ASTM B172-01a(2007)e1

Standard Specification for Rope-Lay-Stranded Copper Conductors Having Bunch-Stranded Members, for Electrical Conductors

ABSTRACT
This specification covers bare rope-lay-stranded conductors having bunch-stranded members from round copper wires, either uncoated or coated with tin, lead, or lead-alloy for use in electrical conductors. Rope-lay-stranded conductors having bunch-stranded members are classified as Class I, Class K, and Class M. Necessary joints in wires or in groups of wires shall be made in accordance with accepted commercial practice, taking into account the size of the wire or group of wires as related to the size of the entire conductor. Conductors of the same size and description furnished on one order shall have the same lay. In very flexible conductors, such as welding conductor, the direction of lay of the stranded members forming rope-lay-stranded conductor may be in the same, rather than in teversed. For the purpose of calculating the mass, cross sections, etc., the density of copper shall be taken. The mass and electrical resistance of a unit length of stranded conductor as a function of the length of lay shall be measured.
SCOPE
1.1 This specification covers bare rope-lay-stranded conductors having bunch-stranded members made from round copper wires, either uncoated or coated with tin, lead, or lead-alloy for use as electrical conductors (Explanatory Notes 1 and 2).
1.2 Coated wires shall include only those wires with finished diameters and densities substantially equal to the respective diameters and densities of uncoated wires.
1.3 The values stated in inch-pound or SI units are to be regarded separately as standard. Each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the specification. For conductor sizes designated by AWG or kcmil, the requirements in SI units have been numerically converted from corresponding values, stated or derived, in inch-pound units. For conductor sizes designated by SI units only, the requirements are stated or derived in SI units.
1.3.1 For density, resistivity, and temperature, the values stated in SI units are to be regarded as standard.

General Information

• Status: Historical
• Publication Date: 14-Mar-2007
• ICS: 29.060.20 - Cables
• Technical Committee: B01 - Electrical Conductors
• Drafting Committee: B01.04 - Conductors of Copper and Copper Alloys

Relations

• Replaces: ASTM B172-01a - Standard Specification for Rope-Lay-Stranded Copper Conductors Having Bunch-Stranded Members, for Electrical Conductors
• Effective Date: 15-Mar-2007
• Replaced By: ASTM B172-10 - Standard Specification for Rope-Lay-Stranded Copper Conductors Having Bunch-Stranded Members, for Electrical Conductors
• Effective Date: 01-Apr-2010
• Referred By: ASTM F855-23 - Standard Specifications for Temporary Protective Grounds to Be Used on De-energized Electric Power Lines and Equipment
• Effective Date: 15-Mar-2007
• Referred By: ASTM F2249-23 - Standard Specification for In-Service Test Methods for Temporary Grounding Jumper Assemblies Used on De-Energized Electric Power Lines and Equipment
• Effective Date: 15-Mar-2007
• Referred By: ASTM B226-11(2021) - Standard Specification for Cored, Annular, Concentric-Lay-Stranded Copper Conductors
• Effective Date: 15-Mar-2007
• Referred By: ASTM B173-17 - Standard Specification for Rope-Lay-Stranded Copper Conductors Having Concentric-Stranded Members, for Electrical Conductors
• Effective Date: 15-Mar-2007
• Referred By: ASTM B174-17 - Standard Specification for Bunch-Stranded Copper Conductors for Electrical Conductors
• Effective Date: 15-Mar-2007
• Referred By: ASTM B738-13(2018) - Standard Specification for Fine-Wire Bunch-Stranded and Rope-Lay Bunch-Stranded Copper Conductors for Use as Electrical Conductors
• Effective Date: 15-Mar-2007
• Referred By: ASTM B8-11(2017) - Standard Specification for Concentric-Lay-Stranded Copper Conductors, Hard, Medium-Hard, or Soft
• Effective Date: 15-Mar-2007
• Referred By: ASTM F2321-23 - Standard Specification for Flexible and Rigid Insulated Temporary By-Pass Jumpers
• Effective Date: 15-Mar-2007

