ASTM B228-04

Standard Specification for Concentric-Lay-Stranded Copper-Clad Steel Conductors

ABSTRACT
This specification covers bare concentric-lay-stranded conductors made from bare round copper-clad steel wires for general use for electrical purposes. Conductors are classified as follows: Grade 40 HS, Grade 30 HS, and Grade 30 EHS. The numbers and diameters of the wires in the concentric-lay-stranded conductors shall conform to the requirements prescribed. Tests for physical and electrical properties of wires composing concentric-lay-stranded conductors made from copper-clad steel wire shall be made before stranding.
SCOPE
1.1 This specification covers bare concentric-lay-stranded conductors made from bare round copper-clad steel wires for general use for electrical purposes.  
1.2 For the purpose of this specification, conductors are classified as follows: Grade 40 HS, Grade 30 HS, and Grade 30 EHS.  
1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.

General Information

• Status: Historical
• Publication Date: 31-Mar-2004
• ICS: 29.060.20 - Cables
• Technical Committee: B01 - Electrical Conductors
• Drafting Committee: B01.06 - Bi-Metallic Conductors

Relations

• Replaces: ASTM B228-02 - Standard Specification for Concentric-Lay-Stranded Copper-Clad Steel Conductors
• Effective Date: 01-Apr-2004
• Replaced By: ASTM B228-11 - Standard Specification for Concentric-Lay-Stranded Copper-Clad Steel 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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: B228 – 04
Standard Specification for
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Concentric-Lay-Stranded Copper-Clad Steel Conductors
This standard is issued under the fixed designation B228; 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 3.1.3 Grade (see 1.2 and Table 1);
3.1.4 Direction of lay of outer layer, if other than left-hand
1.1 This specification covers bare concentric-lay-stranded
(see 6.3);
conductors made from bare round copper-clad steel wires for
3.1.5 When physical tests shall be made (see 8.2);
general use for electrical purposes.
3.1.6 Package size (see 13.1);
1.2 For the purpose of this specification, conductors are
3.1.7 Special package marking, if required (Section 12);
classifiedasfollows:Grade40HS,Grade30HS,andGrade30
3.1.8 Lagging, if required (see 13.2); and
EHS.
3.1.9 Place of inspection (Section 14).
1.3 The values stated in inch-pound units are to be regarded
3.2 In addition, Supplementary Requirements shall apply
as the standard.The values given in parentheses are in SI units.
onlywhenspecifiedbythepurchaserintheinquiry,contract,or
2. Referenced Documents
purchase order for direct procurement by agencies of the U. S.
Government (S1, S2, and S3).
2.1 The following documents of the issue in effect on the
dateofmaterialpurchaseformapartofthisspecificationtothe
4. Material for Wires
extent referenced herein:
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4.1 The purchaser shall specify the grade of wire to be used
2.2 ASTM Standards:
in the conductor.
B227 Specification for Hard-Drawn Copper-Clad Steel
4.2 Before stranding, the copper-clad steel wire shall meet
Wire
all the requirements of Specification B227.
B354 Terminology Relating to Uninsulated Metallic Elec-
4.3 Allwiresintheconductorshallbeofthesamegradeand
trical Conductors
quality.
2.3 ANSI Standards:
3
C 42 Definitions of Electrical Terms
5. Joints
2.4 National Institute of Standards and Technology:
4 5.1 Joints or splices may be made in the finished individual
NBS Handbook 100—Copper Wire Tables
copper-clad steel wires composing concentric-lay-stranded
3. Ordering Information conductors, using more than three wires provided that such
joints or splices have a protection equivalent to that of the wire
3.1 Orders for material under this specification shall include
itself and that they do not decrease the strength of the finished
the following information:
stranded conductor below the minimum breaking strength
3.1.1 Quantity of each size and grade;
shown inTable 1. Such joints or splices shall be not closer than
3.1.2 Conductor size: approximate diameter in fractions of
50 ft (15 m) to any other joint in the same layer in the
an inch, or number andAWG size of individual wires (Section
conductor (Note 1).
7 and Table 1);
NOTE 1—Joints or splices in individual copper-clad steel wires in their
1 finished size are made by electrical butt welding. Two types of joints are
This specification is under the jurisdiction of ASTM Committee B01 on
used and are described as follows:
Electrical Conductors and is the direct responsibility of Subcommittee B01.06 on
Composite Conductors. (a) Weld-AnnealedJoints—Afterbuttwelding,thewireisannealedfor
Current edition approved April 1, 2004. Published April 2004. Originally
a distance of approximately 5 in. (127 mm) on each side of the weld. The
approved in 1948. Last previous edition approved in 2002 as B228 – 02. DOI:
weld is then protected from corrosion with a snug fitting seamless copper
10.1520/B0228-04. 3
sleeve which extends at least ⁄8 in. (9.5 mm) on each side of the weld and
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
which is thoroughly sealed to the wire with solder. The wall thickness of
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
the sleeve is at least 10 % of the radius of the wire.
Standards volume information, refer to the standard’s Document Summary page on
Thisjointhasatensilestrengthofapproximately60 000psi(415MPa).
the ASTM website.
3
This is less than the strength of the individual wires, but an allowance is
Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
made for this in the rated strength of the conductor as a whole. The
4th Floor, New York, NY 10036.
4
completed conductor when containing such joints is required to have the
Available from National Institute of Standards and Technology (NIST), 100
Bureau Dr., Stop 3460, Gaithersburg, MD 20899-3460.
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