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ASTM B226-04

(Specification)

Standard Specification for Cored, Annular, Concentric-Lay-Stranded Copper Conductors

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 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.

General Information

Status
Historical
Publication Date
31-Mar-2004
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 B226-95(2003) - Standard Specification for Cored, Annular, Concentric-Lay-Stranded Copper Conductors
Effective Date
01-Apr-2004
Replaced By
ASTM B226-11 - Standard Specification for Cored, Annular, Concentric-Lay-Stranded Copper Conductors
Effective Date
01-Apr-2011

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ASTM B226-04 - Standard Specification for Cored, Annular, Concentric-Lay-Stranded Copper ConductorsASTM B226-04 - Standard Specification for Cored, Annular, Concentric-Lay-Stranded Copper Conductors
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ASTM B226-04 - Standard Specification for Cored, Annular, Concentric-Lay-Stranded Copper 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: B226 – 04
Standard Specification for
Cored, Annular, Concentric-Lay-Stranded Copper
1
Conductors
This standard is issued under the fixed designation B226; 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 ductors Having Bunch-Stranded Members, for Electrical
Conductors
1.1 This specification covers cored, annular, concentric-lay-
B173 Specification for Rope-Lay-Stranded Copper Con-
stranded conductors made from round soft copper wires, either
ductors Having Concentric-Stranded Members, for Elec-
uncoated or coated with tin for use as electrical conductors
trical Conductors
(Explanatory Note 1 and Note 2).
B174 Specification for Bunch-Stranded Copper Conductors
1.2 The constructions prescribed herein are suitable for bare
for Electrical Conductors
conductors, or for conductors to be covered with weather-
B263 Test Method for Determination of Cross-Sectional
resistant (weather-proof) material, or for conductors to be
Area of Stranded Conductors
insulated with rubber, varnished cloth, or impregnated paper,
B354 Terminology Relating to Uninsulated Metallic Elec-
except types such as “oil-filled” or “gas-filled” (Explanatory
trical Conductors
Note 3).
B496 Specification for Compact Round Concentric-Lay-
1.3 Cored, annular conductor constructions not included in
Stranded Copper Conductors
this specification shall be specifically agreed upon between the
B784 Specification for Modified Concentric-Lay-Stranded
manufacturer and the purchaser when placing the order.
Copper Conductors for Use in Insulated Electrical Cables
1.4 These constructions are not recommended for use as
3
electric furnace leads where great flexibility is required and
B785 Specification for Compact Round Modified
special conductor designs are indicated in consideration of the
Concentric-Lay-Stranded Copper Conductors for Use in
particular service requirements.
4
Insulated Electrical Cables(Discontinued 1998)
1.5 The SI values for density are regarded as the standard.
B787/B787M Specification for 19 Wire Combination
For all other properties the inch-pound values are to be
Unilay-Stranded Copper Conductors for Subsequent Insu-
regarded as standard and the SI units may be approximate.
lation
2. Referenced Documents B835 Specification for Compact Round Stranded Copper
Conductors Using Single Input Wire Construction
2.1 The following documents in effect at the time of
B902 Specification for Compressed Round Stranded Cop-
reference form a part of these methods to the extent referenced
per Conductors, Hard, Medium-Hard, or Soft Using Single
herein:
2
Input Wire Construction
2.2 ASTM Standards:
2.3 American National Standard:
B3 Specification for Soft or Annealed Copper Wire
5
ANSI C42.35 Definitions of Electrical Terms
B8 Specification for Concentric-Lay-Stranded Copper Con-
2.4 NIST:
ductors, Hard, Medium-Hard, or Soft
6
NBS Handbook 100—Copper Wire Tables
B33 Specification forTinned Soft orAnnealed CopperWire
for Electrical Purposes
3. Ordering Information
B172 Specification for Rope-Lay-Stranded Copper Con-
3.1 Orders for material under this specification shall include
the following information:
1
This specification is under the jurisdiction of ASTM Committee B01 on
Electrical Conductors and is the direct responsibility of Subcommittee B01.04 on
3
Conductors of Copper and Copper Alloys. Withdrawn.
4
Current edition approved April 1, 2004. Published April 2004. Originally Withdrawn. The last approved version of this historical standard is referenced
approved in 1948. Last previous edition approved in 1995 as B226 – 95. DOI: on www.astm.org.
5
10.1520/B0226-04. Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 4th Floor, New York, NY 10036.
6
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM NBS Handbook 100, available from National Technical Information Service
Standards volume information, refer to the standard’s Document Summary page on (NTIS), U.S. Department of Commerce, 5285 Port Royal Rd., Springfield, VA
the ASTM website. 22161.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
B226 – 04
3.1.1 Quantity of each size, 5. Joints
3.1.2 Conductor size: circular-mil area (Section 7 and Table
5.1 No splice shall be made in the conductor as a whole.
1),
Welds or brazes may be made in the finished individual wires.
3.1.3 Whether coated or uncoated; if coated, designate type
Not more than one of the wire
...

