ASTM B231/B231M-12

Standard Specification for Concentric-Lay-Stranded Aluminum 1350 Conductors

ABSTRACT
This specification covers aluminum 1350-H19, 1350-H16 or -H26, 1350-H14 or -H24, and 1350-H142 or -H242, bare concentric-lay-stranded conductors constructed with a straight round central wire surrounded by one or more layers of helically layered wires. Conductors are classified as Class AA for bare conductors usually used in overhead lines; Class A for conductors to be covered with weather resistant materials, and for bare conductors where greater flexibility than is afforded by Class AA is required; Class B for conductors to be insulated with various materials such as rubber, paper, varnished cloth, and so forth, and for the conductors indicated under Class A where greater flexibility is required; and Classes C and D for conductors where greater flexibility is required than is provided by Class B conductors. Aluminum wire employed in Classes AA and A conductors shall be 1350-H19, unless otherwise specified. The temper of conductors of Classes B, C and D shall be designated. The direction of lay of the outer layer shall be right-hand for Classes AA and A and left-hand for other classes. The various classes of concentric-lay-stranded conductors shall conform to the required areas of cross section, numbers, and diameters of wires. The rated strength of 1350-H19 conductors shall be taken as the percent of the sum of the strengths of the component wires, calculated using the nominal wire diameters and the specified minimum average tensile strength given in Specification B 230/B 230M for 1350-H19 wire.
SCOPE
1.1 This specification covers aluminum 1350-H19 (extra hard), 1350-H16 or -H26 (3/4 hard), 1350-H14 or -H24 (1/2 hard), and 1350-H142 or -H242 (1/2 hard), bare concentric-lay-stranded conductors constructed with a straight round central wire surrounded by one or more layers of helically layed wires. The conductors are for general use for electrical purposes (Explanatory Note 1 and Note 2).  
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.  
1.2.1 For density, resistivity and temperature, the values stated in SI units are to be regarded as standard.Note 1—Prior to 1975, aluminum 1350 was designated as EC aluminum.Note 2—The aluminum and temper designations conform to ANSI Standard H35.1/H35.1M. Aluminum 1350 corresponds to Unified Numbering System A91350 in accordance with Practice E527. Note 3—Sealed conductors that are intended to prevent longitudinal water propagation and are further covered/insulated are also permitted within the guidelines of this specification.

General Information

• Status: Historical
• Publication Date: 31-May-2012
• ICS: 29.240.20 - Power transmission and distribution lines
• Technical Committee: B01 - Electrical Conductors
• Drafting Committee: B01.07 - Conductors of Light Metals

Relations

• Replaces: ASTM B231/B231M-11 - Standard Specification for Concentric-Lay-Stranded Aluminum 1350 Conductors
• Effective Date: 01-Jun-2012
• Referred By: ASTM B1006-17 - Standard Specification for Electrical Overhead Conductor Code Word Names
• Effective Date: 01-Jun-2012
• Referred By: ASTM B400/B400M-19 - Standard Specification for Compact Round Concentric-Lay-Stranded Aluminum 1350 Conductors
• Effective Date: 01-Jun-2012

