ASTM B226-11

Standard Specification for Cored, Annular, Concentric-Lay-Stranded Copper Conductors

ABSTRACT
This specification covers cored, annular, concentric-lay-stranded conductors made from round soft copper wires either uncoated or coated with tin for use as electrical conductors. The core may be of any materials and its size and surface firmness as a base for the overlaid wires shall be adequated to prevent forcing or dropping of any wire out of its layer position. No splice shall be made in the conductor as a whole, welds or brazes may be made in the finished individual wires. The materials shall conform to the required nominal conductor size, number of layers of wires, number, diameter, lay-up wires, approximate core diameter, and maximum conductor diameter. The mass per unit length and electrical resistance of a unit length of stranded conductor are a function of the length of lay and shall be calculated. The are of cross section of a conductor shall be considered to be the sum of the cross-sectional areas of its component wires at any section when measured perpendicularly to their individual axes.
SCOPE
1.1 This specification covers cored, annular, concentric-lay-stranded conductors made from round soft copper wires, either uncoated or coated with tin for use as electrical conductors (Explanatory Note 1 and Note 2).
1.2 The constructions prescribed herein are suitable for bare conductors, or for conductors to be covered with weather-resistant (weather-proof) material, or for conductors to be insulated with rubber, varnished cloth, or impregnated paper, except types such as “oil-filled” or “gas-filled” (Explanatory Note 3).
1.3 Cored, annular conductor constructions not included in this specification shall be specifically agreed upon between the manufacturer and the purchaser when placing the order.
1.4 These constructions are not recommended for use as electric furnace leads where great flexibility is required and special conductor designs are indicated in consideration of the particular service requirements.
1.5 The SI values for density are regarded as the standard. For all other properties the inch-pound values are to be regarded as standard and the SI units may be approximate.

General Information

• Status: Historical
• Publication Date: 31-Mar-2011
• Technical Committee: B01 - Electrical Conductors
• Drafting Committee: B01.04 - Conductors of Copper and Copper Alloys

Relations

• Replaces: ASTM B226-04 - Standard Specification for Cored, Annular, Concentric-Lay-Stranded Copper Conductors
• Effective Date: 01-Apr-2011

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: B226 −11
StandardSpecification for
Cored, Annular, Concentric-Lay-Stranded Copper
1
Conductors
This standard is issued under the fixed designation B226; 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 Wire for Electrical Purposes
B172 Specification for Rope-Lay-Stranded Copper Conduc-
1.1 This specification covers cored, annular, concentric-lay-
torsHavingBunch-StrandedMembers,forElectricalCon-
stranded conductors made from round soft copper wires, either
ductors
uncoated or coated with tin for use as electrical conductors
B173 Specification for Rope-Lay-Stranded Copper Conduc-
(Explanatory Note 1 and Note 2).
tors Having Concentric-Stranded Members, for Electrical
1.2 The constructions prescribed herein are suitable for bare
Conductors
conductors, or for conductors to be covered with weather-
B174 Specification for Bunch-Stranded Copper Conductors
resistant (weather-proof) material, or for conductors to be
for Electrical Conductors
insulated with rubber, varnished cloth, or impregnated paper,
B263 Test Method for Determination of Cross-Sectional
except types such as “oil-filled” or “gas-filled” (Explanatory
Area of Stranded Conductors
Note 3).
B354 Terminology Relating to Uninsulated Metallic Electri-
1.3 Cored, annular conductor constructions not included in cal Conductors
B496 Specification for Compact Round Concentric-Lay-
this specification shall be specifically agreed upon between the
manufacturer and the purchaser when placing the order. Stranded Copper Conductors
B784 Specification for Modified Concentric-Lay-Stranded
1.4 These constructions are not recommended for use as
Copper Conductors for Use in Insulated Electrical Cables
electric furnace leads where great flexibility is required and
B787/B787M Specification for 19 Wire Combination
special conductor designs are indicated in consideration of the
Unilay-Stranded Copper Conductors for Subsequent Insu-
particular service requirements.
lation
1.5 The SI values for density are regarded as the standard.
B835 Specification for Compact Round Stranded Copper
For all other properties the inch-pound values are to be
Conductors Using Single Input Wire Construction
regarded as standard and the SI units may be approximate.
B902 Specification for Compressed Round Stranded Copper
Conductors, Hard, Medium-Hard, or Soft Using Single
2. Referenced Documents
Input Wire Construction
2.1 The following documents in effect at the time of
2.3 American National Standard:
reference form a part of these methods to the extent referenced
IEEE Standard 100 The Authoritative Dictionary of IEEE
herein: 3
Standards Terms
2
2.2 ASTM Standards:
2.4 NIST:
4
B3 Specification for Soft or Annealed Copper Wire
NBS Handbook 100—Copper Wire Tables
B8 Specification for Concentric-Lay-Stranded Copper
Conductors, Hard, Medium-Hard, or Soft
3. Ordering Information
B33 Specification for Tin-Coated Soft or Annealed Copper
3.1 Orders for material under this specification shall include
the following information:
3.1.1 Quantity of each size,
1
This specification is under the jurisdiction of ASTM Committee B01 on
Electrical Conductors and is the direct responsibility of Subcommittee B01.04 on 3.1.2 Conductor size: circular-mil area (Section 7 and Table
Conductors of Copper and Copper Alloys.
1),
Current edition approved April 1, 2011. Published May 2011. Originally
approved in 1948. Last previous edition approved in 2004 as B226 – 04. DOI:
10.1520/B0226-11.
2 3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM 4th Floor, New York, NY 10036, http://www.ansi.org.
4
Standards volume information, refer to the standard’s Document Summary page on Available from National Technical Information Service (NTIS), 5301 Shawnee
the ASTM website. Rd., Alexandria, VA 22312, http://www.ntis.gov.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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B226 − 11
TABLE 1 Construction of Cored, Annular, Concentric-Lay-Stranded Copper Conductors
Nominal Area of Number of Strands in Layers
Approximate Calculated Area of Maximum
Copper Diameter of
A
Diameter of Copper, Cross Outside Diameter,
Cross Wires, in.
Core, in. Section, cmils in.
1st 2nd 3rd Total
Section, cmils
5 000 000 2.875 0.1620 57 63 69 189 4 960 116 3.897
4 500 000 2.500 0.1620 50 56 62 168 4 408 992 3.517
4 000 000 2.250 0.1620 45 51 57 153 4 015 332 3.26
...