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ABSTRACT
This specification covers standard requirements for bare-concentric-lay stranded conductors made from round copper wires, either uncoated or coated with tin, lead, or lead alloy for general use for electrical purposes. These conductors shall be constructed with a central core surrounded by one or more layers of helically laid wires. The conductors shall be classified as follows: Class AA, Class A, Class B, Class C, and Class D. Sizes, number of wires, and diameter of wires in the various classes of concentric-lay-stranded conductors shall conform to the prescribed requirements. Welds and brazes may be made in rods or in wires prior to final drawing. The completed conductor of varying classes shall conform to the minimum distance required between the joints. Diameters, areas, and mass of concentric-lay-stranded copper conductors shall conform to the prescribed requirements. Physical and electrical tests of conductors stranded of hard-drawn or medium-hard-drawn wires shall be conducted before but not after stranding. The approximate mass and electrical resistance may be determined using the required increments. The material shall also conform to the temperature corrections factor for conductor resistance.
SCOPE
1.1 This specification covers bare concentric-lay-stranded conductors made from round copper wires, either uncoated or coated with tin, lead, or lead alloy for general use for electrical purposes. These conductors shall be constructed with a central core surrounded by one or more layers of helically laid wires.  
Note 1: This specification also permits conductors for use as covered or insulated electrical conductors.
Note 2: Sealed conductors, that are intended to prevent longitudinal water propagation and are further covered/insulated, are also permitted within the guidelines of this specification.  
1.2 For the purposes of this specification, conductors are classified as follows (Explanatory Note 1 and Note 2):  
1.2.1 Class AA—For bare conductors usually used in overhead lines.  
1.2.2 Class A—For conductors to be covered with weather-resistant (weather-proof), slow-burning materials, and for bare conductors where greater flexibility than is afforded by Class AA is required.  
1.2.3 Class B—For conductors to be insulated with various materials such as rubber, paper, varnished cloth, and so forth, and for the conductors indicated under Class A where greater flexibility is required.  
1.2.4 Class C and Class D—For conductors where greater flexibility is required than is provided by Class B conductors.  
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Standard Specification for Concentric-Lay-Stranded Conductors of 8000 Series Aluminum Alloy for Subsequent Covering or Insulation

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This specification covers aluminum alloys in the 8000 series in tempers “0” and H1X or H2X bare compact-round, compressed and conventional concentric-lay-stranded conductors made from round or shaped wires used as covered or insulated electrical conductors. These conductors shall be composed of a central core surrounded by one or more compacted, compressed or conventional layers of helically applied wires. Joints may be made in any of the wires of any stranding by electric-butt welding, cold-pressure welding, or electric-butt, cold-upset welding. The construction of the conductors shall conform to the construction requirements prescribed in this specification. Tests for the mechanical and electrical properties of wire composing the conductor shall be made before standing. Wires annealed before stranding shall meet the requirements of the prescribed specification. The tensile requirements shall be the same as those for round wires of equal nominal area.
SCOPE
1.1 This specification covers aluminum alloys in the 8000 series cited in B800 in tempers “0” and H1X or H2X bare compact-round, compressed and conventional concentric-lay-stranded conductors made from round or shaped wires used as covered or insulated electrical conductors. These conductors shall be composed of a central core surrounded by one or more compacted, compressed or conventional layers of helically applied wires (Explanatory Note 1 and Note 2).  
1.2 The SI values for resistivity are regarded as standard. For all other properties, the inch-pound units are regarded as standard and the SI units may be approximate.  
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ASTM B786/B786M-08(2023)(Specification)
Standard Specification for 19 Wire Combination Unilay-Stranded Aluminum Conductors for Subsequent Insulation

