Abstract
This specification covers shaped wire compact concentric-lay-stranded aluminum conductor (AAC/TW) and its component wires for use as overhead electrical conductors. The trapezoidal aluminum wires shall meet the prescribed tensile strength and elongation requirements. Electric-butt welds, electric-butt cold-upset welds, or cold-pressure welds may be made in the individual aluminum wires during the stranding process. Requirements for the lay and construction of the conductor are detailed. The methods of determining the rated strength, breaking strength, mass, and electrical resistance are given. Tests for mechanical and electrical properties of aluminum wires shall be made before stranding. For the purpose of calculating mass per unit length, cross-sections, and the like, the density of aluminum to be taken is specified.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1. Scope
1.1 This specification covers shaped wire compact concentric-lay-stranded aluminum conductor (AAC/TW) and its component wires for use as overhead electrical conductors (Explanatory Note 1 and Note 2). 1.2 The values stated in inch-pound units are to be regarded as the standard with the exception of temperature and resistivity. The SI equivalents of inch-pound units may be approximate. Note 1??? AAC/TW is designed to increase the aluminum area for a given diameter of conductor by the use of trapezoidally shaped wires (TW). The conductors consist of a central core of one round aluminum wire or a seven-strand compact round core surrounded by two or more layers of trapezoidal aluminum 1350-H19 wires. For the purposes of this specification, the sizes listed are tabulated on the basis of the finished conductor having an area equal to that of specific sizes of standard AAC (Table 1) or in fixed diameter increments (Table 2) so as to facilitate conductor selection.TABLE 1 Construction Requirements for Shaped Wire Compact Concentric-Lay-Stranded Aluminum Conductors Sized to Have Areas Equal to AAC Size | Code WordA | AAC/TW
Conductor size | Nominal Outside
Diameter | Number of
Aluminum
Wires | Number
of Layers | Nominal Mass | Rated Strength | | kcmil | mm | in. | mm | lb/1000ft | kg/km | 1000 lbf | kN | | Tulip/TW | 336.4 | 170 | 0.612 | 15.5 | 17 | 2 | 315.3 | 469.4 | 6.02 | 26.8 | | Canna/TW | 397.5 | 201 | 0.661 | 16.8 | 17 | 2 | 372.6 | 554.7 | 6.96 | 31 | | Cosmos/TW | 477.0 | 242 | 0.720 | 18.3 | 17 | 2 | 447.1 | 665.6 | 8.36 | 37.2 | | Zinnia/TW | 500.0 | 253 | 0.736 | 18.7 | 17 | 2 | 468.7 | 697.7 | 8.76 | 39 | | Mistletoe/TW | 556.5 | 282 | 0.775 | 19.7 | 17 | 2 | 521.6 | 776.5 | 9.75 | 43.4 | | Meadowsweet/TW | 600.0 | 304 | 0.803 | 20.4 | 17 | 2 | 562.4 | 837.2 | 10.52 | 46.8 | | Orchid/TW | 636.0 | 322 | 0.825 | 21.0 | 17 | 2 | 596.1 | 887.4 | 11.1 | 49.4 | | Verbena/TW | 700.0 | 355 | 0.864 | 21.9 | 17 | 2 | 656.1 | 976.7 | 12.3 | 54.7 | | Nasturtium/TW | 750.0 | 380 | 0.893 | 22.7 | 17 | 2 | 702.1 | 1045 | 13.1 | 58.3 | | Arbutus/TW | 795.0 | 403 | 0.919 | 23.3 | 17 | 2 | 745.1 | 1109 | 13.6 | 60.5 | | Cockscomb/TW | 900.0 | 456 | 0.990 | 25.1 | 31 | 3 | 843.6 | 1256 | 15.4 | 68.5 | | Magnolia/TW | 954.0 | 483 | 1.018 | 25.9 | 31 | 3 | 894.2 | 1331 | 16.4 | 72.9 | | Hawkweed/TW | 1000.0 | 507 | 1.041 | 26.4 | 31 | 3 | 937.3 | 1395 | 17.1 | 76.1 | | Bluebell/TW | 1033.5 | 524 | 1.057 | 26.8 | 31 | 3 | 968.7 | 1442 | 17.7 | 78.7 | | Marigold/TW | 1113.0 | 564 | 1.095 | 27.8 | 31 | 3 | 1043.2 | 1553 | 19.1 | 85.0 | | Hawthorn/TW | 1192.5 | 604 | 1.132 | 28.8 | 31 | 3 | 1117.7 | 1664 | 20.4 | 90.7 | | Narcissus/TW | 1272.0 | 644 | 1.168 | 29.7 | 31 | 3 | 1192.2 | 1775 | 21.8 | 97.0 | | Columbine/TW | 1351.5 | 685 | 1.202 | 30.5 | 31 | 3 | 1266.3 | 1885 | 23.2 | 103 | | Carnation/TW | 1431.0 | 725 | 1.236 | 31.4 | 31 | 3 | 1341.3 | 1997 | 24.0 | 107 | | Coreopsis/TW | 1590.0 | 805 | 1.315 | 33.4 | 49 | 4 | 1490.3 | 2219 | 27.0 | 120 | | Jessamine/TW | 1750.0 | 887 | 1.377 | 35.0 | 49 | 4 | 1640.3 | 2442 | 29.7 | 132 | | Cowslip/TW | 2000.0 | 1013 | 1.468 | 37.3 | 49 | 4 | 1893.0 | 2818 | 33.9 | 151 | | Lupine/TW | 2500.0 | 1266 | 1.648 | 41.9 | 71 | 5 | 2366.2 | 3522 | 41.9 | 186 | | Trillium/TW | 3000.0 | 1520 | 1.799 | 45.7 | 71 | 5 | 2839.5 | 4227 | 50.3 | 224 | TABLE 2 Construction Requirements for Shaped Wire Compact Concentric-Lay-Stranded Aluminum Conductors, in Fixed-Diameter Increments | Code WordA | AAC/TW
Conductor Size | Nominal Outside
Diameter | Number of
Aluminum
Wires | Number
of Layers | Nominal Mass | Rated Strength | | kcmil | mm | in. | mm | lb/1000 ft | kg/km | 1000 lbf | kN | | Logan/TW | 322.5 | 163 | 0.60 | 15.2 | 17 | 2 | 302.3 | 450 | 5.88 | 26.2 | | | 384.5 | 195 | 0.65 | 16.5 | 17 | 2 | 360.4 | 536.5 | 6.74 | 30 | | Wheeler/TW |
2. Referenced Documents (purchase separately)  The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
B230/B230M Specification for Aluminum 1350-H19 Wire for Electrical Purposes
B263 Test Method for Determination of Cross-Sectional Area of Stranded Conductors
B354 Terminology Relating to Uninsulated Metallic 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 Documents
AluminumAssociationP Code Words for Overhead Aluminum Electrical Conductors
Keywords
AAC/TW; aluminum conductor; compact conductor; compact conductor, aluminum; concentric-lay-stranded aluminum conductor; electrical conductor; electrical conductor, aluminum; shaped wire compact conductor; shaped wire compact conductor, aluminum; shaped wire conductor; shaped wire conductor, aluminum; trapezoidal conductor; trapezoidal conductor, aluminum;
ICS Code
ICS Number Code 29.240.20 (Power transmission and distribution lines)
DOI: 10.1520/B0778-02R12
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