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:B226–04 Designation: B226 – 11
Standard Specification for
Cored, Annular, Concentric-Lay-Stranded Copper
1
Conductors
This standard is issued under the fixed designation B226; 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 cored, annular, concentric-lay-stranded conductors made from round soft copper wires, either
uncoated or coated with tin for use as electrical conductors (Explanatory Note 1 and Note 2).
1.2 The constructions prescribed herein are suitable for bare conductors, or for conductors to be covered with weather-resistant
(weather-proof) material, or for conductors to be insulated with rubber, varnished cloth, or impregnated paper, except types such
as “oil-filled” or “gas-filled” (Explanatory Note 3).
1.3 Cored, annular conductor constructions not included in this specification shall be specifically agreed upon between the
manufacturer and the purchaser when placing the order.
1.4 These constructions are not recommended for use as electric furnace leads where great flexibility is required and special
conductor designs are indicated in consideration of the particular service requirements.
1.5 The SI values for density are regarded as the standard. For all other properties the inch-pound values are to be regarded as
standard and the SI units may be approximate.
2. Referenced Documents
2.1 The following documents in effect at the time of reference form a part of these methods to the extent referenced herein:
2
2.2 ASTM Standards:
B3 Specification for Soft or Annealed Copper Wire
B8 Specification for Concentric-Lay-Stranded Copper Conductors, Hard, Medium-Hard, or Soft
B33 Specification for Tin-Coated Soft or Annealed Copper Wire for Electrical Purposes
B172 Specification for Rope-Lay-Stranded Copper Conductors Having Bunch-Stranded Members, for Electrical Conductors
B173 Specification for Rope-Lay-Stranded Copper Conductors Having Concentric-Stranded Members, for Electrical Conduc-
tors
B174 Specification for Bunch-Stranded Copper Conductors for Electrical Conductors
B263 Test Method for Determination of Cross-Sectional Area of Stranded Conductors
B354 Terminology Relating to Uninsulated Metallic Electrical Conductors
B496 Specification for Compact Round Concentric-Lay-Stranded Copper Conductors
B784 Specification for Modified Concentric-Lay-Stranded Copper Conductors for Use in Insulated Electrical Cables
B785Specification for Compact Round Modified Concentric-Lay-Stranded Copper Conductors for Use in Insulated Electrical
Cables(Discontinued 1998)
B787/B787M Specification for 19 Wire Combination Unilay-Stranded Copper Conductors for Subsequent Insulation
B835 Specification for Compact Round Stranded Copper Conductors Using Single Input Wire Construction
B902 Specification for Compressed Round Stranded Copper Conductors, Hard, Medium-Hard, or Soft Using Single InputWire
Construction
2.3 American National Standard:
3
ANSI C42.35Definitions of Electrical Terms IEEE Standard 100 The Authoritative Dictionary of IEEE Standards Terms
2.4 NIST:
1
This specification is under the jurisdiction of ASTM Committee B01 on Electrical Conductors and is the direct responsibility of Subcommittee B01.04 on Conductors
of Copper and Copper Alloys.
Current edition approved April 1, 2004.2011. Published April 2004.May 2011. Originally approved in 1948. Last previous edition approved in 19952004as
B226–95.B226 – 04. DOI: 10.1520/B0226-04.10.1520/B0226-11.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. ForAnnualBookofASTMStandards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Withdrawn.
3
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

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B226 – 11
4
NBS Handbook 100—Copper Wire Tables
3. Ordering Information
3.1 Orders for material under this specification shall include the following information:
3.1.1 Quantity of each size,
3.1.2 Conductor size: circular-mil area (Section 7 and Table 1),
3.1.3 Whether coated or uncoated; if coated, designate type
...