ASTM B496-04(2010)e1

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

ABSTRACT
This specification covers bare compact round concentric-lay-stranded conductors made from uncoated round copper wires for general use for electrical purposes. Welds and brazes shall be made in rods and wires prior to final drawing. The conductors shall conform to the required construction values of nominal cross-sectional area, diameter, mass per unit length and dc electrical resistance. Tests for the physical and electrical properties of wires composing the conductors shall be made before stranding.
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: 30-Sep-2010
• 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 B496-04 - Standard Specification for Compact Round Concentric-Lay-Stranded Copper Conductors
• Effective Date: 01-Oct-2010
• Replaced By: ASTM B496-13 - Standard Specification for Compact Round Concentric-Lay-Stranded Copper Conductors
• Effective Date: 01-Apr-2013
• Referred By: ASTM B226-11(2021) - Standard Specification for Cored, Annular, Concentric-Lay-Stranded Copper Conductors
• Effective Date: 01-Oct-2010

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
´1
Designation:B496 −04(Reapproved 2010)
Standard Specification for
Compact Round Concentric-Lay-Stranded Copper
Conductors
This standard is issued under the fixed designation B496; 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.
´ NOTE—References to Sections 15 and 14 in 3.1.3 and 3.1.5, respectively, were corrected editorially in 2010.
1. Scope 3.1.2 Conductor size; circular-mil area or AWG, (Section 6
and Table 1),
1.1 This specification covers bare compact round
3.1.3 Packaging (Section 15), if required,
concentric-lay-stranded conductors made from uncoated round
3.1.4 Special package marking, and
copper wires for general use for electrical purposes. These
3.1.5 Place of inspection (Section 14).
conductors shall be constructed with a central core surrounded
by one or more layers of helically laid compacted wires
4. Joints
(Explanatory Note 1 and Note 2).
4.1 Welds and brazes may be made in rods or in wires prior
1.2 The values stated in inch-pound or SI units are to be
to final drawing.
regarded separately as standard. The values in each system are
4.2 Welds and brazes may be made in the individual round
not exact equivalents; therefore, each system shall be used
drawn wires for compact conductors, but shall not be closer
independently of the other. Combining values from the two
together than 1 ft (300 mm) for conductor of 19 wires or less
systems may result in nonconformance with the specification.
or closer than 1 ft (300 mm) in a layer for conductor of more
1.2.1 For density, resistivity, and temperature, the values
than 19 wires.
stated in SI units are to be regarded as standard.
4.3 No joint nor splice shall be made in a compact-stranded
2. Referenced Documents
conductor as a whole.
2.1 The following documents of the issue in effect on date
5. Lay
of material purchase form a part of this specification to the
5.1 The length of lay shall be not less than 8 nor more than
extent referenced herein:
16 times the outside diameter of the completed conductor.
2.2 ASTM Standards:
5.2 The direction of lay of the outer layer shall be left-hand,
B3 Specification for Soft or Annealed Copper Wire
and it shall be reversed in successive layers, unidirectional, or
B263 Test Method for Determination of Cross-Sectional
unilay.
Area of Stranded Conductors
B354 Terminology Relating to Uninsulated Metallic Electri-
6. Construction
cal Conductors
6.1 The construction of the compact round concentric-lay-
stranded conductors shall be as shown in Table 1.
3. Ordering Information
6.2 The starting round copper wires used in the fabrication
3.1 Orders for material under this specification shall include
of the compact round conductor shall be of such diameter as to
the following information:
produce a finished conductor having a nominal cross-sectional
3.1.1 Quantity of each size (Table 1),
area and diameter as prescribed in Table 1.
7. Density
This specification is under the jurisdiction of ASTM Committee B01 on
Electrical Conductors and is the direct responsibility of Subcommittee B01.04 on
7.1 For the purpose of calculating linear densities, cross
Conductors of Copper and Copper Alloys.
sections, and so forth, the density of the copper shall be taken
Current edition approved Oct. 1, 2010. Published December 2010. Originally
3 3
approved in 1969. Last previous edition approved in 2004 as B496 – 04. DOI: as 8.89 g/cm (0.32117 lb/in. ) at 20°C.
