1、Designation: B172 10 (Reapproved 2015)B172 17Standard Specification forRope-Lay-Stranded Copper Conductors Having Bunch-Stranded Members, for Electrical Conductors1This standard is issued under the fixed designation B172; the number immediately following the designation indicates the year oforiginal
2、 adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S. Department of D
3、efense.1. Scope1.1 This specification covers bare rope-lay-stranded conductors having bunch-stranded members made from round copperwires, 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 wir
4、es with finished diameters and densities substantially equal to the respectivediameters 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 usedindependently of the other. Combining values from the two system
5、s may result in nonconformance with the specification. Forconductor sizes designated by AWG or kcmil, the requirements in SI units have been numerically converted from correspondingvalues, stated or derived, in inch-pound units. For conductor sizes designated by SI units only, the requirements are s
6、tated orderived in SI units.1.3.1 For density, resistivity, and temperature, the values stated in SI units are to be regarded as standard.1.4 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles
7、 for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 The following documents of the issue in effect at the time of reference form a part of this specification to the ex
8、tentreferenced herein:2.2 ASTM Standards:2B3 Specification for Soft or Annealed Copper WireB33 Specification for Tin-Coated Soft or Annealed Copper Wire for Electrical PurposesB173 Specification for Rope-Lay-Stranded Copper Conductors Having Concentric-Stranded Members, for Electrical Conduc-torsB18
9、9 Specification for Lead-Coated and Lead-Alloy-Coated Soft Copper Wire for Electrical PurposesB193 Test Method for Resistivity of Electrical Conductor MaterialsB263 Test Method for Determination of Cross-Sectional Area of Stranded ConductorsB354 Terminology Relating to Uninsulated Metallic Electrica
10、l Conductors2.3 American National Standard:ANSI C42.35 Definitions of Electrical Terms33. Classification3.1 For the purpose of this specification rope-lay-stranded conductors having bunch-stranded members are classifedclassifiedas follows:1 This specification is under the jurisdiction of ASTM Commit
11、tee B01 on Electrical Conductors and is the direct responsibility of Subcommittee B01.04 on Conductorsof Copper and Copper Alloys.Current edition approved April 1, 2015April 1, 2017. Published April 2015April 2017. Originally approved in 1942 to replace portions of B158 41 T. Last previousedition ap
12、proved in 20102015 as B172 10.B172 10 (2015). DOI: 10.1520/B0172-10R15.10.1520/B0172-17.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summar
13、y page on the ASTM website.3 Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http:/www.ansi.org.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made
14、to the previous version. Becauseit 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 versionof the standard as published by ASTM is to be considered the official document.Copyri
15、ght ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13.1.1 Class IConductors consisting of wires 0.0201-in. (0.511-mm) diameter (No. 24 AWG) to produce rope-lay-strandedconductors up to 2 000 000 cmil (1013 mm2) in total cross-sectional area. (T