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: B172 – 01a (Reapproved 2007)
Standard Specification for
Rope-Lay-Stranded Copper Conductors Having Bunch-
Stranded Members, for Electrical Conductors
This standard is issued under the fixed designation B172; 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.
´ NOTE—Table 1 was editorially corrected in March 2007.
1. Scope B173 Specification for Rope-Lay-Stranded Copper Con-
ductors Having Concentric-Stranded Members, for Elec-
1.1 This specification covers bare rope-lay-stranded con-
trical Conductors
ductors having bunch-stranded members made from round
B189 Specification for Lead-Coated and Lead-Alloy-
copper wires, either uncoated or coated with tin, lead, or
Coated Soft Copper Wire for Electrical Purposes
lead-alloy for use as electrical conductors (Explanatory Notes
B263 Test Method for Determination of Cross-Sectional
1 and 2).
Area of Stranded Conductors
1.2 Coated wires shall include only those wires with fin-
B354 Terminology Relating to Uninsulated Metallic Elec-
ished diameters and densities substantially equal to the respec-
trical Conductors
tive diameters and densities of uncoated wires.
2.3 American National Standard:
1.3 The values stated in inch-pound or SI units are to be
ANSI C42.35 Definitions of Electrical Terms
regarded separately as standard. Each system shall be used
independently of the other. Combining values from the two
3. Classification
systems may result in nonconformance with the specification.
3.1 For the purpose of this specification rope-lay-stranded
For conductor sizes designated byAWG or kcmil, the require-
conductors having bunch-stranded members are classifed as
ments in SI units have been numerically converted from
follows:
corresponding values, stated or derived, in inch-pound units.
3.1.1 Class I—Conductors consisting of wires 0.0201-in.
For conductor sizes designated by SI units only, the require-
(0.511-mm) diameter (No. 24 AWG) to produce rope-lay-
ments are stated or derived in SI units.
stranded conductors up to 2 000 000 cmil (1013 mm ) in total
1.3.1 For density, resistivity, and temperature, the values
cross-sectional area. (Typical use is for special apparatus
stated in SI units are to be regarded as standard.
conductor.)
2. Referenced Documents 3.1.2 Class K—Conductors consisting of wires 0.0100-in.
(0.254-mm) diameter (No. 30 AWG) to produce rope-lay-
2.1 The following documents of the issue in effect at the
stranded conductors up to 1 000 000 cmil (507 mm ) in total
time of reference form a part of this specification to the extent
cross-sectional area. (Typical use is for special portable cord
referenced herein:
2 and conductors.)
2.2 ASTM Standards:
3.1.3 Class M—Conductors consisting of wires 0.0063-in.
B3 Specification for Soft or Annealed Copper Wire
(0.160-mm) diameter (No. 34 AWG) to produce rope-lay-
B33 Specification forTinned Soft orAnnealed CopperWire
stranded conductors up to 1 000 000 cmil (507 mm ) in total
for Electrical Purposes
cross-sectional area. (Typical use is for welding conductors.)
1 4. Ordering Information
This specification is under the jurisdiction of ASTM Committee B01 on
Electrical Conductors and is the direct responsibility of Subcommittee B01.04 on
4.1 Orders for material under this specification shall include
Conductors of Copper and Copper Alloys.
the following information:
