ASTM B549-10

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.
Designation:B549–04 Designation: B549 – 10
Standard Specification for
Concentric-Lay-Stranded Aluminum Conductors, Aluminum-
Clad Steel Reinforced (ACSR/AW)Concentric-Lay-Stranded
Aluminum Conductors, Aluminum-Clad Steel Reinforced for
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Use in Overhead Electrical Conductors
This standard is issued under the fixed designation B549; 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 1350-H19 (extra hard) aluminum
wires and round aluminum-clad steel core wires for use as overhead electrical conductors (Explanatory Note 1 and Note 2).
1.2 The SI values of density and resistivity are to be regarded as standard. For all other properties the inch-pound units are
regarded as standard and the SI units may be approximate.
2. Referenced Documents
2.1 The following documents of the issue in effect on date of material purchase form a part of this specification to the extent
referenced herein.
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2.2 ASTM Standards:
B230/B230M Specification for Aluminum 1350H19 Wire for Electrical Purposes
B263 Test Method for Determination of Cross-Sectional Area of Stranded Conductors
B354 Terminology Relating to Uninsulated Metallic Electrical Conductors
B502 Specification for Aluminum-Clad Steel Core Wire for Aluminum Conductors, Aluminum-Clad Steel Reinforced
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
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2.3 ANSI Standards:
ANSI C 42.100 Dictionary of Electrical and Electronics Terms
ANSI H 35.1 American National Standard Alloy and Temper Designation Systems for Aluminum
2.4 Other Standard:
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NBS Handbook 100—Copper Wire Tables of the National Bureau of Standards
3. Terminology
3.1 Description of Terms Specific to This Standard
3.1.1 ACSR covered by this specification has one type of steel core wire which is designated by the following abbreviation
(Explanatory Note 2):
3.1.1.1 ACSR/AW—ACSR using aluminum-clad steel wire (Explanatory Note 2).
4. Classification
4.1 For the purpose of this specification, conductors are classified as follows (Explanatory Note 1 and Note 2):
4.1.1 Class AA—For bare conductors usually used in overhead lines. These conductors are used as follows:
4.1.1.1 Conductors used for regular overhead line construction and
4.1.1.2 Conductors having a high ratio of mechanical strength to current-carrying capacity used for overhead ground wires and
for extra-long span construction.
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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 Sept.April 1, 2004.2010. Published September 2004.May 2010. Originally approved in 1971. Last previous edition approved in 20002004 as
B549 – 004. DOI: 10.1520/B0549-104.
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For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM 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.
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Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
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Available from National Technical Information Service (NTIS), U.S. Department of Commerce, 5285 Port Royal Rd., Springfield, VA 22161.
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Available from National Technical Information Service (NTIS), U.S. Department of Commerce, Alexandria, Virginia 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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B549 – 10
4.1.2 Class A—For conductors to be covered with weather-resistant (weatherproof) materials.
5. Ordering Information
5.1 Orders for material under this specification shall include the following information:
5.1.1 Quantity of each size, stranding, and class,
5.1.2 Conductor size: circular mil area or AWG of aluminum wires (Section 9 and Table 1),
5.1.3 Number of wires, aluminum, and aluminum-clad steel (Table 1),
5.1.4 Direction of lay of outer layer of aluminum wires if other than right-hand (see 8.2),
5.1.5 Special tests, if required (see 15.3 and 15.5),
5.1.6 Package size (see 17.1 and Explanatory Note 5),
5.1.7 Special package mar
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