16、ypical use is for special apparatus conductor.)3.1.2 Class KConductors consisting of wires 0.0100-in. (0.254-mm) diameter (No. 30 AWG) to produce rope-lay-strandedconductors up to 1 000 000 cmil (507 mm2) in total cross-sectional area. (Typical use is for special portable cord and conductors.)3.1.3
17、Class MConductors consisting of wires 0.0063-in. (0.160-mm) diameter (No. 34 AWG) to produce rope-lay-strandedconductors up to 1 000 000 cmil (507 mm2) in total cross-sectional area. (Typical use is for welding conductors.)4. Ordering Information4.1 Orders for material under this specification shall
18、 include the following information:4.1.1 Quantity of each size and class,4.1.2 Conductor size: circular-mil area or AWG (see 7.1),4.1.3 Class (Section 4 and Tables 1-3),4.1.4 Whether coated or uncoated; if coated, designate type of coating (see 11.1),TABLE 1 Construction Requirements of Class I Rope
19、-Lay Stranded Copper Conductors Having Bunch Stranded MembersAUncoated Copper Coated CopperArea of Cross SectionSizeAWGWireDiameter0.0201in.(0.511mm)ApproximateMassBNominaldc resistance 20CMaximumdc resistance 20CNominaldc resistance 20CMaximumdc resistance 20Ccmil mm2 NominalNumberof WiresStrandCon
20、structionA by B by CClb/1000 ft.kg/kmOhm / kft Ohm / km Ohm /kftOhm /kmOhm / kft Ohm / km Ohm /kftOhm /km2 000 000 1013 . . . 4921 19 by 7 by 37 6439 9583 0.00555 0.0182 0.00566 0.0186 0.00577 0.0189 0.00589 0.01931 900 000 963 . . . 4788 19 by 7 by 36 6265 9324 0.00584 0.0192 0.00596 0.0196 0.00607
21、 0.0199 0.00619 0.02031 800 000 912 . . . 4522 19 by 7 by 34 5917 8806 0.00616 0.0202 0.00628 0.0206 0.00641 0.0210 0.00654 0.02141 750 000 887 . . . 4389 19 by 7 by 33 5743 8547 0.00634 0.0208 0.00647 0.0212 0.00659 0.0216 0.00672 0.02201 700 000 861 . . . 4256 19 by 7 by 32 5569 8288 0.00653 0.021
22、4 0.00666 0.0218 0.00679 0.0223 0.00693 0.02271 600 000 811 . . . 3990 19 by 7 by 30 5221 7770 0.00694 0.0228 0.00708 0.0233 0.00721 0.0237 0.00735 0.02421 500 000 760 . . . 3724 19 by 7 by 28 4873 7252 0.00740 0.0243 0.00755 0.0248 0.00769 0.0252 0.00784 0.02571 400 000 709 . . . 3458 19 by 7 by 26
23、 4525 6734 0.00793 0.0260 0.00809 0.0265 0.00824 0.0270 0.00840 0.02751 300 000 659 . . . 3192 19 by 7 by 24 4177 6216 0.00854 0.0280 0.00871 0.0286 0.00888 0.0291 0.00906 0.02971 250 000 633 . . . 3059 19 by 7 by 23 4003 5957 0.00888 0.0291 0.00906 0.0297 0.00923 0.0303 0.00941 0.03091 200 000 608
24、. . . 2926 19 by 7 by 22 3829 5698 0.00925 0.0303 0.00944 0.0309 0.00962 0.0316 0.00981 0.03221 100 000 557 . . . 2793 19 by 7 by 21 3655 5439 0.0101 0.0331 0.0103 0.0338 0.0105 0.0344 0.0107 0.03511 000 000 507 . . . 2527 19 by 7 by 19 3307 4921 0.0111 0.0364 0.0113 0.0371 0.0115 0.0379 0.0117 0.03
25、87900 000 456 . . . 2261 19 by 7 by 17 2959 4403 0.0123 0.0405 0.0125 0.0413 0.0128 0.0421 0.0131 0.0429800 000 405 . . . 1995 19 by 7 by 15 2611 3885 0.0139 0.0455 0.0142 0.0464 0.0144 0.0473 0.0147 0.0482750 000 380 . . . 1862 19 by 7 by 14 2436 3626 0.0148 0.0485 0.0151 0.0495 0.0154 0.0505 0.015
26、7 0.0515700 000 355 . . . 1729 19 by 7 by 13 2262 3367 0.0159 0.0520 0.0162 0.0530 0.0165 0.0541 0.0168 0.0552650 000 329 . . . 1596 19 by 7 by 12 2088 3108 0.0171 0.0560 0.0174 0.0571 0.0178 0.0583 0.0182 0.0594600 000 304 . . . 1470 7 by 7 by 30 1906 2836 0.0183 0.0601 0.0187 0.0613 0.0191 0.0625