Current edition approved March 15, 2007. Published April 2007. Originally
4.1.1 Quantity of each size and class,
approved in 1942 to replace portions of B158–41 T. Last previous edition approved
in 2001 as B172 – 01a. DOI: 10.1520/B0172-01AR07E01.
4.1.2 Conductor size: circular-mil area or AWG (see 7.1),
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
the ASTM website. 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
B172 – 01a (2007)
4.1.3 Class (Section 4 and Table 1), 4.1.9 Place of inspection (Section 13).
4.1.4 Whether coated or uncoated; if coated, designate type
of coating (see 11.1),
5. Joints
4.1.5 Details of special-purpose lays, if required (see 6.2,
5.1 Necessary joints in wires or in groups of wires shall be
6.3, and Explanatory Note 3),
made in accordance with accepted commercial practice, taking
4.1.6 Package size (see 15.1),
into account the size of the wire or group of wires as related to
4.1.7 Special package marking, if required (Section 14),
the size of the entire conductor.
4.1.8 Lagging, if required (see 15.2), and
A
TABLE 1 Construction Requirements of Rope-Lay Stranded Copper Conductors Having Bunch-Stranded Members
Class I Class K Class M
Wire Wire Wire
Area of
Diameter Diameter Diameter
Cross
0.0201 0.0100 0.0063
Section
Size in. in. in.
AWG (0.511 Approximate (0.254 Approximate (0.160 Approximate
B B B
mm) Mass mm) Mass mm) Mass
cmil mm † Nominal Strand lb/ kg/ Nominal Strand lb/ kg/ Nominal Strand lb/ kg/
C C C
Number Construction 1000 ft. km Number Construction 1000 ft. km Number Construction 1000 ft. km
of Wires of Wires of Wires
2 000 000 1013 . . . 4921 19 by 7 by 37 6439 9583 . . . . . . . . . . . . . . . . . . . . . . . .
1 900 000 963 . . . 4788 19 by 7 by 36 6265 9324 . . . . . . . . . . . . . . . . . . . . . . . .
1 800 000 912 . . . 4522 19 by 7 by 34 5917 8806 . . . . . . . . . . . . . . . . . . . . . . . .
1 750 000 887 . . . 4389 19 by 7 by 33 5743 8547 . . . . . . . . . . . . . . . . . . . . . . . .
1 700 000 861 . . . 4256 19 by 7 by 32 5569 8288 . . . . . . . . . . . . . . . . . . . . . . . .
1 600 000 811 . . . 3990 19 by 7 by 30 5221 7770 . . . . . . . . . . . . . . . . . . . . . . . .
1 500 000 760 . . . 3724 19 by 7 by 28 4873 7252 . . . . . . . . . . . . . . . . . . . . . . . .
1 400 000 709 . . . 3458 19 by 7 by 26 4525 6734 . . . . . . . . . . . . . . . . . . . . . . . .
1 300 000 659 . . . 3192 19 by 7 by 24 4177 6216 . . . . . . . . . . . . . . . . . . . . . . . .
1 250 000 633 . . . 3059 19 by 7 by 23 4003 5957 . . . . . . . . . . . . . . . . . . . . . . . .
1 200 000 608 . . . 2926 19 by 7 by 22 3829 5698 . . . . . . . . . . . . . . . . . . . . . . . .
1 100 000 557 . . . 2793 19 by 7 by 21 3655 5439 . . . . . . . . . . . . . . . . . . . . . . . .
1 000 000 507 . . . 2527 19 by 7 by 19 3307 4921 10 101 37 by 7 by 39 3272 4869 25 193 61 by 7 by 59 3239 4819
900 000 456 . . . 2261 19 by 7 by 17 2959 4403 9065 37 by 7 by 35 2936 4369 22 631 61 by 7 by 53 2909 4329
800 000 405 . . . 1995 19 by 7 by 15 2611 3885 7980 19 by 7 by 60 2585 3846 20 069 61 by 7 by 47 2580 3839
3750 000 380 . . . 1862 19 by 7 by 14 2436 3626 7581 19 by 7 by 57 2455 3654 18 788 61 by 7 by 44 2415 3594
700 000 355 . . . 1729 19 by 7 by 13 2262 3367 6916 19 by 7 by 52 2240 3333 17 507 61 by 7 by 41 2251 3349
650 000 329 . . . 1596 19 by 7 by 12 2088 3108 6517 19 by 7 by 49 2111 3141 16 226 61 by 7 by 38 2086 3104
