ASTM B857-11e2

    Standard Specification for Shaped Wire Compact Concentric-Lay-Stranded Aluminum Conductors, Coated-Steel Supported (ACSS/TW)


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    1. Scope

    1.1 This specification covers shaped wire compact concentric-lay-stranded aluminum conductors, steel supported (ACSS/TW) for use as overhead electrical conductors (see 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—For conductor sizes designated by AWG or kcmil sizes, the requirements in SI units are numerically converted from the corresponding requirements in inch-pound units. For conductor sizes designated by SI units only, the requirements are stated or derived in SI units. For density, resistivity, and temperature, the values stated in SI units are to be regarded as standard.

    1.3 ACSS/TW is designed to increase the aluminum area for a given diameter of conductor by the use of trapezoidal shaped wires (TW), or to reduce the diameter for a given area of aluminum. The conductors consist of a central core of round steel wire(s) surrounded by two or more layers of trapezoidal aluminum 1350-0 wires. Different strandings of the same size of conductor are identified by type, which is the approximate ratio of steel area to aluminum area expressed in percent (see Table 1, Table 2, and Table 3). For the purpose of this specification, the sizes listed in Table 1 and Table 2 are tabulated on the basis of the finished conductor having an area or outside diameter equal to that of specified sizes of standard ACSR, ACSS, and ACSR/TW so as to facilitate conductor selection.

    TABLE 1 Construction Requirements for Shaped Wire Compact Concentric-Lay-Stranded Aluminum Conductors, Coated Steel SupportedA
    Note 1Sized to have area equal aluminum cross-sectional area to an ACSR or ACSS, Class AA conductor.

    ACSS/TW
    Conductor Size

    Code WordB

    Size and Stranding
    of ACSS
    with Equal Aluminum
    Cross-Sectional Area

    Aluminum
    Stranding

    Steel Core
    Stranding

    Nominal Mass
    ACSS/TW

    ACSS/TW Conductor Rated Strength
    (by type of steel core wire)

    Nominal
    Outside
    Diameter

    kcmilC

    Type

    kcmil

    Stranding

    Number
    of
    Aluminum
    Wires

    Number
    of
    Layers

    Number
    of
    Wires

    Individual Strand Wire
    Diameter,
    in.

    GAX Core
    lb/1000 ft

    †GA2 / MA2 KIPS

    †GA3 / MA3 KIPS

    GA4 / MA4 KIPS

    GA5 / MA5 KIPS

    AW2 KIPS

    AW3
    KIPS

    in.