27、0.0195 0.0638550 000 279 . . . 1372 7 by 7 by 28 1779 2647 0.0200 0.0656 0.0204 0.0669 0.0208 0.0682 0.0212 0.0696500 000 253 . . . 1225 7 by 7 by 25 1588 2363 0.0220 0.0721 0.0224 0.0735 0.0229 0.0750 0.0234 0.0765450 000 228 . . . 1127 7 by 7 by 23 1461 2174 0.0244 0.0802 0.0249 0.0817 0.0254 0.08
28、34 0.0259 0.0850400 000 203 . . . 980 7 by 7 by 20 1270 1891 0.0275 0.0902 0.0281 0.0920 0.0286 0.0938 0.0292 0.0957350 000 177 . . . 882 7 by 7 by 18 1143 1701 0.0314 0.103 0.0320 0.105 0.0327 0.107 0.0334 0.109300 000 152 . . . 735 7 by 7 by 15 953 1418 0.0366 0.120 0.0373 0.122 0.0381 0.125 0.038
29、9 0.128250 000 127 . . . 637 7 by 7 by 13 826 1229 0.0440 0.144 0.0449 0.147 0.0457 0.150 0.0466 0.153211 600 107 0000 532 19 by 28 683 1017 0.0515 0.169 0.0525 0.172 0.0536 0.176 0.0546 0.180167 800 85 000 418 19 by 22 537 799 0.0649 0.213 0.0662 0.217 0.0675 0.221 0.0689 0.225133 100 67.4 00 342 1
30、9 by 18 439 654 0.0818 0.268 0.0834 0.273 0.0851 0.279 0.0868 0.285105 600 53.5 0 266 19 by 14 342 508 0.103 0.338 0.105 0.345 0.107 0.352 0.109 0.35983 690 42.4 1 210 7 by 30 267 397 0.129 0.423 0.132 0.431 0.134 0.440 0.137 0.44966 360 33.6 2 161 7 by 23 205 305 0.163 0.533 0.166 0.544 0.169 0.555
31、 0.172 0.56652 620 26.7 3 133 7 by 19 169 252 0.205 0.673 0.209 0.686 0.213 0.699 0.217 0.71341 740 21.1 4 105 7 by 15 134 199 0.258 0.848 0.263 0.865 0.269 0.882 0.274 0.90033 090 16.8 5 84 7 by 12 107 159 0.326 1.07 0.333 1.09 0.339 1.11 0.346 1.1326 240 13.3 6 63 7 by 9 80 119 0.411 1.35 0.419 1.
32、38 0.427 1.40 0.436 1.43A 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 bedesireabledesirable for specific applications. The constructions shown provide for finished, covered or non-covered,
33、stranded conductor approximately of the areaindicated. When specified by the purchaser, the number of strands may be increased to provide additional area to compensate for draw-down during subsequentprocessing.B Values for the mass of the completed conductor are approximate. The mass values are base
34、d 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-upeach rope-stranded member; and #A (where used) is the number of rope-stran
35、ded members in the conductor. Where #A is not given, the conductor consists of onerope-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-strandedmembers with 32 wires each.B172 172TABLE 2 Construction Requir
36、ements of Class K Rope-Lay Stranded Copper Conductors Having Bunch Stranded MembersAArea of Cross Section WireDiameter0.0100 In.(0.254 mm)Approximate MassB Uncoated Copper Coated CopperArea of Cross Section WireDiameter0.0100 In.(0.254 mm)Approximate MassB Uncoated Copper Coated Coppercmil mm2 Size
37、AWG NominalNumberof WiresStrandConstructionA by B by CCLb/1000 ft Kg/km Nominal dcresistance 20CMaximum dcresistance 20CNominal dcresistance 20CMaximum dcresistance 20C1,000,000 507 10101 37 by 7 by 39 3272 4869 0.0111 0.0364 0.0113 0.0371 0.0119 0.0391 0.0121 0.0399900,000 456 9065 37 by 7 by 35 29
38、36 4369 0.0123 0.0405 0.0125 0.0413 0.0132 0.0434 0.0135 0.0443800,000 405 7980 19 by 7 by 60 2585 3846 0.0139 0.0455 0.0142 0.0464 0.0149 0.0489 0.0152 0.0499750,000 380 7581 19 by 7 by 57 2455 3654 0.0148 0.0485 0.0151 0.0495 0.0159 0.0521 0.0162 0.0531700,000 355 6916 19 by 7 by 52 2240 3333 0.01
39、59 0.0520 0.0162 0.0530 0.0170 0.0558 0.0173 0.0569650,000 329 6517 19 by 7 by 49 2111 3141 0.0171 0.0560 0.0174 0.0571 0.0183 0.0601 0.0187 0.0613600,000 304 5985 19 by 7 by 45 1938 2885 0.0185 0.0607 0.0189 0.0619 0.0199 0.0651 0.0203 0.0664550,000 279 5453 19 by 7 by 41 1766 2628 0.0202 0.0662 0.
