ASTM B857-95

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

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 or SI units are to be regarded separately as standard. Each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the specification. 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 designation by AWG or kcmil, the requirements in SI units have been numerically converted from corresponding values stated or derived in inch-pound units. For conductor sizes designated by SI units only, the requirements are stated or derived in SI units.
1.2.1 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). 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.

General Information

• Status: Historical
• Publication Date: 09-Apr-2002
• ICS: 29.060.10 - Wires
• Technical Committee: B01 - Electrical Conductors
• Drafting Committee: B01.07 - Conductors of Light Metals

Relations

• Replaced By: ASTM B857-01 - Standard Specification for Shaped Wire Compact Concentric-Lay-Stranded Aluminum Conductors, Coated-Steel Supported (ACSS/TW)
• Effective Date: 10-Apr-2002

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn. Contact ASTM International (www.astm.org) for the latest information.
Designation: B 857 – 95
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Specification for
Shaped Wire Compact Concentric-Lay-Stranded Aluminum
1
Conductors, Coated-Steel Supported (ACSS/TW)
This standard is issued under the fixed designation B 857; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope B 263 Test Method for Determination of Cross-Sectional
2
Area of Stranded Conductors
1.1 This specification covers shaped wire compact
B 341 Specification for Aluminum-Coated (Aluminized)
concentric-lay-stranded aluminum conductors, steel supported
Steel Core Wire for Aluminum Conductors, Steel Rein-
(ACSS/TW) for use as overhead electrical conductors (see
2
forced (ACSR/AZ)
Note 1 and Note 2).
B 354 Terminology Relating to Uninsulated Metallic Elec-
NOTE 1—In this specification only shaped wire compact concentric-lay- 2
trical Conductors
stranded aluminum conductors, steel supported, are specifically desig-
B 498 Specification for Zinc-Coated (Galvanized) Steel
nated. Conductor constructions not included in this specification should be
Core Wire for Aluminum Conductors, Steel Reinforced
agreed upon between the manufacturer and the purchaser when placing the
2
(ACSR)
order.
B 500 Specification for Metallic Coated Stranded Steel
NOTE 2—For definitions of terms relating to conductors, refer to
Definitions B 354.
Core for Aluminum Conductors, Steel Reinforced
2
(ACSR)
1.2 The values stated in inch-pound units are to be regarded
B 502 Specification for Aluminum-Clad Steel Core Wire for
as the standard with the exception of temperature and resistiv-
2
Aluminum Conductors, Aluminum-Clad Steel Reinforced
ity. The SI equivalents given in parentheses may be approxi-
B 549 Specification for Concentric-Lay-Stranded Alumi-
mate.
num Conductors, Aluminum-Clad Steel Reinforced
NOTE 3—ACSS/TW is designed to increase the aluminum area for a 2
(ACSR/AW)
given diameter of conductor by the use of trapezoidal shaped wires (TW).
B 606 Specification for High-Strength Zinc-Coated (Galva-
The conductors consist of a central core of round steel wire(s) surrounded
nized) Steel Core Wire for Aluminum and Aluminum-
by two or more layers of trapezoidal aluminum 1350-0 wires. Different
2
Alloy Conductors, Steel Reinforced
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 B 609 Specification for Aluminum 1350 Round Wire, An-
2
(see Table 1, Table 2, and Table 3). For the purpose of this specification,
nealed and Intermediate Temper, for Electrical Purposes
the sizes listed in Table 1 and Table 2 are tabulated on the basis of the
B 779 Specification for Shaped Wire Compact Concentric-
finished conductor having an area or outside diameter equal to that of
Lay-Stranded Aluminum Conductors, Steel-Reinforced
specified sizes of standard ACSR, ACSS, and ACSR/TW so as to facilitate
2
(ACSR/TW)
conductor selection.
B 802 Specification for Zinc-5 % Aluminum-Mischmetal
NOTE 4—The aluminum and temper designations conform to ANSI
Alloy-Coated Steel Core Wire for Aluminum Conductors,
Standard H 35.1. Aluminum 1350 corresponds to Unified Number System
2
(UNS) A91350 in accordance with Practice E 527.
Steel-Reinforced (ACSR)
B 803 Specification for High-Strength Zinc-5 %
2. Referenced Documents
Aluminum-Mischmetal Alloy-Coated Steel Core Wire for
2.1 The following documents of the issue in effect on date
Aluminum and Aluminum-Alloy Conductors, Steel-
2
of material purchase form part of this specification to the extent
Reinforced
referenced herein:
E 29 Practice for Using Significant Digits in Test Data to
3
2.2 ASTM Standards:
Determine Conformance with Specifications
4
B 232 Specification for Concentric-Lay-Stranded Alumi-
E 527 Practice for Numbering Metals and Alloys (UNS)
2
num Conductors, Coated Steel Reinforced (ACSR)
2.3 Military Standard:
5
MIL-C-12000 Cable: Cord and Wire, Electric Packaging of
1
This specification is under the jurisdiction of ASTM Committee B-1 on
3
Electrical Conductors and is the direct responsibility of Subcommittee B01.07 Annual Book of ASTM Standards, Vol 14.02.
4
Conductors of Light Metals. Annual Book of ASTM Standards, Vol 01.01.
5
Current edition approved April 15, 1994. Published June 1995. Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700
2
Annual Book of ASTM Standards, Vol 02.03. Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.
1

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