ASTM B228-98

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

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: 09-Apr-2002
• ICS: 29.060.20 - Cables
• Technical Committee: B01 - Electrical Conductors
• Drafting Committee: B01.06 - Bi-Metallic Conductors

Relations

• Replaced By: ASTM B228-02 - Standard Specification for Concentric-Lay-Stranded Copper-Clad Steel Conductors
• Effective Date: 10-Apr-2002

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NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn.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: B 228 – 98
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Specification for
1
Concentric-Lay-Stranded Copper-Clad Steel Conductors
This standard is issued under the fixed designation B 228; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 3.1.6 Package size (see 13.1),
3.1.7 Special package marking, if required (Section 12),
1.1 This specification covers bare concentric-lay-stranded
3.1.8 Lagging, if required (see 13.2), and
conductors made from bare round copper-clad steel wires for
3.1.9 Place of inspection (Section 14).
general use for electrical purposes.
3.2 In addition, Supplementary Requirements shall apply
1.2 For the purpose of this specification, conductors are
only when specified by the purchaser in the inquiry, contract, or
classified as follows: Grade 40 HS, Grade 30 HS, and Grade 30
purchase order for direct procurement by agencies of the U. S.
EHS.
Government (S1, S2, and S3).
1.3 The values stated in inch-pound units are to be regarded
as the standard. The values given in parentheses are in SI units.
4. Material for Wires
2. Referenced Documents 4.1 The purchaser shall specify the grade of wire to be used
in the conductor.
2.1 The following documents of the issue in effect on the
4.2 Before stranding, the copper-clad steel wire shall meet
date of material purchase form a part of this specification to the
all the requirements of Specification B 227.
extent referenced herein:
4.3 All wires in the conductor shall be of the same grade and
2.2 ASTM Standards:
quality.
B 227 Specification for Hard-Drawn Copper-Clad Steel
2
Wire
5. Joints
B 354 Terminology Relating to Uninsulated Metallic Elec-
2 5.1 Joints or splices may be made in the finished individual
trical Conductors
copper-clad steel wires composing concentric-lay-stranded
2.3 ANSI Standards:
3
conductors, using more than three wires provided that such
C 42 Definitions of Electrical Terms
joints or splices have a protection equivalent to that of the wire
2.4 National Institute of Standards and Technology:
4
itself and that they do not decrease the strength of the finished
NBS Handbook 100—Copper Wire Tables
stranded conductor below the minimum breaking strength
3. Ordering Information shown in Table 1. Such joints or splices shall be not closer than
50 ft (15 m) to any other joint in the same layer in the
3.1 Orders for material under this specification shall include
conductor (Note 1).
the following information:
3.1.1 Quantity of each size and grade,
NOTE 1—Joints or splices in individual copper-clad steel wires in their
3.1.2 Conductor size: approximate diameter in fractions of
finished size are made by electrical butt welding. Two types of joints are
used and are described as follows:
an inch, or number and AWG size of individual wires (Section
( a) Weld-Annealed Joints—After butt welding, the wire is annealed
7 and Table 1),
for a distance of approximately 5 in. (127 mm) on each side of the weld.
3.1.3 Grade (see 1.2 and Table 1),
The weld is then protected from corrosion with a snug fitting seamless
3.1.4 Direction of lay of outer layer, if other than left-hand
3
copper sleeve which extends at least ⁄8 in. (9.5 mm) on each side of the
(see 6.3),
weld and which is thoroughly sealed to the wire with solder. The wall
3.1.5 When physical tests shall be made (see 8.2),
thickness of the sleeve is at least 10 % of the radius of the wire.
This joint has a tensile strength of approximately 60 000 psi (415
MPa). This is less than the strength of the individual wires, but an
1
This specification is under the jurisdiction of ASTM Committee B-1 on
allowance is made for this in the rated strength of the conductor as a
Electrical Conductors and is the direct responsibility of Subcommittee B01.06 on
whole. The completed conductor when containing such joints is required
Composite Conductors.
to have the full rated strength.
Current edition approved March 10, 1998. Published September 1998. Originally
This type of joint is but slightly larger than the wire itself and is
published as B 228 – 48 T. Last previous edition B 228 – 93.
2
Annual Book of ASTM Standards, Vol 02.03. applicable for 7, 12, and 19-wire stranded conductors.
3
Available from American National Standards Institute, 11 W. 42nd St., 13th
( b) Compression-Weld Joints—Compression-weld joints differ from
Floor, New York, NY 10036.
weld-annealed joints in that the wire is not an
...