ASTM B978/B978M-21

Standard Specification for Concentric-Lay-Stranded Aluminum Conductors, Aluminum Matrix Composite Reinforced (ACAMCR), Formerly ACCR

SCOPE
1.1 This specification covers concentric-lay-stranded conductors made from round aluminum-zirconium alloy wires and an aluminum matrix composite (AMC) core wire(s) for use as overhead electrical conductors (Explanatory Note 1 and Explanatory Note 2).  
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.  
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

• Status: Historical
• Publication Date: 30-Sep-2021
• ICS: 29.060.10 - Wires
• Technical Committee: B01 - Electrical Conductors
• Drafting Committee: B01.07 - Conductors of Light Metals

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: B978/B978M − 21
Standard Specification for
Concentric-Lay-Stranded Aluminum Conductors, Aluminum
1
Matrix Composite Reinforced (ACAMCR), Formerly ACCR
This standard is issued under the fixed designation B978/B978M; 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 B976 Specification for Fiber Reinforced Aluminum Matrix
Composite (AMC) Core Wire for Aluminum Conductors,
1.1 This specification covers concentric-lay-stranded con-
Composite Reinforced (ACCR)
ductors made from round aluminum-zirconium alloy wires and
B1008 Test Method for Stress-Strain Testing for Overhead
an aluminum matrix composite (AMC) core wire(s) for use as
Electrical Conductors
overhead electrical conductors (Explanatory Note 1 and Ex-
E29 Practice for Using Significant Digits in Test Data to
planatory Note 2).
Determine Conformance with Specifications
1.2 The values stated in either SI units or inch-pound units
3
2.3 NIST Document:
are to be regarded separately as standard. The values stated in
NBS Handbook 100 Copper Wire Tables
each system are not necessarily exact equivalents; therefore, to
4
2.4 Aluminum Association Documents:
ensure conformance with the standard, each system shall be
Publication 50 Code Words for Overhead Aluminum Elec-
used independently of the other, and values from the two
trical Conductors
systems shall not be combined.
1.3 This international standard was developed in accor-
3. Terminology
dance with internationally recognized principles on standard-
3.1 Acronyms:
ization established in the Decision on Principles for the
3.1.1 ACAMCR—aluminum conductor, aluminum matrix
Development of International Standards, Guides and Recom-
composite reinforced
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee. 3.1.2 AMC—aluminum matrix composite
3.1.3 Al-Zr—aluminum zirconium
2. Referenced Documents
4. Ordering Information
2.1 The following documents form a part of this specifica-
tion to the extent referenced herein:
4.1 Orders for material under this specification shall include
2
the following information:
2.2 ASTM Standards:
4.1.1 Quantity of each size, stranding, and class,
B263 Test Method for Determination of Cross-Sectional
4.1.2 Conductor size, area (Section 8 and Table 1 and Table
Area of Stranded Conductors
2),
B354 Terminology Relating to Uninsulated Metallic Electri-
4.1.3 Number of wires, aluminum-zirconium alloy and
cal Conductors
AMC (see Table 1 and Table 2),
B682 Specification for Standard Metric Sizes of Electrical
4.1.4 Type of AMC core wires (see 5.3),
Conductors
4.1.5 Direction of lay of outer layer of aluminum-zirconium
B941 Specification for Heat Resistant Aluminum-Zirconium
alloy wires if other than right-hand (see 7.2),
Alloy Wire for Electrical Purposes
4.1.6 Special tension test, if desired (see 14.3),
4.1.7 Place of inspection (Section 16),
4.1.8 Package size and type (see 17.1),
1
This specification is under the jurisdiction of ASTM Committee B01 on
4.1.9 Heavy wood lagging, if required (see 17.3), and
Electrical Conductors and is the direct responsibility of Subcommittee B01.07 on
Conductors of Light Metals.
4.1.10 Special package marking, if required (see 17.4).
Current edition approved Oct. 1, 2021. Published October 2021. Originally
approved in 2014. Last previous edition approved in 2014 as B978/B978M – 14.
DOI: 10.1520/B0978_B0978M-21.
2 3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from National Institute of Standards and Technology (NIST), 100
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Bureau Dr., Stop 1070, Gaithersburg, MD 20899-1070, http://www.nist.gov.
4
Standards volume information, refer to the standard’s Document Summary page on Available from Aluminum Association, 1400 Crystal Dr., Suite 430, Arlington,
the ASTM website. VA 22202, http://www.aluminum.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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B978/B978M − 21
TABLE 1 Construction Requirements of Aluminum Conductors, Aluminum Matrix Composite Reinforced (ACAMCR)
Diameter
Cross Sectional Area,
2
in. Individual Wires
Stranding, Layers of Aluminum-
Aluminum- Rated Aluminum- Aluminum- Zirconium AMC Complete Total
Nominal, Zirconium Strength, Zirconium Zirconium Alloy, AMC, Core, Cable, Mass
Designation kcmil Alloy/AMC lb Alloy Total Alloy in. in. in. in. (lb)/1000 ft
300-T16 297 26/7 12100 0.233 0.271 2 0.107 0.083 0.249 0.677 337
336-T16 340 26/7 13900 0.267
...

