ASTM B778-97
Historical Standard: ASTM B778-97 Standard Specification for Shaped Wire Compact Concentric-Lay-Stranded Aluminum Conductors (AAC/TW)
SUPERSEDED (see Active link, below)
ASTM B778
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 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) A91350 in accordance with Practice E527.
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 Available from Aluminum Association, Inc., 1525 Wilson Blvd., Suite 600, Arlington, VA 22209, http://www.aluminum.org.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/B0778-97
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