40、0206 0.0675 0.0217 0.0711 0.0221 0.0725500,000 253 5054 19 by 7 by 38 1637 2436 0.0222 0.0728 0.0226 0.0743 0.0238 0.0782 0.0243 0.0798450,000 228 4522 19 by 7 by 34 1465 2180 0.0247 0.0809 0.0252 0.0825 0.0265 0.0869 0.0270 0.0886400,000 203 3990 19 by 7 by 30 1292 1923 0.0277 0.0910 0.0283 0.0928
41、0.0298 0.0977 0.0304 0.0997350,000 177 3458 19 by 7 by 26 1120 1667 0.0317 0.104 0.0323 0.106 0.0340 0.112 0.0347 0.114300,000 152 2989 7 by 7 by 61 959 1427 0.0366 0.120 0.0373 0.122 0.0393 0.129 0.0401 0.132250,000 127 2499 7 by 7 by 51 802 1193 0.0440 0.144 0.0449 0.147 0.0472 0.155 0.0481 0.1582
42、11,600 107 0000 2107 7 by 7 by 43 676 1006 0.0520 0.171 0.0530 0.174 0.0558 0.183 0.0569 0.187167,800 85 000 1666 7 by 7 by 34 535 795 0.0655 0.215 0.0668 0.219 0.0703 0.231 0.0717 0.236133,100 67.4 00 1323 7 by 7 by 27 424 632 0.0826 0.271 0.0843 0.276 0.0887 0.291 0.0905 0.297105,600 53.5 0 1064 1
43、9 by 56 338 503 0.103 0.338 0.105 0.345 0.111 0.363 0.113 0.37083,690 42.4 1 836 19 by 44 266 395 0.130 0.427 0.133 0.435 0.140 0.458 0.142 0.46766,360 33.6 2 665 19 by 35 211 315 0.164 0.538 0.167 0.549 0.176 0.578 0.180 0.59052,620 26.7 3 532 19 by 28 169 252 0.207 0.679 0.211 0.693 0.222 0.729 0.
44、227 0.74441,740 21.1 4 420 7 by 60 132 197 0.258 0.848 0.264 0.865 0.277 0.910 0.283 0.92833,090 16.8 5 336 7 by 48 106 157 0.326 1.07 0.333 1.09 0.350 1.15 0.357 1.1726,240 13.3 6 266 7 by 38 84 125 0.411 1.35 0.419 1.38 0.441 1.45 0.450 1.4820,820 10.5 7 210 7 by 30 66 98 0.518 1.70 0.528 1.73 0.5
45、56 1.82 0.567 1.8616,510 8.37 8 168 7 by 24 53 79 0.653 2.14 0.666 2.19 0.701 2.30 0.715 2.3513,090 6.63 9 133 7 by 19 42 62 0.824 2.70 0.840 2.76 0.885 2.90 0.902 2.96A The constructions shown in this table are typical of those used in the industry. It is not intended that this table preclude other
46、 constructions which may be desirable for specific applications. The constructions shownprovide for finished covered or non-covered stranded conductor approximately of the area indicated. When specified by the purchaser, the number of strands may be increased to provide additional area to compensate
47、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
48、 is the number of bunch-stranded members which make up each rope stranded member, and A (where used) isthe 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
49、rope-strandedmembers each of which consist of 7 bunch-stranded members with 32 wires each.B172173TABLE 3 Construction requirements of Class M Rope-Lay Stranded Copper Conductors Having Bunch Stranded MembersAArea of Cross Section WireDiameter0.0063 In.(0.160 mm)Approximate MassB Uncoated Copper Coated CopperArea of Cross Section WireDiameter0.0063 In.(0.160 mm)Approximate MassB Uncoated Copper Coated Coppercmil mm2 Size AWG NominalNumber ofWiresStrandConstructionA by B by CCLb/1000 ft Kg/km Nominal dcresistance 20CMaxi