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: B231/B231M −12
StandardSpecification for
1
Concentric-Lay-Stranded Aluminum 1350 Conductors
This standard is issued under the fixed designation B231/B231M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope for Electrical Purposes
B263Test Method for Determination of Cross-Sectional
1.1 This specification covers aluminum 1350-H19 (extra
Area of Stranded Conductors
3 1
hard), 1350-H16 or -H26 ( ⁄4 hard), 1350-H14 or -H24 ( ⁄2
B354Terminology Relating to Uninsulated Metallic Electri-
1
hard), and 1350-H142 or -H242 ( ⁄2 hard), bare concentric-lay-
cal Conductors
stranded conductors constructed with a straight round central
B609/B609M Specification for Aluminum 1350 Round
wiresurroundedbyoneormorelayersofhelicallylayedwires.
Wire, Annealed and Intermediate Tempers, for Electrical
The conductors are for general use for electrical purposes
Purposes
(Explanatory Note 1 and Note 2).
B682SpecificationforMetricSizesofElectricalConductors
1.2 The values stated in either SI units or inch-pound units
E29Practice for Using Significant Digits in Test Data to
are to be regarded separately as standard. The values stated in
Determine Conformance with Specifications
each system may not be exact equivalents; therefore, each
E527Practice for Numbering Metals and Alloys in the
system shall be used independently of the other. Combining
Unified Numbering System (UNS)
values from the two systems may result in non-conformance 3
2.3 ANSI Documents:
with the standard.
ANSI H35.1American National StandardAlloy andTemper
1.2.1 For density, resistivity and temperature, the values
Designation System for Aluminum
stated in SI units are to be regarded as standard.
ANSI H35.1M American National Standard Alloy and
Temper Designation Systems for Aluminum [Metric]
NOTE 1—Prior to 1975, aluminum 1350 was designated as EC
4
aluminum.
2.4 NIST Document:
NOTE 2—The aluminum and temper designations conform to ANSI
NBS Handbook 100—Copper Wire Tables
Standard H35.1/H35.1M. Aluminum 1350 corresponds to Unified Num-
5
2.5 Aluminum Association Document:
bering System A91350 in accordance with Practice E527.
NOTE 3—Sealed conductors that are intended to prevent longitudinal Publication 50,Code Words for Overhead Aluminum Elec-
water propagation and are further covered/insulated are also permitted
trical Conductors
within the guidelines of this specification.
3. Classification
2. Referenced Documents
3.1 For the purpose of this specification, conductors are
2.1 The following documents of the issue in effect on date
classified as follows (Explanatory Note 1 and Note 2):
of material purchase form a part of this specification to the
3.1.1 Class AA—For bare conductors usually used in over-
extent referenced herein:
head lines.
2
2.2 ASTM Standards:
3.1.2 Class A—For conductors to be covered with weather-
B193Test Method for Resistivity of Electrical Conductor
resistant materials, and for bare conductors where greater
Materials
flexibilitythanisaffordedbyClassAAisrequired.Conductors
B230/B230MSpecification for Aluminum 1350–H19 Wire
intendedforfurtherfabricationintotreewireortobeinsulated
and laid helically with or around aluminum or ACSR
messengers, shall be regarded as Class A conductors with
1
This specification is under the jurisdiction of ASTM Committee B01 on
respect to direction of lay only (see 7.4).
Electrical Conductors and is the direct responsibility of Subcommittee B01.07 on
Conductors of Light Metals.
Current edition approved June 1, 2012. Published October 2012. Originally
3
approved in 1948. Last previous edition approved in 2011 as B231/B231M–11. Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
DOI: 10.1520/B0231_B0231M-12. 4th Floor, New York, NY 10036.
2 4
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from National Technical Information Service (NTIS), U.S. Depart-
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM ment of Commerce, 5285 Port Royal Rd., Springfield, VA 22161.
5
Standards volume information, refer to the standard’s Document Summary page on Available from the Aluminum Association, Inc., 900 19th Street, NW, Suite
the ASTM website. 300, Washington, DC 20006.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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B231/B231M − 12
3.1.3 Class B—For conductors to be insulated with various 7. Lay
materials such as rubber, paper, varnished
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM 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: B231/B231M − 11 B231/B231M − 12
Standard Specification for
1
Concentric-Lay-Stranded Aluminum 1350 Conductors
This standard is issued under the fixed designation B231/B231M; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope
3 1
1.1 This specification covers aluminum 1350-H19 (extra hard), 1350-H16 or -H26 ( ⁄4 hard), 1350-H14 or -H24 ( ⁄2 hard), and
1
1350-H142 or -H242 ( ⁄2 hard), bare concentric-lay-stranded conductors constructed with a straight round central wire surrounded
by one or more layers of helically layed wires. The conductors are for general use for electrical purposes (Explanatory Note 1 and
Note 2).
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the
two systems may result in non-conformance with the standard.
1.2.1 For density, resistivity and temperature, the values stated in SI units are to be regarded as standard.
NOTE 1—Prior to 1975, aluminum 1350 was designated as EC aluminum.
NOTE 2—The aluminum and temper designations conform to ANSI Standard H35.1/H35.1M. Aluminum 1350 corresponds to Unified Numbering
System A91350 in accordance with Practice E527.
NOTE 3—Sealed conductors that are intended to prevent longitudinal water propagation and are further covered/insulated are also permitted within the
guidelines of this specification.
2. Referenced Documents
2.1 The following documents of the issue in effect on date of material purchase form a part of this specification to the extent
referenced herein:
2
2.2 ASTM Standards:
B193 Test Method for Resistivity of Electrical Conductor Materials
B230/B230M Specification for Aluminum 1350–H19 Wire for Electrical Purposes
B263 Test Method for Determination of Cross-Sectional Area of Stranded Conductors
B354 Terminology Relating to Uninsulated Metallic Electrical Conductors
B609/B609M Specification for Aluminum 1350 Round Wire, Annealed and Intermediate Tempers, for Electrical Purposes
B682 Specification for Metric Sizes of Electrical Conductors
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
3
2.3 ANSI Documents:
ANSI H35.1 American National Standard Alloy and Temper Designation System for Aluminum
ANSI H35.1M American National Standard Alloy and Temper Designation Systems for Aluminum [Metric]
4
2.4 NIST Document:
NBS Handbook 100—Copper Wire Tables
5
2.5 Aluminum Association Document:
Publication 50, Code Words for Overhead Aluminum Electrical Conductors
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, 2011June 1, 2012. Published May 2011October 2012. Originally approved in 1948. Last previous edition approved in 20042011 as
B231/B231M – 04.B231/B231M – 11. DOI: 10.1520/B0231_B0231M-11.10.1520/B0231_B0231M-12.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036.
4
Available from National Technical Information Service (NTIS), U.S. Department of Commerce, 5285 Port Royal Rd., Springfield, VA 22161.
5
Available from the Aluminum Association, Inc., 900 19th Street, NW, Suite 300, Washington, DC 20006.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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B231/B231M − 12
3. Classification
3.1 For the purpose of this specification, conductors are classified as follows (Explanatory Note 1 and Note 2):
3.1.1 Class AA—For bare conductors usually used in overhead lines.
3.1.2 Class A—For conductors to be covered with weather-resistant materials, and for bare conductors whe
...