600 000 304 . . . 1470 7 by 7 by 30 1906 2836 5985 19 by 7 by 45 1938 2885 14 945 61 by 7 by 35 1921 2859
550 000 279 . . . 1372 7 by 7 by 28 1779 2647 5453 19 by 7 by 41 1766 2628 13 664 61 by 7 by 32 1757 2614
500 000 253 . . . 1225 7 by 7 by 25 1588 2363 5054 19 by 7 by 38 1637 2436 12 691 37 by 7 by 49 1631 2428
450 000 228 . . . 1127 7 by 7 by 23 1461 2174 4522 19 by 7 by 34 1465 2180 11 396 37 by 7 by 44 1465 2180
400 000 203 . . . 980 7 by 7 by 20 1270 1891 3990 19 by 7 by 30 1292 1923 10 101 37 by 7 by 39 1298 1932
350 000 177 . . . 882 7 by 7 by 18 1143 1701 3458 19 by 7 by 26 1120 1667 8806 37 by 7 by 34 1132 1685
300 000 152 . . . 735 7 by 7 by 15 953 1418 2989 7 by 7 by 61 959 1427 7581 19 by 7 by 57 975 1450
250 000 127 . . . 637 7 by 7 by 13 826 1229 2499 7 by 7 by 51 802 1193 6384 19 by 7 by 48 821 1221
211 600 107 0000 532 19 by 28 683 1017 2107 7 by 7 by 43 676 1006 5320 19 by 7 by 40 684 1018
167 800 85.0 000 418 19 by 22 537 799 1666 7 by 7 by 34 535 795 4256 19 by 7 by 32 547 814
133 100 67.4 00 342 19 by 18 439 654 1323 7 by 7 by 27 424 632 3325 19 by 7 by 25 427 636
105 600 53.5 0 266 19 by 14 342 508 1064 19 by 56 338 503 2646 7 by 7 by 54 337 501
83 690 42.4 1 210 7 by 30 267 397 836 19 by 44 266 395 2107 7 by 7 by 43 268 399
66 360 33.6 2 161 7 by 23 205 305 665 19 by 35 211 315 1666 7 by 7 by 34 212 316
52 620 26.7 3 133 7 by 19 169 252 532 19 by 28 169 252 1323 7 by 7 by 27 168 251
41 740 21.1 4 105 7 by 15 134 199 420 7 by 60 132 197 1064 19 by 56 134 200
33 090 16.8 5 84 7 by 12 107 159 336 7 by 48 106 157 836 19 by 44 105 157
26 240 13.3 6 63 7 by 9 80 119 266 7 by 38 84 125 665 19 by 35 84 125
20 820 10.5 7 . . . . . . . . . . . . 210 7 by 30 66 98 532 19 by 28 67 100
16 510 8.37 8 . . . . . . . . . . . . 168 7 by 24 53 79 420 7 by 60 52 78
13 090 6.63 9 . . . . . . . . . . . . 133 7 by 19 42 62 336 7 by 48 42 62
10 380 5.26 10 . . . . . . . . 259 7by37 32 48
6530 3.31 12 . . . . . . . . . . . . . . . . . . . . . . . . 168 7 by 24 21 31
†Editorially corrected.
A
The constructions shown in this table are typical of those used in the industry. It is not intended that this table preclude other constructions which may be desireable
for specific applications. The constructions shown provide for a finished, non-covered, stranded conductor approximately of the area indicated. When specified by the
purchaser, the number or size of wires may be increased to provide additional area to compensate for draw-down during subsequent processing.
B
Values for the mass of the completed conductor are approximate. The mass values are based upon the standard stranding increments listed in Explanatory Note 6.
C
Strand Construction—#A by #B by #C: where #C is the number of wires in each bunch-stranded member; #B is the number of bunch stranded members which
make-up each rope-stranded member; and #A (where used) is the number of rope-stranded members in the conductor. Where #A is not given, the conductor consists of
one rope-stranded member. For example, 19 by 7 by 32 indicates a construction consisting of 19 rope-stranded members, each of which consists of 7 bunch-stranded
members with 32 wires each.
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B172 – 01a (2007)
5.2 Bunch-stranded members or rope-stranded members by Specifications B3, B33,or B189, as applicable. For ex-
forming the completed conductor may be joined as a unit by ample, where the unstranded
...