ASTM B496-01

Standard Specification for Compact Round Concentric-Lay-Stranded Copper Conductors

SCOPE
1.1 This specification covers bare compact round concentric-lay-stranded conductors made from uncoated round copper wires for general use for electrical purposes. These conductors shall be constructed with a central core surrounded by one or more layers of helically laid compacted wires (Explanatory Note 1 and Note 2).
1.2 The values stated in inch-pound or SI units are to be regarded separately as standard. The values in each system are not exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.
1.2.1 For density, resistivity, and temperature, the values stated in SI units are to be regarded as standard.

General Information

• Status: Historical
• Publication Date: 09-Mar-2001
• ICS: 29.240.20 - Power transmission and distribution lines
• Technical Committee: B01 - Electrical Conductors
• Drafting Committee: B01.04 - Conductors of Copper and Copper Alloys

Relations

• Replaces: ASTM B496-99 - Standard Specification for Compact Round Concentric-Lay-Stranded Copper Conductors
• Effective Date: 10-Mar-2001
• Replaced By: ASTM B496-04 - Standard Specification for Compact Round Concentric-Lay-Stranded Copper Conductors
• Effective Date: 01-Apr-2004
• Referred By: ASTM B226-11(2021) - Standard Specification for Cored, Annular, Concentric-Lay-Stranded Copper Conductors
• Effective Date: 10-Mar-2001

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 496 – 01
Standard Specification for
Compact Round Concentric-Lay-Stranded Copper
1
Conductors
This standard is issued under the fixed designation B 496; 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.
1. Scope 4. Joints
1.1 This specification covers bare compact round 4.1 Welds and brazes may be made in rods or in wires prior
concentric-lay-stranded conductors made from uncoated round to final drawing.
copper wires for general use for electrical purposes. These 4.2 Welds and brazes may be made in the individual round
conductors shall be constructed with a central core surrounded drawn wires for compact conductors, but shall not be closer
by one or more layers of helically laid compacted wires together than 1 ft (300 mm) for conductor of 19 wires or less
(Explanatory Note 1 and Note 2). or closer than 1 ft (300 mm) in a layer for conductor of more
1.2 The values stated in inch-pound or SI units are to be than 19 wires.
regarded separately as standard. The values in each system are 4.3 No joint nor splice shall be made in a compact-stranded
not exact equivalents; therefore, each system shall be used conductor as a whole.
independently of the other. Combining values from the two
5. Lay
systems may result in nonconformance with the specification.
5.1 The length of lay shall be not less than 8 nor more than
1.2.1 For density, resistivity, and temperature, the values
stated in SI units are to be regarded as standard. 16 times the outside diameter of the completed conductor.
5.2 The direction of lay of the outer layer shall be left-hand,
2. Referenced Documents
and it may be reversed or unidirectional in successive layers.
2.1 The following documents of the issue in effect on date
6. Construction
of material purchase form a part of this specification to the
extent referenced herein: 6.1 The construction of the compact round concentric-lay-
2.2 ASTM Standards: stranded conductors shall be as shown in Table 1.
2
6.2 The starting round copper wires used in the fabrication
B 3 Specification for Soft or Annealed Copper Wire
B 263 Test Method for Determination of Cross-Sectional of the compact round conductor shall be of such diameter as to
2
produce a finished conductor having a nominal cross-sectional
Area of Stranded Conductors
B 354 Terminology Relating to Uninsulated Metallic Elec- area and diameter as prescribed in Table 1.
2
trical Conductors
7. Density
3. Ordering Information
7.1 For the purpose of calculating linear densities, cross
sections, etc., the density of the copper shall be taken as 8.89
3.1 Orders for material under this specification shall include
3 3
the following information: g/cm (0.32117 lb/in. ) at 20°C.
3.1.1 Quantity of each size (Table 1),
8. Mass and Resistance
3.1.2 Conductor size; circular-mil area or AWG, (Section 6
8.1 The mass per unit length and d-c electrical resistance of
and Table 1),
a compact round conductor are greater than the total of these
3.1.3 Packaging (Section 14), if required,
characteristics of the compressed wires composing the finished
3.1.4 Special package marking, and
conductor, depending upon the lay. The standard increment of
3.1.5 Place of inspection (Section 16).
mass per unit length and electrical resistance shall be taken as
2 %. The nominal mass per unit length and d-c resistance are
1
This specification is under the jurisdiction of ASTM Committee B01 on
shown in Table 1. When the d-c resistance is measured at other
Electrical Conductors and is the direct responsibility of Subcommittee B01.04 on
than 20°C, it shall be corrected by using the multiplying factors
Conductors of Copper and Copper Alloys.
given in Table 2.
Current edition approved Mar. 10, 2001. Published May 2001. Originally
published as B 496 – 69. Last previous edition B 496 – 99.
2
Annual Book of ASTM Standards, Vol 02.03.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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B 496
TABLE 1 Construction Requirements of Compact Round Concentric-Lay-Stranded Copper Conductors
Conductor Size Compact Conductor Diameter D–C Resistance at 20°C
Number of Mass, Mass,
2
Wires lb/1000 ft kg/km
cmil AWG mm in. mm V/1000 ft V/km
A
1 000 000 . 507 61 1.060 26.9 3086 4590 0.0106 0.0347
A
900 000 . 456 61 0.999 25.4 2780 4140 0.0118 0.0386
A
800 000 . 405 61 0.938 23.8 2469 3680 0.0132 0.0433
A
750 000 . 380 61 0.908 23.0 2316 3450 0.0141 0.0462
A
700 000 . 355 61 0.877 22.3 2160 3220 0.0151 0.0495
A
650 000 . 329 61 0.845 21.4 2006 2990 0.0163 0.0535
A
600 000 .
...