers silver-coated copper braid and ribbon flat wire intended for electronic application (Explanatory Note 1).  
1.2 Two classes of silver-coated braid and ribbon flat copper wire are covered as follows:  
1.2.1 Class A—Annealed temper.  
1.2.2 Class H—Hard-drawn.  
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.3.1 Exceptions—The SI values for density, resistivity, and volume are to be regarded as standard.  
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 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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