10.1520/B0496-04R10E01.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 8. Mass and Resistance
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
8.1 The mass per unit length and dc electrical resistance of
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. a compact round conductor are greater than the total of these
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
´1
B496−04 (2010)
TABLE 1 Construction Requirements of Compact Round Concentric-Lay-Stranded Copper Conductors
Conductor Size Compact Conductor Diameter DC Resistance at 20°C
Number of Mass, Mass,
Wires lb/1000 ft kg/km
cmil AWG mm in. mm Ω/1000 ft Ω/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 . 304 61 0.813 20.6 1850 2760 0.0176 0.0577
A
550 000 . 279 61 0.775 19.7 1700 2530 0.0192 0.0630
B
500 000 . 253 37 0.736 18.7 1542 2300 0.0212 0.0695
B
450 000 . 228 37 0.700 17.8 1390 2070 0.0235 0.0770
B
400 000 . 203 37 0.659 16.7 1236 1840 0.0264 0.0865
B
350 000 . 177 37 0.616 15.7 1080 1610 0.0302 0.0990
B
300 000 . 152 37 0.570 14.5 925 1380 0.0353 0.116
B
250 000 . 127 37 0.520 13.2 772 1150 0.0423 0.139
C
211 600 4/0 107 19 0.475 12.1 653 972 0.0500 0.164
C
167 800 3/0 85.0 19 0.423 10.8 518 771 0.0630 0.206
C
133 100 2/0 67.4 19 0.376 9.57 411 611 0.0795 0.261
C
105 600 1/0 53.5 19 0.336 8.55 326 485 0.100 0.328
C
83 690 1 42.4 19 0.299 7.60 259 385 0.126 0.413
66 360 2 33.6 7 0.268 6.81 205 305 0.159 0.521
41 740 4 21.2 7 0.213 5.41 129 192 0.253 0.830
26 240 6 13.3 7 0.169 4.29 80.9 121 0.403 1.32
16 510 8 8.37 7 0.134 3.40 51.0 75.9 0.641 2.10
A
58 wires minimum.
B
35 wires minimum.
C
18 wires minimum.
characteristics of the compressed wires composing the finished 9. Variation in Area
conductor, depending upon the lay. The standard increment of
9.1 Thecross-sectionalareaofthecompactroundconductor
mass per unit length and electrical resistance shall be taken as
shall be not less than 98 % of the cross-sectional area as
2 %. The nominal mass per unit length and dc resistance are
specified in Column 1 of Table 1.
shown in Table 1. When the dc resistance is measured at other
9.2 The manufacturer shall determine the cross-sectional
than20°C,itshallbecorrectedbyusingthemultiplyingfactors
area by Test Method B263. In applying this method, the
given in Table 2.
increment in mass per unit length resulting from stranding may
8.2 Incaseswherethelayisdefinitelyknown,theincrement
be the applicable v
...

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: B496 – 04
Standard Specification for
Compact Round Concentric-Lay-Stranded Copper
Conductors
This standard is issued under the fixed designation B496; 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 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 Thevaluesstatedininch-poundorSIunitsaretoberegardedseparatelyasstandard.Thevaluesineachsystemarenotexact
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.
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 ASTM Standards:
B3 Specification for Soft or Annealed Copper Wire
B263 Test Method for Determination of Cross-Sectional Area of Stranded Conductors
B354 Terminology Relating to Uninsulated Metallic Electrical Conductors
3. Ordering Information
3.1 Orders for material under this specification shall include the following information:
3.1.1 Quantity of each size (Table 1),
3.1.2 Conductor size; circular-mil area or AWG, (Section 6 and Table 1),
3.1.3 Packaging (Section 14), if required,
3.1.4 Special package marking, and
3.1.5 Place of inspection (Section 16).
4. Joints
4.1 Welds and brazes may be made in rods or in wires prior to final drawing.
4.2 Welds and brazes may be made in the individual round drawn wires for compact conductors, but shall not be closer together
than 1 ft (300 mm) for conductor of 19 wires or less or closer than 1 ft (300 mm) in a layer for conductor of more than 19 wires.
