1、Designation: B172 10Standard 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 Department of Defense.1. Scope1.1 This specif
3、ication 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 diameters and
4、 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 nonconformance
5、 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 units.
6、1.3.1 For density, resistivity, and temperature, the valuesstated in SI units are to be regarded as standard.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:2.2 ASTM Standards:2B3 Speci
7、fication for Soft or Annealed Copper WireB33 Specification for Tin-Coated Soft or Annealed CopperWire for Electrical PurposesB173 Specification for Rope-Lay-Stranded Copper Con-ductors Having Concentric-Stranded Members, for Elec-trical ConductorsB189 Specification for Lead-Coated and Lead-Alloy-Coa
8、ted Soft 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 Elec-trical Conductors2.3 American National Standard:ANSI C42
9、.35 Definitions of Electrical Terms33. Classification3.1 For the purpose of this specification rope-lay-strandedconductors having bunch-stranded members are classifed asfollows:3.1.1 Class IConductors consisting of wires 0.0201-in.(0.511-mm) diameter (No. 24 AWG) to produce rope-lay-stranded conduct
10、ors 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 totalcross-sectional area
11、. (Typical use is for special portable cordand conductors.)3.1.3 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.)4. Ordering I
12、nformation4.1 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 typeof coatin
13、g (see 11.1),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 April 1, 2010. Published May 2010. Originallyapproved in 1942 to replace
14、portions of B15841 T. Last previous edition approvedin 2007 as B172 01a (2007)1. DOI: 10.1520/B0172-10.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards
15、 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.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4.1.5 Details of
16、 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 Necessary joints in wires or in groups of wires
17、 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.5.2 Bunch-stranded members or rope-stranded membersforming the completed conductor may be joined as a unit bysoldering, brazing, or w
18、elding.5.3 Joints shall be so constructed and so disposed through-out the conductor that the diameter or configuration of thecompleted conductor is not substantially affected, and so thatthe flexibility of the completed conductor is not adverselyaffected.6. Lay (Explanatory Note 3)6.1 Conductors of
19、the same size and description furnishedon one order shall have the same lay.TABLE 1 Construction Requirements of Class I Rope-Lay Stranded Copper Conductors Having Bunch Stranded MembersAUncoated Copper Coated CopperArea of Cross SectionSizeAWGWireDiameter0.0201in.(0.511mm)ApproximateMassBNominaldc
20、resistance 20CMaximumdc resistance 20CNominaldc resistance 20CMaximumdc resistance 20Ccmil mm2NominalNumberof WiresStrandConstructionAbyBbyCClb/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.
21、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 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
22、.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 0.02271 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 1
23、9 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 0.00824 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
24、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 0.0303 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.
25、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 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
26、.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 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.
27、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 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
28、 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 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
29、 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 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
30、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 0.0851 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
31、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 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
32、 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 shown in this table are typical of those used in the industry. It is not intended that this table preclude other constructions which may
33、be desireablefor specific applications. The constructions shown provide for finished, covered or non-covered, stranded conductor approximately of the area indicated. When specifiedby the purchaser, the number of strands may be increased to provide additional area to compensate for draw-down during s
34、ubsequent processing.BValues for the mass of the completed conductor are approximate. The mass values are based upon the standard stranding increments listed in Explanatory 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 b
35、unch stranded members whichmake-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 ofone rope-stranded member. For example, 19 by 7 by 32 indicates a construction consisting of 19 rope-stranded memb
36、ers, each of which consists of 7 bunch-strandedmembers with 32 wires each.B172 102TABLE 2 Construction Requirements of Class K Rope-Lay Stranded Copper Conductors Having Bunch Stranded MembersAArea of Cross Section Wire Diameter0.0100 In.(0.254 mm)Approximate MassBUncoated Copper Coated Coppercmil m
37、m2Size AWG NominalNumberof WiresStrand ConstructionAbyBbyCCLb/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 3
38、5 2936 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
39、0.0159 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 0.066
40、2 0.0206 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 0.0
41、928 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.
42、158211,600 107 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 10
43、64 19 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 0.72
44、9 0.227 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
45、 0.556 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 2.96AThe constructions shown in this table are typical of those used in the industry. It is not intended that this table preclude ot
46、her 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 compens
47、atefor 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 Explanatory Note 6.CStrand construction A by B by C where C is the number of wires in each bunch-stranded member,
48、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
49、 rope-strandedmembers each of which consist of 7 bunch-stranded members with 32 wires each.B172103TABLE 3 Construction requirements of Class M Rope-Lay Stranded Copper Conductors Having Bunch Stranded MembersAArea of Cross Section Wire Diameter0.0063 In.(0.160 mm)Approximate MassBUncoated Copper Coated Coppercmil mm2Size AWG NominalNumber of WiresStrand ConstructionAbyBbyCCLb/1000 ft Kg/km Nominal dcresistance 20CMaximum dcresistance 20CNominal dcresistance 20CMaximum dcresistance 20COhm/kft Ohm/km Ohm/kft Ohm/km
