ASTM B701/B701M-22e1

Standard Specification for Concentric-Lay-Stranded Self-Damping Aluminum Conductors, Steel Reinforced (ACSR/SD)

ABSTRACT
This specification covers concentric-lay-stranded self-damping aluminum conductors, steel-reinforced, and its component wires for use as overhead electrical conductors. The tensile strength and elongation requirements of the round and trapezoidal wires shall be the same except for the shape and diameter tolerance. Joints shall not be made in the finished steel wires. The lay factor and direction are specified. The strength and electrical resistance of a complete conductor are calculated. Tests for mechanical and electrical properties of aluminum and steel core wires shall be made before stranding. Gap dimensions shall be measured during fabrication of the conductor.
SCOPE
1.1 This specification covers concentric-lay-stranded self-damping aluminum conductor, steel-reinforced (ACSR/SD), and its component wires for use as overhead electrical conductors (Explanatory Notes 1 and 2).  
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, 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.
Note 1: ACSR/SD is designed to control aeolian vibration by integral damping. The conductors consist of a central core of a round steel wire or wires surrounded by two layers of trapezoidal aluminum 1350-H19 wires or two layers of trapezoidal aluminum 1350-H19 wires and one layer of round aluminum 1350-H19 wires (Fig. 1). The trapezoidal-wire layers are separated from each other and from the steel core by two small annular gaps that provide the conductors self-damping characteristics. The round aluminum wires are in tight layer contact between themselves and the underlying trapezoidal wire layer. 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 (Table 1 and Table 2).  
FIG. 1 Illustrations of Typical ACSR/SD Strandings
Note 2: The aluminum and temper designations conform to ANSI Standard H 35.1. Aluminum 1350 corresponds to UNS A91350 in accordance with Practice E527.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 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.

General Information

• Status: Published
• Publication Date: 30-Nov-2022
• ICS: 29.240.20 - Power transmission and distribution lines
• Technical Committee: B01 - Electrical Conductors
• Drafting Committee: B01.07 - Conductors of Light Metals

Standards Content (Sample)

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.
´1
Designation: B701/B701M −22
Standard Specification for
Concentric-Lay-Stranded Self-Damping Aluminum
1
Conductors, Steel Reinforced (ACSR/SD)
This standard is issued under the fixed designation B701/B701M; 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
ε NOTE—Added publication information to Footnote 1 editorially in January 2023.
1. Scope 1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard-
1.1 This specification covers concentric-lay-stranded self-
ization established in the Decision on Principles for the
damping aluminum conductor, steel-reinforced (ACSR/SD),
Development of International Standards, Guides and Recom-
and its component wires for use as overhead electrical conduc-
mendations issued by the World Trade Organization Technical
tors (Explanatory Notes 1 and 2).
Barriers to Trade (TBT) Committee.
1.2 The values stated in inch-pound or SI units are to be
regarded separately as standard. Each system shall be used
2. Referenced Documents
independently of the other. Combining values from the two
2.1 The following documents of the issue in effect on date
systems may result in non-conformance with the specification.
of material purchase form a part of this specification to the
For conductor sizes designated byAWG or kcmil, the require-
extent referenced herein.
ments in SI units have been numerically converted from
2
correspondingvaluesstatedorderivedininch-poundunits.For 2.2 ASTM Standards:
B230/B230M Specification for Aluminum 1350–H19 Wire
conductor sizes designated by SI units only, the requirements
are stated or derived in SI units. for Electrical Purposes
B232/B232M Specification for Concentric-Lay-Stranded
1.2.1 For density, resistivity, and temperature, the values
stated in SI units are to be regarded as standard. Aluminum Conductors, Coated-Steel Reinforced (ACSR)
B263/B263M Test Method for Determination of Cross-
NOTE 1—ACSR/SD is designed to control aeolian vibration by integral
Sectional Area of Stranded Conductors
damping. The conductors consist of a central core of a round steel wire or
B354 Terminology Relating to Uninsulated Metallic Electri-
wires surrounded by two layers of trapezoidal aluminum 1350-H19 wires
or two layers of trapezoidal aluminum 1350-H19 wires and one layer of
cal Conductors
round aluminum 1350-H19 wires (Fig. 1). The trapezoidal-wire layers are
B498/B498M Specification for Zinc-Coated (Galvanized)
separated from each other and from the steel core by two small annular
Steel Core Wire for Use in Overhead Electrical Conduc-
gaps that provide the conductors self-damping characteristics. The round
tors
aluminum wires are in tight layer contact between themselves and the
underlying trapezoidal wire layer. Different strandings of the same size of B500/B500M Specification for Metallic Coated or Alumi-
conductor are identified by type, which is the approximate ratio of steel
num Clad Stranded Steel Core for Use in Overhead
area to aluminum area, expressed in percent (Table 1 and Table 2).
Electrical Conductors
NOTE 2—The aluminum and temper designations conform to ANSI
B502/B502M Specification for Aluminum-Clad Steel Core
Standard H 35.1. Aluminum 1350 corresponds to UNS A91350 in
Wire for Use in Overhead Electrical Aluminum Conduc-
accordance with Practice E527.
tors
1.3 This standard does not purport to address all of the
B549 Specification for Concentric-Lay-Stranded Aluminum
safety concerns, if any, associated with its use. It is the
Conductors, Aluminum-Clad Steel Reinforced for Use in
responsibility of the user of this standard to establish appro-
Overhead Electrical Conductors
priate safety, health, and environmental practices and deter-
B606/B606M Specification for High-Strength Zinc-Coated
mine the applicability of regulatory limitations prior to use.
(Galvanized) Steel Core Wire for Aluminum and
Aluminum-Alloy Conductors, Steel Reinforced
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 Dec. 1, 2022. Published December 2022. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 1981. Last previous edition approved in 2018 as B701/B701M – 13 Standards volume information, refer
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