4.3 No joint nor splice shall be made in a compact-stranded conductor as a whole.
5. Lay
5.1 The length of lay shall be not less than 8 nor more than 16 times the outside diameter of the completed conductor.
5.2 The direction of lay of the outer layer shall be left-hand, and it shall be reversed in successive layers, unidirectional, or
unilay.
6. Construction
6.1 The construction of the compact round concentric-lay-stranded conductors shall be as shown in Table 1.
6.2 The starting round copper wires used in the fabrication of the compact round conductor shall be of such diameter as to
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.
CurrenteditionapprovedApril1,2004.PublishedApril2004.Originallyapprovedin1969.Lastpreviouseditionapprovedin2001asB496 – 01.DOI:10.1520/B0496-04.
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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
B496 – 04
TABLE 1 Construction Requirements of Compact Round Concentric-Lay-Stranded Copper Conductors
Conductor Size Compact Conductor Diameter DC Resistance at 20°C
Number of Mass, Mass,
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 . 304 61 0.813 20.6 1850 2760 0.0176 0.0577
A
550 000 . 279 61 0.775 19.7 1700 2530 0.0192 0.0630
B
500 000 . 253 37 0.736 18.7 1542 2300 0.0212 0.0695
B
450 000 . 228 37 0.700 17.8 1390 2070 0.0235 0.0770
B
400 000 . 203 37 0.659 16.7 1236 1840 0.0264 0.0865
B
350 000 . 177 37 0.616 15.7 1080 1610 0.0302 0.0990
B
300 000 . 152 37 0.570 14.5 925 1380 0.0353 0.116
B
250 000 . 127 37 0.520 13.2 772 1150 0.0423 0.139
C
211 600 4/0 107 19 0.475 12.1 653 972 0.0500 0.164
C
167 800 3/0 85.0 19 0.423 10.8 518 771 0.0630 0.206
C
133 100 2/0 67.4 19 0.376 9.57 411 611 0.0795 0.261
C
105 600 1/0 53.5 19 0.336 8.55 326 485 0.100 0.328
C
83 690 1 42.4 19 0.299 7.60 259 385 0.126 0.413
66 360 2 33.6 7 0.268 6.81 205 305 0.159 0.521
41 740 4 21.2 7 0.213 5.41 129 192 0.253 0.830
26 240 6 13.3 7 0.169 4.29 80.9 121 0.403 1.32
16 510 8 8.37 7 0.134 3.40 51.0 75.9 0.641 2.10
A
58 wires minimum.
B
35 wires minimum.
C
18 wires minimum.
produce a finished conductor having a nominal cross-sectional area and diameter as prescribed in Table 1.
7. Density
7.1 For the purpose of calculating linear densities, cross sections, and so forth, the density of the copper shall be taken as 8.89
3 3
g/cm (0.32117 lb/in. ) at 20°C.
8. Mass and Resistance
8.1 The mass per unit length and dc electrical resistance of a compact round conductor are greater than the total of these
characteristicsofthecompressedwirescomposingthefinishedconductor,dependinguponthelay.Thestandardincrementofmass
per unit length and electrical resistance shall be taken as 2 %. The nominal mass per unit length and dc resistance are shown in
Table1.Whenthedcresistanceismeasuredatotherthan20°C,itshallbecorrectedbyusingthemultiplyingfactorsgiveninTable
2.
8.2 In cases where the lay is definitely known, the increment may be calculated if desired (Explanatory Note 3).
8.3 For conductors to be used in covered or insulated wires or cables, direct current (DC) resistance measurement may be used
instead of the method outlined in Section 9, to determine compliance with this specification.
TABLE 2 Temperature Correction Factors for Conductor
Resistance
Multiplying Factor fo
...