ASTM-B778 › Standard Specification for Shaped Wire Compact Concentric-Lay-Stranded Aluminum Conductors (AAC/TW)
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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 Notes 1 and 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. Note 2-The aluminum and temper designations conform to ANSI Standard H35.1. Aluminum 1350 corresponds to Unified Numbering System (UNS)Keywords
Aluminum electrical conductors; Lay factor (electrical conductor wire); Rated strength (electrical conductor wire); Steel wire strand; shaped wire compact concentric-lay-stranded aluminum conductors; (AAC/TW), spec; ICS Number Code 29.240.20 (Power transmission and distribution lines)
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29.240.20 (Power transmission and distribution lines)
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Document Number
ASTM-B0778-22
Revision Level
2022 EDITION
Status
Current
Modification Type
Revision
Publication Date
Jan. 30, 2023
Document Type
Specification
Page Count
4 pages
Committee Number
B01.07