ABSTRACT
This specification covers the standard requirements for bare combination unilay-stranded conductors made from round wires of aluminum 1350 and 8000 series of aluminum alloys, for insulated conductors to be used for electrical purposes. Aluminum 1350 wires in tempers -H19, -H16 or -H26, -H14 or -H24, and -H142 or -H242 and 8000 series aluminum alloy wires in tempers “0” and H1X or H2X are permitted. These conductors shall be constructed with a central core wire surrounded by two layers of helically laid wires, resulting in an outer diameter equal to the compressed-stranded equivalent conductors. Electric-butt welds, cold pressure welds, or electric-butt cold-upset welds may be made in the finished individual wires composing the conductor. Mechanical (tension) and electrical tests shall be performed on the wires composing the conductors that are annealed and not annealed after stranding. The mass and electrical resistance of a unit length of stranded conductor shall be determined as a function of the length of lay. The conductors shall meet the breaking strength, tensile strength, and bending strength requirements.
SCOPE
1.1 This specification covers bare combination unilay-stranded conductors made from round wires of aluminum 1350 and 8000 series of aluminum alloys, for insulated conductors for electrical purposes. Aluminum 1350 wires in tempers -H19 (extra hard), -H16 or -H26 (3/4 hard), -H14 or -H24 (1/2 hard), and -H142 or -H242 (1/2 hard) and 8000 series aluminum alloys wires in tempers “0” and H1X or H2X are permitted. These conductors shall be constructed with a central core wire surrounded by two layers of helically laid wires, resulting in an outer diameter equal to the compressed-stranded equivalent conductors.  
Note 1: For the purpose of this specification, combination unilay conductor is defined as follows: a central core wire surrounded by a layer of six helically laid wires of the same diameter as the core wire with a helically laid outer layer containing six smaller wires alternated between six wires of the same diameter as the wires in the layer underneath. Both layers have a common length and direction of lay (see Fig. 1).
FIG. 1 Cross Section of Conductor  
1.1.1 For the purpose of this specification, normal conductor classification (Class AA, A, B, C) is not applicable, as these conductors are intended for subsequent insulation. The descriptive term combination unilay-stranded shall be used in place of conductor classification (Note 2 and Note 3).
Note 2: Prior to 1975, aluminum 1350 was designated as EC aluminum.
Note 3: The aluminum and temper designations conform to ANSI Standard H35.1. Aluminum 1350 corresponds to Unified Numbering System A91350 in accordance with Practice E527. Unified Numbering System alloy designations for 8000 Series aluminum alloys in accordance with Practice E527 are listed in Table number 1 of Specification B800.  
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ASTM B229-12(2023)(Specification)
Standard Specification for Concentric-Lay-Stranded Copper and Copper-Clad Steel Composite Conductors

