ASTM B857-01a

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

• Replaces: ASTM B857-01 - Standard Specification for Shaped Wire Compact Concentric-Lay-Stranded Aluminum Conductors, Coated-Steel Supported (ACSS/TW)
• Effective Date: 10-Apr-2002
• Replaced By: ASTM B857-02 - Standard Specification for Shaped Wire Compact Concentric-Lay-Stranded Aluminum Conductors, Coated-Steel Supported (ACSS/TW)
• Effective Date: 10-Apr-2002
• Referred By: ASTM B1006-17 - Standard Specification for Electrical Overhead Conductor Code Word Names
• Effective Date: 10-Apr-2002
• Referred By: ASTM B856-22 - Standard Specification for Concentric-Lay-Stranded Aluminum Conductors, Coated Steel Supported (ACSS)
• Effective Date: 10-Apr-2002

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: B 857 – 01a
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 232 Specification for Concentric-Lay-Stranded Alumi-
2
num Conductors, Coated Steel Reinforced (ACSR)
1.1 This specification covers shaped wire compact
B 263 Test Method for Determination of Cross-Sectional
concentric-lay-stranded aluminum conductors, steel supported
2
Area of Stranded Conductors
(ACSS/TW) for use as overhead electrical conductors (see
B 341/B 341M Specification for Aluminum-Coated (Alu-
Explanatory Note 1).
minized) Steel Core Wire for Aluminum Conductors, Steel
1.2 The values stated in inch-pound or SI units are to be
2
Reinforced (ACSR/AZ)
regarded separately as standard. Each system shall be used
B 354 Terminology Relating to Uninsulated Metallic Elec-
independently of the other. Combining values from the two
2
trical Conductors
systems may result in non-conformance with the specification.
B 498/B 498M Specification for Zinc-Coated (Galvanized)
For conductor sizes designated by AWG or kcmil sizes, the
Steel Core Wire for Aluminum Conductors, Steel Rein-
requirements in SI units are numerically converted from the
2
forced (ACSR)
corresponding requirements in inch-pound units. For conductor
B 500/B 500M Specification for Metallic Coated Stranded
sizes designation by AWG or kcmil, the requirements in SI
Steel Core for Aluminum Conductors, Steel Reinforced
units have been numerically converted from corresponding
2
(ACSR)
values stated or derived in inch-pound units. For conductor
B 502 Specification for Aluminum-Clad Steel Core Wire for
sizes designated by SI units only, the requirements are stated or
2
Aluminum Conductors, Aluminum-Clad Steel Reinforced
derived in SI units.
B 549 Specification for Concentric-Lay-Stranded Alumi-
1.2.1 For density, resistivity, and temperature, the values
num Conductors, Aluminum-Clad Steel Reinforced
stated in SI units are to be regarded as standard.
2
(ACSR/AW)
1.3 ACSS/TW is designed to increase the aluminum area for
B 606 Specification for High-Strength Zinc-Coated (Galva-
a given diameter of conductor by the use of trapezoidal shaped
nized) Steel Core Wire for Aluminum and Aluminum-
wires (TW). The conductors consist of a central core of round
2
Alloy Conductors, Steel Reinforced
steel wire(s) surrounded by two or more layers of trapezoidal
B 609/B 609M Specification for Aluminum 1350 Round
aluminum 1350-0 wires. Different strandings of the same size
Wire, Annealed and Intermediate Tempers, for Electrical
of conductor are identified by type, which is the approximate
2
Purposes
ratio of steel area to aluminum area expressed in percent (see
B 779 Specification for Shaped Wire Compact Concentric-
Table 1, Table 2, and Table 3). For the purpose of this
Lay-Stranded Aluminum Conductors, Steel-Reinforced
specification, the sizes listed in Table 1 and Table 2 are
2
(ACSR/TW)
tabulated on the basis of the finished conductor having an area
B 802/B 802M Specification for Zinc-5 % Aluminum-
or outside diameter equal to that of specified sizes of standard
Mischmetal Alloy-Coated Steel Core Wire for Aluminum
ACSR, ACSS, and ACSR/TW so as to facilitate conductor
2
Conductors, Steel-Reinforced (ACSR)
selection.
B 803 Specification for High-Strength Zinc-5 %
2. Referenced Documents Aluminum-Mischmetal Alloy-Coated Steel Core Wire for
Aluminum and Aluminum-Alloy Conductors, Steel-
2.1 The following documents of the issue in effect on date
2
Reinforced
of material purchase form part of this specification to the extent
E 29 Practice for Using Significant Digits in Test Data to
referenced herein:
3
Determine Conformance with Specifications
2.2 ASTM Standards:
4
E 527 Practice for Numbering Metals and Alloys (UNS)
1
This specification is under the jurisdiction of ASTM Committee B01 on
Electrical Conductors and is the direct responsibility of Subcommittee B01.07
2
Conductors of Light Metals. Annual Book of ASTM Standards, Vol 02.03.
3
Current edition approved Oct. 10, 2001. Published November 2001. Originally Annual Book of ASTM Standards, Vol 14.02.
4
published as B 857 – 95. Last previous detion B 857 – 01. Annual Book of ASTM Standards, Vol 01.01.
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B 857
TABLE 1 Construction Requirements for Shaped Wire Compact Concentric-Lay-Stranded Aluminum
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