1、Designation: 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 adoption or, in the case
2、 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 Defense.1. Scope1.1 This s
3、pecification covers bare rope-lay-stranded con-ductors having bunch-stranded members made from roundcopper wires, either uncoated or coated with tin, lead, orlead-alloy for use as electrical conductors (Explanatory Notes1 and 2).1.2 Coated wires shall include only those wires with fin-ished diameter
4、s and densities substantially equal to the respec-tive diameters and densities of uncoated wires.1.3 The values stated in inch-pound or SI units are to beregarded separately as standard. Each system shall be usedindependently of the other. Combining values from the twosystems may result in nonconfor
5、mance with the specification.For conductor sizes designated by AWG or kcmil, the require-ments in SI units have been numerically converted fromcorresponding values, stated or derived, in inch-pound units.For conductor sizes designated by SI units only, the require-ments are stated or derived in SI u
6、nits.1.3.1 For density, resistivity, and temperature, the valuesstated in SI units are to be regarded as standard.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment o
7、f International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 The following documents of the issue in effect at thetime of reference form a part of this specification to the extentreferenced herein:
8、2.2 ASTM Standards:2B3 Specification for Soft or Annealed Copper WireB33 Specification for Tin-Coated Soft or Annealed CopperWire for Electrical PurposesB173 Specification for Rope-Lay-Stranded Copper Conduc-tors Having Concentric-Stranded Members, for ElectricalConductorsB189 Specification for Lead
9、-Coated and Lead-Alloy-CoatedSoft Copper Wire for Electrical PurposesB193 Test Method for Resistivity of Electrical ConductorMaterialsB263 Test Method for Determination of Cross-SectionalArea of Stranded ConductorsB354 Terminology Relating to Uninsulated Metallic Electri-cal Conductors2.3 American N
10、ational Standard:ANSI C42.35 Definitions of Electrical Terms33. Classification3.1 For the purpose of this specification rope-lay-strandedconductors having bunch-stranded members are classified asfollows:3.1.1 Class IConductors consisting of wires 0.0201-in.(0.511-mm) diameter (No. 24 AWG) to produce
11、 rope-lay-stranded conductors up to 2 000 000 cmil (1013 mm2) in totalcross-sectional area. (Typical use is for special apparatusconductor.)3.1.2 Class KConductors consisting of wires 0.0100-in.(0.254-mm) diameter (No. 30 AWG) to produce rope-lay-stranded conductors up to 1 000 000 cmil (507 mm2) in
12、 totalcross-sectional area. (Typical use is for special portable cordand conductors.)1This specification is under the jurisdiction of ASTM Committee B01 onElectrical Conductors and is the direct responsibility of Subcommittee B01.04 onConductors of Copper and Copper Alloys.Current edition approved A
13、pril 1, 2017. Published April 2017. Originallyapproved in 1942 to replace portions of B158 41 T. Last previous edition approvedin 2015 as B172 10 (2015). DOI: 10.1520/B0172-17.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. Fo
14、r Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Bo
15、x C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by t
16、he World Trade Organization Technical Barriers to Trade (TBT) Committee.13.1.3 Class MConductors consisting of wires 0.0063-in.(0.160-mm) diameter (No. 34 AWG) to produce rope-lay-stranded conductors up to 1 000 000 cmil (507 mm2) in totalcross-sectional area. (Typical use is for welding conductors.
17、)4. Ordering Information4.1 Orders for material under this specification shall includethe 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
18、 typeof coating (see 11.1),4.1.5 Details of special-purpose lays, if required (see 6.2,6.3, and Explanatory Note 3),4.1.6 Package size (see 15.1),4.1.7 Special package marking, if required (Section 14),4.1.8 Lagging, if required (see 15.2), and4.1.9 Place of inspection (Section 13).5. Joints5.1 Nece
19、ssary joints in wires or in groups of wires shall bemade in accordance with accepted commercial practice, takinginto account the size of the wire or group of wires as related tothe size of the entire conductor.TABLE 1 Construction Requirements of Class I Rope-Lay Stranded Copper Conductors Having Bu
20、nch Stranded MembersAUncoated Copper Coated CopperArea of Cross SectionSizeAWGWireDiameter0.0201in.(0.511mm)ApproximateMassBNominaldc resistance 20CMaximumdc resistance 20CNominaldc resistance 20CMaximumdc resistance 20Ccmil mm2NominalNumberof WiresStrandConstructionAbyBbyCClb/1000 ft.kg/kmOhm / kft
21、 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 0.0199 0.00619 0.02031 800 000 912 . . . 4522
22、 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 0.0214 0.00666 0.0218 0.00679 0.0223 0.00693 0.0227
23、1 600 000 811 . . . 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 4525 6734 0.00793 0.0260 0.00809 0.0265 0.008
24、24 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 . . . 2926 19 by 7 by 22 3829 5698 0.00925 0.0
25、303 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 0.0387900 000 456 . . . 2261 19 by 7 by 17 2959 44
26、03 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 0.0157 0.0515700 000 355 . . . 1729 19 by 7 by 13 2
27、262 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 0.0195 0.0638550 000 279 . . . 1372 7 by 7 by