ABSTRACT
This specification covers concentric-lay-stranded conductors made from uncoated hard-drawn round copper wires in combination with hard-drawn round copper-clad steel wires for general use as overhead electrical conductors. The conductors are classified under the following type designations: Type A, Type C, Type D, Type E, Type EK, Type F, Type G, Type J, Type K, Type N, Type P, and Type V. Welds and brazes may be made in copper rods or in copper wires prior to final drawing. Joints may not be made in the finished copper wires composing concentric-lay-stranded composite conductors containing a total of seven wires or less. In other conductors, welds and brazes may be made in the finished individual copper wires composing the conductor. Also, the joints or splices may be made in the finished individual copper-clad steel wires composing concentric-lay-stranded conductors, provided that such joints or splices have a protection equivalent to that of the wire itself and that they do not decrease the strength of the finished stranded conductor below the minimum breaking strength. The density, mass, and resistance of the wires shall be determined.
SCOPE
1.1 This specification covers concentric-lay-stranded conductors made from uncoated hard-drawn round copper wires in combination with hard-drawn round copper-clad steel wires for general use as overhead electrical conductors.  
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Type A  
Type G  
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Type J  
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Type V
FIG. 1 Standard Types of Composite Conductors  
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ABSTRACT
This specification covers compact round concentric-lay stranded conductors made from aluminum 1350-H19 (extra hard) wires and round zinc-coated, aluminum-coated, or aluminum-clad steel core wires usually used in overhead lines. Compact ACSR covered by this specification has five types of steel core wire which are designated by ACSR/GA/COMP, ACSR/GB/COMP, ACSR/GC/COMP, ACSR/AZ/COMP, ACSR/AW/COMP. Electric-butt welds, electric-butt, cold-upset welds, or cold-pressure welds in the individual round-drawn or shaped aluminum wires shall be made during the stranding process. The preferred lay of the aluminum wires of aluminum conductors, steel-reinforced, having a single wire steel core and one layer of aluminum wires shall be 14 times the outside diameter of the conductor but the lay shall be not less than 13 nor more than 16 times that diameter. The diameter of the steel core wire, the number of aluminum wires, the aluminum cross-sectional area, the diameter and weight of the compact round concentric-lay-stranded aluminum conductors, steel-reinforced, shall conform to the construction requirements. The rated strength of a completed conductor shall be taken as the aggregate strength of the aluminum and steel components, and shall be calculated according to the prescribed computation. The mass and electrical resistance of a unit length of stranded conductor shall be a function of the length of lay. Tests for mechanical and electrical properties of aluminum wires composing the conductors shall be made before stranding.
SCOPE
1.1 This specification covers compact round concentric-lay-stranded conductors made from aluminum 1350-H19 (extra hard) wires and round zinc-coated, aluminum-coated, or aluminum-clad steel core wires usually used in overhead lines. These conductors shall be constructed with one steel core wire surrounded by one or more layers of helically-laid compacted or otherwise shaped aluminum wires (Explanatory Note 1 and Note 2).  
1.2 Compact ACSR covered by this specification has five types of steel core wire which are designated by abbreviations as follows (Explanatory Note 2 and Note 7).  
1.2.1 ACSR/GA2/COMP—Compact ACSR using Class A zinc-coated steel wire,  
1.2.2 ACSR/GC2/COMP—Compact ACSR using Class C zinc-coated steel wire,  
1.2.3 ACSR/AW2/COMP—Compact ACSR using aluminum-clad steel wire, AW2 (Normal Strength),  
1.2.4 ACSR/AW3/COMP—Compact ACSR using aluminum-clad steel wire, AW3 (High Strength).  
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ABSTRACT
This specification covers concentric-lay-stranded aluminum conductors, coated-steel reinforced (ACSR), made from round aluminum 1350-H19 wires and round, coated steel core wire for use as overhead electrical conductors. ACSR covered by this specification has nine types of coated steel core wire which are designated by abbreviations as follows: ACSR/GA-ACSR, ACSR/GB-ACSR, ACSR/GC-ACSR, ACSR/MA-ACSR, ACSR/MB-ACSR, ACSR/MC-ACSR, ACSR/HS-ACSR, ACSR/MS-ACSR, and ACSR/AZ-ACSR. Before stranding, the aluminum wire and steel core wire shall meet the requirements prescribed. ACSR may be constructed using steel core wire with any one of nine types of protective coatings. The acceptable core wires are galvanized steel core wires, coating Classes A, B, or C ; high-strength galvanizes steel core wire; Zn-5Al-MM coated steel core wire; coating Classes A, B, or C ; aluminized steel core wire in accordance with the prescribed specifications. Tests for mechanical and electrical properties of zinc-coated, Zn-5Al-MM coated or aluminum coated steel wires shall be made before stranding. All aluminum wires composing the conductors shall be capable of meeting the bending property requirements after stranding.
SCOPE
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,  
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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 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 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 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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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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