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ASTM B778-22
Standard Specification for Shaped Wire Compact Concentric-Lay-Stranded Aluminum Conductors (AAC/TW)
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STANDARD published on 1.12.2022
The information about the standard:
Designation standards: ASTM B778-22
Publication date standards: 1.12.2022
SKU: NS-1101469
The number of pages: 4
Approximate weight : 12 g (0.03 lbs)
Country: American technical standard
Category: Technical standards ASTM
The category - similar standards:
Annotation of standard text ASTM B778-22 :
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.
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 Number Code 29.240.20 (Power transmission and distribution lines)
Additional information
| 1. Scope | ||||||||||||||||
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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.
Note 2:?The aluminum and temper designations conform to ANSI
Standard H 35.1. Aluminum 1350 corresponds to Unified Numbering
System (UNS) A91350 in accordance with Practice E527.
1.3?This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. |
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| 2. Referenced Documents | ||||||||||||||||
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