28、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 0.0834 0.0259 0.0850400 000 203 . . . 980 7 by 7 b
29、y 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 0.0389 0.128250 000 127 . . . 637 7 by 7 by 13 826
30、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 19 by 18 439 654 0.0818 0.268 0.0834 0.273 0.08
31、51 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 0.172 0.56652 620 26.7 3 133 7 by 19 169 252
32、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 1.38 0.427 1.40 0.436 1.43AThe constructions sho
33、wn in this table are typical of those used in the industry. It is not intended that this table preclude other constructions which may be desirable forspecific applications. The constructions shown provide for finished, covered or non-covered, stranded conductor approximately of the area indicated. W
34、hen specified bythe purchaser, the number of strands may be increased to provide additional area to compensate for draw-down during subsequent processing.BValues for the mass of the completed conductor are approximate. The mass values are based upon the standard stranding increments listed in Explan
35、atory Note 6.CStrand 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-stranded members in the conductor. Where #A is not given, the c
36、onductor 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 172TABLE2ConstructionRequirementsofClassKRope-LayStrandedCopperConductorsHavingBunchStra
37、ndedMembersAAreaofCrossSectionWire Diameter 0.0100In.(0.254mm)ApproximateMassBUncoatedCopperCoatedCoppercmilmm2SizeAWGNominal Number ofWiresStrand Construction AbyBbyCCLb/1000ftKg/kmNominaldcresistance20CMaximumdcresistance20CNominaldcresistance20CMaximumdcresistance20C1,000,000507.1010137by7by39327
38、248690.01110.03640.01130.03710.01190.03910.01210.0399900,000456.906537by7by35293643690.01230.04050.01250.04130.01320.04340.01350.0443800,000405.798019by7by60258538460.01390.04550.01420.04640.01490.04890.01520.0499750,000380.758119by7by57245536540.01480.04850.01510.04950.01590.05210.01620.0531700,000
39、355.691619by7by52224033330.01590.05200.01620.05300.01700.05580.01730.0569650,000329.651719by7by49211131410.01710.05600.01740.05710.01830.06010.01870.0613600,000304.598519by7by45193828850.01850.06070.01890.06190.01990.06510.02030.0664550,000279.545319by7by41176626280.02020.06620.02060.06750.02170.071
40、10.02210.0725500,000253.505419by7by38163724360.02220.07280.02260.07430.02380.07820.02430.0798450,000228.452219by7by34146521800.02470.08090.02520.08250.02650.08690.02700.0886400,000203.399019by7by30129219230.02770.09100.02830.09280.02980.09770.03040.0997350,000177.345819by7by26112016670.03170.1040.03
41、230.1060.03400.1120.03470.114300,000152.29897by7by6195914270.03660.1200.03730.1220.03930.1290.04010.132250,000127.24997by7by5180211930.04400.1440.04490.1470.04720.1550.04810.158211,600107000021077by7by4367610060.05200.1710.05300.1740.05580.1830.05690.187167,8008500016667by7by345357950.06550.2150.066
42、80.2190.07030.2310.07170.236133,10067.40013237by7by274246320.08260.2710.08430.2760.08870.2910.09050.297105,60053.50106419by563385030.1030.3380.1050.3450.1110.3630.1130.37083,69042.4183619by442663950.1300.4270.1330.4350.1400.4580.1420.46766,36033.6266519by352113150.1640.5380.1670.5490.1760.5780.1800.
43、59052,62026.7353219by281692520.2070.6790.2110.6930.2220.7290.2270.74441,74021.144207by601321970.2580.8480.2640.8650.2770.9100.2830.92833,09016.853367by481061570.3261.070.3331.090.3501.150.3571.1726,24013.362667by38841250.4111.350.4191.380.4411.450.4501.4820,82010.572107by3066980.5181.700.5281.730.55
44、61.820.5671.8616,5108.3781687by2453790.6532.140.6662.190.7012.300.7152.3513,0906.6391337by1942620.8242.700.8402.760.8852.900.9022.96ATheconstructionsshowninthistablearetypicalofthoseusedintheindustry.Itisnotintendedthatthistableprecludeotherconstructionswhichmaybedesirableforspecificapplications.The
45、constructionsshownprovideforfinishedcoveredornon-coveredstrandedconductorapproximatelyoftheareaindicated.Whenspecifiedbythepurchaser,thenumberofstrandsmaybeincreasedtoprovideadditionalareatocompensatefordraw-downduringsubsequentprocessing.BValuesforthemassofthecompletedconductorareapproximate.Themas
46、svaluesarebaseduponthestandardstrandingincrementslistedinExplanatoryNote6.CStrandconstructionAbyBbyCwhereCisthenumberofwiresineachbunch-strandedmember,Bisthenumberofbunch-strandedmemberswhichmakeupeachropestrandedmember,andA(whereused)isthenumberofrope-strandedmembersintheconductor.WhereAisnotgiven,
47、theconductorconsistsofonerope-strandedmember.Forexample,19by7by32indicatesaconstructionconsistingof19rope-strandedmemberseachofwhichconsistof7bunch-strandedmemberswith32wireseach.B172 173TABLE3ConstructionrequirementsofClassMRope-LayStrandedCopperConductorsHavingBunchStrandedMembersAAreaofCrossSecti
48、onWireDiameter0.0063In.(0.160mm)ApproximateMassBUncoatedCopperCoatedCoppercmilmm2SizeAWGNominalNumberofWiresStrandConstructionAbyBbyCCLb/1000ftKg/kmNominaldcresistance20CMaximumdcresistance20CNominaldcresistance20CMaximumdcresistance20COhm/kftOhm/kmOhm/kftOhm/kmOhm/kftOhm/kmOhm/kftOhm/km1,000,000507
49、.25,19361by7by59323948190.01110.03640.01130.03710.01190.03910.01210.0399900,000456.22,63161by7by53290943290.01230.04040.01250.04130.01320.04340.01350.0443800,000405.20,06961by7by47258038390.01390.04560.01420.04640.01490.04890.01520.0499750,00380.18,78861by7by44241535940.01480.04860.01510.04950.01590.05210.01620.0531700,000355.17,50761by7by41225133490.01590.05220.01620.05300.01700.05580.01730.0569650,000329.16,22661by7by38208631040.01710.05610.01740.05710.01830.06010.01870.0613600,000304.14,945