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: B978/B978M − 14 B978/B978M − 21
Standard Specification for
Concentric-Lay-Stranded Aluminum Conductors, Aluminum
Matrix Composite Reinforced (ACCR)(ACAMCR), Formerly
1
ACCR
This standard is issued under the fixed designation B978/B978M; 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
1.1 This specification covers concentric-lay-stranded conductors made from round aluminum-zirconium alloy wires and an
aluminum matrix composite (AMC) core wire(s) for use as overhead electrical conductors (Explanatory Note 1 and Explanatory
Note 2).
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used
independently of the other, and values from the two systems shall not be combined.
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.
2. Referenced Documents
2.1 The following documents form a part of this specification to the extent referenced herein:
2
2.2 ASTM Standards:
B263 Test Method for Determination of Cross-Sectional Area of Stranded Conductors
B354 Terminology Relating to Uninsulated Metallic Electrical Conductors
B682 Specification for Standard Metric Sizes of Electrical Conductors
B941 Specification for Heat Resistant Aluminum-Zirconium Alloy Wire for Electrical Purposes
B976 Specification for Fiber Reinforced Aluminum Matrix Composite (AMC) Core Wire for Aluminum Conductors Aluminum
Matrix Composite Reinforced (ACAMCR) (formerly known as ACCR)
B1008 Test Method for Stress-Strain Testing for Overhead Electrical Conductors
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
3
2.3 NIST Document:
NBS Handbook 100 —CopperCopper Wire Tables
1
This specification is under the jurisdiction of ASTM Committee B01 on Electrical Conductors and is the direct responsibility of Subcommittee B01.07 on Conductors
of Light Metals.
Current edition approved April 1, 2014Oct. 1, 2021. Published April 2014October 2021. Originally approved in 2014. Last previous edition approved in 2014 as
B978/B978M – 14. DOI: 10.1520/B0978_B0978M-14.10.1520/B0978_B0978M-21.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from National Institute of Standards and Technology (NIST), 100 Bureau Dr., Stop 1070, Gaithersburg, MD 20899-1070, http://www.nist.gov.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
B978/B978M − 21
4
2.4 Aluminum Association Documents:
Publication 50 Code Words for Overhead Aluminum Electrical Conductors
Aluminum Association Guideline A Method of Stress-Strain Testing of Aluminum Conductors and ACSR and a Test Method for
Determining the Long Time Creep of Aluminum Conductors in Overhead Lines
3. Terminology
3.1 Acronyms:
3.1.1 ACCR—ACAMCR—aluminum conductor, aluminum matrix composite reinforced
3.1.2 AMC—aluminum matrix composite
3.1.3 Al-Zr—aluminum zirconium
4. Ordering Information
4.1 Orders for material under this specification shall include the following information:
4.1.1 Quantity of each size, stranding, and class,
4.1.2 Conductor size, area (Section 8 and Table 1 and Table 2),
4.1.3 Number of wires, aluminum-zirconium alloy and AMC (see Table 1 and Table 2),
4.1.4 Type of AMC core wires (see 5.3),
4.1.5 Direction of lay of outer layer of aluminum-zirconium alloy wires if other than right-hand (see 7.2),
4.1.6 Special tension test, if desired (see 14.3),
4.1.7 Place of inspection (Section 16),
4.1.8 Package size and type (see 17.1),
TABLE 1 Construction Requirements of Aluminum Conductors, Aluminum Matrix Composite Reinforced (ACCR)(ACAMCR)
Diameter
Cross Sectional Area,
2
in. Individual Wir
...