ASTM B857-01

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Designation: B 857 – 01
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 Specification for Aluminum-Coated (Aluminized)
Explanatory Note 1).
Steel Core Wire for Aluminum Conductors, Steel Rein-
1.2 The values stated in inch-pound or SI units are to be
2
forced (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 Specification for Zinc-Coated (Galvanized) Steel
For conductor sizes designated by AWG or kcmil sizes, the
Core Wire for Aluminum Conductors, Steel Reinforced
requirements in SI units are numerically converted from the
2
(ACSR)
corresponding requirements in inch-pound units. For conductor
B 500 Specification for Metallic Coated Stranded Steel
sizes designation by AWG or kcmil, the requirements in SI
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 Specification for Aluminum 1350 Round Wire, An-
aluminum 1350-0 wires. Different strandings of the same size
2
nealed and Intermediate Temper, for Electrical Purposes
of conductor are identified by type, which is the approximate
B 779 Specification for Shaped Wire Compact Concentric-
ratio of steel area to aluminum area expressed in percent (see
Lay-Stranded Aluminum Conductors, Steel-Reinforced
Table 1, Table 2, and Table 3). For the purpose of this
2
(ACSR/TW)
specification, the sizes listed in Table 1 and Table 2 are
B 802 Specification for Zinc-5 % Aluminum-Mischmetal
tabulated on the basis of the finished conductor having an area
Alloy-Coated Steel Core Wire for Aluminum Conductors,
or outside diameter equal to that of specified sizes of standard
2
Steel-Reinforced (ACSR)
ACSR, ACSS, and ACSR/TW so as to facilitate conductor
B 803 Specification for High-Strength Zinc-5 %
selection.
Aluminum-Mischmetal Alloy-Coated Steel Core Wire for
2. Referenced Documents Aluminum and Aluminum-Alloy Conductors, Steel-
2
Reinforced
2.1 The following documents of the issue in effect on date
E 29 Practice for Using Significant Digits in Test Data to
of material purchase form part of this specification to the extent
3
Determine Conformance with Specifications
referenced herein:
4
E 527 Practice for Numbering Metals and Alloys (UNS)
2.2 ASTM Standards:
2.3 Other Standards:
1
This specification is under the jurisdiction of ASTM Committee B01 on
2
Electrical Conductors and is the direct responsibility of Subcommittee B01.07 Annual Book of ASTM Standards, Vol 02.03.
3
Conductors of Light Metals. Annual Book of ASTM Standards, Vol 14.02.
4
Current edition approved Mar. 10, 2001. Published May 2001. 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 Conductors, Coated Steel
A
Supported
NOTE 1—Sized to have area equal to ACSR or ACSS, Clas
...