    266.8

    16

    Partridge/ACSS/TW

    266.8

    26/7

    18

    2

    7

    0.0788

    349

    8.90

    9.70

    10.8

    11.4

    8.40

    8.90

    0.58

     336.4

    23

    Oriole/ACSS/TW

     336.4

    30/7

    17

    2

     7

    0.1059

     526

    14.8

    16.3

    18.2

    19.1

    14.2

    14.8

    0.69

     477.0

    13

    Flicker/ACSS/TW

     477.0

    24/7

    18

    2

     7

    0.0940

     612

    13.0

    14.2

    15.7

    16.4

    12.5

    13.0

    0.78

     477.0

    16

    Hawk/ACSS/TW

     477.0

    26/7

    18

    2

     7

    0.1053

     655

    15.6

    17.1

    18.9

    19.8

    14.9

    15.6

    0.79

     477.0

    23

    Hen/ACSS/TW

     477.0

    30/7

    17

    2

     7

    0.1261

     746

    21.0

    22.7

    25.4

    26.7

    20.1

    20.5

    0.83

     556.5

    13

    Parakeet/ACSS/TW

     556.5

    24/7

    18

    2

     7

    0.1015

     714

    15.2

    16.6

    18.3

    19.1

    14.6

    15.2

    0.84

     556.5

    16

    Dove/ACSS/TW

     556.5

    26/7

    20

    2

     7

    0.1138

     764

    18.2

    19.9

    22.1

    23.1

    17.5

    18.2

    0.85

     636.0

    13

    Rook/ACSS/TW

     636.0

    24/7

    18

    2

     7

    0.1085

     818

    17.3

    19.0

    20.9

    21.9

    16.7

    17.3

    0.89

     636.0

    16

    Grosbeak/ACSS/TW

     636.0

    26/7

    20

    2

     7

    0.1216

     873

    20.7

    22.4

    24.8

    26.0

    19.9

    20.3

    0.91

     795.0

     7

    Tern/ACSS/TW

     795.0

    45/7

    17

    2

     7

    0.0886

     891

    14.2

    15.2

    16.6

    17.5

    13.5

    14.2

    0.96

     795.0

    10

    Puffin/ACSS/TW

     795.0

    22/7

    18

    2

     7

    0.1108

     974

    18.9

    20.6

    22.6

    23.7

    18.3

    18.9

    0.98

     795.0

    13

    Condor/ACSS/TW

     795.0

    54/7

    20

    2

     7

    0.1213

    1020

    21.7

    23.3

    25.7

    26.9

    20.9

    21.3

    0.99

     795.0

    16

    Drake/ACSS/TW

     795.0

    26/7

    20

    2

     7

    0.1360

    1091

    25.9

    28.0

    31.0

    32.5

    24.4

    25.4

    1.01

     795.0

    23

    Mallard/ACSS/TW

     795.0

    30/19

    22

    2

    19

    0.0977

    1234

    34.3

    37.9

    42.1

    44.3

    32.9

    34.3

    1.05

     954.0

     5

    Phoenix/ACSS/TW

     954.0

    42/7

    30

    3

     7

    0.0837

    1028

    14.2

    15.2

    16.3

    17.1

    13.6

    14.2

    1.05

     954.0

     7

    Rail/ACSS/TW

     954.0

    45/7

    32

    3

     7

    0.0971

    1074

    16.7

    18.0

    19.6

    20.4

    16.2

    16.7

    1.06

     954.0

    13

    Cardinal/ACSS/TW

     954.0

    54/7

    20

    2

     7

    0.1329

    1227

    26.0

    28.0

    30.9

    32.3

    24.6

    25.5

    1.08

    1033.5

     5

    B263 Test Method for Determination of Cross-Sectional Area of Stranded Conductors

    B354 Terminology Relating to Uninsulated Metallic Electrical Conductors

    B498/B498M Specification for Zinc-Coated (Galvanized) Steel Core Wire for Use in Overhead Electrical Conductors

    B500/B500M Specification for Metallic Coated or Aluminum Clad Stranded Steel Core for Use in Overhead Electrical Conductors

    B502 Specification for Aluminum-Clad Steel Core Wire for Use in Overhead Electrical Aluminum Conductors

    B549 Specification for Concentric-Lay-Stranded Aluminum Conductors, Aluminum-Clad Steel Reinforced for Use in Overhead Electrical Conductors

    B606 Specification for High-Strength Zinc-Coated (Galvanized) Steel Core Wire for Aluminum and Aluminum-Alloy Conductors, Steel Reinforced

    B609/B609M Specification for Aluminum 1350 Round Wire, Annealed and Intermediate Tempers, for Electrical Purposes

    B802/B802M Specification for Zinc-5 % Aluminum-Mischmetal Alloy-Coated Steel Core Wire for Aluminum Conductors, Steel Reinforced (ACSR)

    B803 Specification for High-Strength Zinc-5 % Aluminum-Mischmetal Alloy-Coated Steel Core Wire for Use in Overhead Electrical Conductors

    B856 Specification for Concentric-Lay-Stranded Aluminum Conductors, Coated Steel Supported (ACSS)

    B957 Specification for Extra-High-Strength and Ultra-High-Strength Zinc-Coated (Galvanized) Steel Core Wire for Overhead Electrical Conductors

    B958 Specification for Extra-High-Strength and Ultra-High-Strength Class A Zinc-5% Aluminum-Mischmetal Alloy-Coated Steel Core Wire for Use in Overhead Electrical Conductors

    E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications

    E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)

    Other Standards

    AluminumAssociationP Code Words for Overhead Aluminum Electrical Conductors Available from Aluminum Association, Inc., 1525 Wilson Blvd., Suite 600, Arlington, VA 22209, http://www.aluminum.org.

    NBS Handbook 100--Copper Wire Tables of the National Bureau of Standards Available from National Technical Information Service (NTIS), 5301 Shawnee Rd., Alexandria, VA 22312, http://www.ntis.gov.


    ICS Code

    ICS Number Code 29.060.10 (Wires)

    UNSPSC Code

    UNSPSC Code 26121500(Electrical wire)


    Referencing This Standard

    DOI: 10.1520/B0857-11E02

    ASTM International is a member of CrossRef.


    Citation Format

    ASTM B857-11e2, Standard Specification for Shaped Wire Compact Concentric-Lay-Stranded Aluminum Conductors, Coated-Steel Supported (ACSS/TW), ASTM International, West Conshohocken, PA, 2011, www.astm.org

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