ASTM B857-11
(Specification)Standard Specification for Shaped Wire Compact Concentric-Lay-Stranded Aluminum Conductors, Coated-Steel Supported (ACSS/TW)
Standard Specification for Shaped Wire Compact Concentric-Lay-Stranded Aluminum Conductors, Coated-Steel Supported (ACSS/TW)
ABSTRACT
This specification covers shaped wire compact concentric-lay-stranded aluminum conductors, steel supported (ACSS/TW) for use as overhead electrical conductors. Electric-butt welds, cold-pressure welds, and electric-butt, cold upsed welds in the finished individual aluminum wires composing the conductor may be made during the stranding process. The electrical resistivity of the material shall meet the minimum resistivity specified. The rated strength of the completed conductor may be determined by mechanical tests. Mass and density of the conductors shall be determined.
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 units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.2.1 Exceptions—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. 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.
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Designation: B857 −11
StandardSpecification for
Shaped Wire Compact Concentric-Lay-Stranded Aluminum
1
Conductors, Coated-Steel Supported (ACSS/TW)
This standard is issued under the fixed designation B857; 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 (´) indicates an editorial change since the last revision or reapproval.
2
1. Scope 2.2 ASTM Standards:
B263 Test Method for Determination of Cross-Sectional
1.1 This specification covers shaped wire compact
Area of Stranded Conductors
concentric-lay-stranded aluminum conductors, steel supported
B354 Terminology Relating to Uninsulated Metallic Electri-
(ACSS/TW) for use as overhead electrical conductors (see
cal Conductors
Explanatory Note 1).
B498/B498M Specification for Zinc-Coated (Galvanized)
1.2 The values stated in inch-pound units are to be regarded
Steel Core Wire for Use in Overhead Electrical Conduc-
as standard. The values given in parentheses are mathematical
tors
conversions to SI units that are provided for information only
B500/B500M Specification for Metallic Coated or Alumi-
and are not considered standard.
num Clad Stranded Steel Core for Use in Overhead
1.2.1 Exceptions—For conductor sizes designated by AWG
Electrical Conductors
or kcmil sizes, the requirements in SI units are numerically
B502 Specification for Aluminum-Clad Steel Core Wire for
converted from the corresponding requirements in inch-pound
Use in Overhead Electrical Aluminum Conductors
units. For conductor sizes designated by SI units only, the
B549 Specification for Concentric-Lay-Stranded Aluminum
requirements are stated or derived in SI units. For density,
Conductors, Aluminum-Clad Steel Reinforced for Use in
resistivity, and temperature, the values stated in SI units are to
Overhead Electrical Conductors
be regarded as standard.
B606 Specification for High-Strength Zinc-Coated (Galva-
nized) Steel Core Wire for Aluminum and Aluminum-
1.3 ACSS/TWisdesignedtoincreasethealuminumareafor
a given diameter of conductor by the use of trapezoidal shaped Alloy Conductors, Steel Reinforced
B609/B609M Specification for Aluminum 1350 Round
wires (TW), or to reduce the diameter for a given area of
aluminum. The conductors consist of a central core of round Wire, Annealed and Intermediate Tempers, for Electrical
steel wire(s) surrounded by two or more layers of trapezoidal Purposes
B802/B802M Specification for Zinc–5 % Aluminum-
aluminum 1350-0 wires. Different strandings of the same size
of conductor are identified by type, which is the approximate Mischmetal Alloy-Coated Steel Core Wire for Aluminum
Conductors, Steel Reinforced (ACSR)
ratio of steel area to aluminum area expressed in percent (see
Table 1, Table 2, and Table 3). For the purpose of this B803 Specification for High-Strength Zinc–5 %Aluminum-
Mischmetal Alloy-Coated Steel Core Wire for Use in
specification, the sizes listed in Table 1 and Table 2 are
tabulated on the basis of the finished conductor having an area Overhead Electrical Conductors
B856 Specification for Concentric-Lay-Stranded Aluminum
or outside diameter equal to that of specified sizes of standard
ACSR, ACSS, and ACSR/TW so as to facilitate conductor Conductors, Coated Steel Supported (ACSS)
B957 Specification for Extra-High-Strength and Ultra-High-
selection.
Strength Zinc-Coated (Galvanized) Steel Core Wire for
2. Referenced Documents
Overhead Electrical Conductors
B958 Specification for Extra-High-Strength and Ultra-High-
2.1 The following documents of the issue in effect on date
Strength Class A Zinc–5% Aluminum-Mischmetal Alloy-
ofmaterialpurchaseformpartofthisspecificationtotheextent
Coated Steel Core Wire for Use in Overhead Electrical
referenced herein:
Conductors
E29 Practice for Using Significant Digits in Test Data to
1
This specification is under the jurisdiction of ASTM Committee B01 on
Electrical Conductors and is the direct responsibility of Subcommittee B01.07 on
2
Conductors of Light Metals. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved April 1, 2011. Published July 2011. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1995. Last previous edition approved in 2009 as B857 – 09. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/B0857-11. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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B857 − 11
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TABLE 1 Construction Requirements for Shaped Wire Compact Concentric-Lay-Stranded Aluminum Conductors, Coated Steel Supported
NOTE 1—Sized to ha
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This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:B857–09 Designation: B857 – 11
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 B857; 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 (´) indicates an editorial change since the last revision or reapproval.
1. 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 units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.2.1 Exceptions—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. 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), or to reduce the diameter for a given area of aluminum.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.
2. Referenced Documents
2.1 The following documents of the issue in effect on date of material purchase form part of this specification to the extent
referenced herein:
2
2.2 ASTM Standards: B232/B232MSpecification for Concentric-Lay-StrandedAluminum Conductors, Coated-Steel Reinforced
(ACSR)
B263 Test Method for Determination of Cross-Sectional Area of Stranded Conductors B341/B341MSpecification for
Aluminum-Coated (Aluminized)
Steel Core Wire forAluminum Con-
ductors, Steel Reinforced (ACSR/
AZ)
B354 Terminology Relating to Uninsulated Metallic Electrical Conductors
B498/B498M Specification for Zinc-Coated (Galvanized) Steel Core Wire for Use in Overhead Electrical Conductors
B500/B500M Specification for Metallic Coated Stranded Steel Core for Use in Overhead Electrical Conductors
B502 Specification for Aluminum-Clad Steel Core Wire for Use in Overhead Electrical Aluminum Conductors
B549 SpecificationforConcentric-Lay-StrandedAluminumConductors,Aluminum-CladSteelReinforcedforUseinOverhead
Electrical Conductors
B606 Specification for High-Strength Zinc-Coated (Galvanized) Steel Core Wire for Aluminum and Aluminum-Alloy
Conductors, Steel Reinforced
B609/B609M Specification for Aluminum 1350 Round Wire, Annealed and Intermediate Tempers, for Electrical Purposes
B779Specification for Shaped Wire Compact Concentric-Lay-Stranded Aluminum Conductors, Steel-Reinforced (ACSR/TW)
1
This specification is under the jurisdiction of ASTM Committee B01 on Electrical Conductors and is the direct responsibility of Subcommittee B01.07 on Conductors
of Light Metals.
Current edition approved April 1, 2009.2011. Published May 2009.July 2011. Originally approved in 1995. Last previous edition approved in 20022009 as B857 – 029.
DOI: 10.1520/B0857-09.10.1520/B0857-11.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
B857 – 11
2
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TABLE 1 Construction Requirements for Shaped Wire Compact C
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