1、Designation: B835 04 (Reapproved 2009)Standard Specification forCompact Round Stranded Copper Conductors Using SingleInput Wire Construction1This standard is issued under the fixed designation B835; the number immediately following the designation indicates the year oforiginal adoption or, in the ca
2、se 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.1. Scope1.1 This specification covers bare compact round strandedconductors made from uncoated copper
3、wires of a single inputwire (SIW) diameter for general use in covered or insulatedelectrical wires or cables. These conductors shall be con-structed with one or more layers of helically laid compactedwires (Explanatory Note 1, Note 2, and Note 3).1.2 The values stated in inch-pound units are to be r
4、egardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.2.1 For density, resistivity and temperature, the valuesstated in SI units are to be regarded as standard.1.3 This standard does not pur
5、port to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 The following docu
6、ments of the issue in effect on dateof material purchase form a part of this specification to theextent referenced herein.2.2 ASTM Standards:2B3 Specification for Soft or Annealed Copper WireB263 Test Method for Determination of Cross-SectionalArea of Stranded ConductorsB354 Terminology Relating to
7、Uninsulated Metallic Elec-trical Conductors2.3 NIST Document:3NBS Handbook 100Copper Wire Tables3. Classification3.1 The conductors described in this specification are in-tended for subsequent insulation or covering. The classificationof these conductors is SIW compact.4. Ordering Information4.1 Ord
8、ers for material in accordance with this specificationshall include the following information:4.1.1 Quantity of each size (Table 1);4.1.2 Conductor size, circular-mil area, orAWG (Section 8);4.1.3 Packaging (Section 15), if required;4.1.4 Special package marking; and4.1.5 Place of inspection (Sectio
9、n 14).5. Requirements for Wires5.1 Before stranding and compacting, the copper wire shallmeet all of the requirements of Specification B3.6. Joints6.1 Welds and brazes may be made in rods or in wires priorto final drawing.6.2 Welds and brazes may be made in the individual wiresfor compact conductors
10、, but they shall not be closer togetherthan 1 ft (0.3 m) for conductor of 19 wires or less or closer than1 ft (0.3 m) in a layer for conductor of more than 19 wires.6.3 No joint or splice shall be made in a compact-strandedconductor as a whole.7. Lay7.1 The length of lay shall not be less than 8 or
11、more than16 times the outside diameter of the completed conductor.7.2 The direction of lay of the outer layer shall be left-hand,and it may be reversed or unidirectional in successive layers.1This specification is under the jurisdiction of ASTM Committee B01 onElectrical Conductors and is the direct
12、 responsibility of Subcommittee B01.04 onConductors of Copper and Copper Alloys.Current edition approved Oct. 1, 2009. Published January 2010. Originallyapproved in 1993. Last previous edition approved in 2004 as B835 04. DOI:10.1520/B0835-04R09.2For referenced ASTM standards, visit the ASTM website
13、, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from National Institute of Standards and Technology (NIST), 100Bureau Dr., Stop 1070, Gaithersburg, MD 2
14、0899-1070, http:/www.nist.gov.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7.3 Other lay requirements may be furnished upon specialagreement between the manufacturer and the purchaser.8. Construction8.1 The construction of the com
15、pact round SIW strandedconductors shall be as given in Table 1.8.2 Wires used in the fabrication of the compact roundconductor shall be of such dimensions as to produce a finishedconductor as prescribed in Table 1.9. Density9.1 For the purpose of calculating mass per unit length,cross sections, and
16、so forth, the density of the copper shall betaken as 8.89 g/cm3(0.32117 lb/in.3) at 20C.9.2 The mass and electrical resistance of a unit length ofstranded unsealed conductor are a function of the length of lay.The approximate mass and electrical resistance may be deter-mined using the standard incre
17、ments shown in Table 2. Whengreater accuracy is desired, the increment based on the specificlay of the conductor may be calculated (Explanatory Note 4).9.3 The maximum electrical resistance of a unit length ofstranded conductor shall not exceed 102 % of the nominal dcresistance shown in Table 1. Whe
18、n the dc resistance ismeasured at other than 20C, it is to be corrected by using themultiplying factor given in Table 2.9.4 For conductors to be used in covered or insulated wiresor cables, dc resistance measurement may be used instead ofthe method outlined in Section 10, to determine compliancewith
19、 this specification.10. Variation in Area10.1 The cross-sectional area of the compact round conduc-tor shall not be less than 98 % of the cross-sectional area asspecified in Column 1 of Table 1.10.2 The manufacturer shall determine the cross-sectionalarea by Test Method B263. In applying this test m
20、ethod, theincrement in mass per unit length resulting from stranding maybe the applicable value specified in 10.1 or may be calculatedfrom the measured dimensions of the sample under test. In caseof a question regarding area compliance, the actual mass perunit length increment due to stranding shall
21、 be calculated.11. Variation in Diameter11.1 The average diameter of the compact round conductorshall not vary by more than plus 1 % and minus 2 % from thediameter specified in Table 1.12. Finish12.1 The conductor surface shall be smooth and free ofimperfections not consistent with the best commerci
22、al practice.TABLE 1 Construction Requirements of Compact Round SIW-Stranded Copper ConductorsConductor SizeMinimumNumber of WiresCompact Conductor DiameterMass/1000 ft,lb/1000 ftMass/km,kg/kmdc Resistance at 20CCircular, mils AWG mm2in. mm V/1000 ft V/km1 000 000 . 507 53 1.060 26.9 3086 4590 0.0106
23、 0.0347900 000 . 456 53 0.999 25.4 2780 4140 0.0118 0.0386800 000 . 405 53 0.938 23.8 2469 3680 0.0132 0.0433750 000 . 380 53 0.908 23.0 2316 3450 0.0141 0.0462700 000 . 355 34 0.877 22.3 2160 3220 0.0151 0.0495650 000 . 329 34 0.845 21.4 2006 2990 0.0163 0.0535600 000 . 304 34 0.813 20.6 1850 2760
24、0.0176 0.0577550 000 . 279 34 0.775 19.7 1700 2530 0.0192 0.0630500 000 . 253 30 0.736 18.7 1542 2300 0.0212 0.0695450 000 . 228 30 0.700 17.8 1390 2070 0.0235 0.0770400 000 . 203 24 0.659 16.7 1236 1840 0.0264 0.0865350 000 . 177 24 0.616 15.7 1080 1610 0.0302 0.0990300 000 . 152 18 0.570 14.5 925
25、1380 0.0353 0.116250 000 . 127 18 0.520 13.2 772 1150 0.0423 0.139211 600 4/0 107 17 0.475 12.1 653 972 0.0500 0.164167 800 3/0 85.0 15 0.423 10.8 518 771 0.0630 0.206133 100 2/0 67.4 12 0.376 9.57 411 611 0.0795 0.261105 600 1/0 53.5 7 0.336 8.55 326 485 0.100 0.32883 690 1 42.4 7 0.299 7.60 259 38
26、5 0.126 0.41366 350 2 33.6 6 0.268 6.81 205 305 0.159 0.52141 740 4 21.2 6 0.213 5.41 129 192 0.253 0.83026 240 6 13.3 6 0.169 4.29 80.9 121 0.403 1.3216 510 8 8.37 6 0.134 3.40 51.0 75.9 0.641 2.10TABLE 2 Temperature Correction Factors for ConductorResistanceTemperature,CMultiplying Factor for Redu
27、ction to20C0 1.0855 1.06310 1.04115 1.02020 1.00025 0.98130 0.96235 0.94440 0.92745 0.91150 0.89555 0.87960 0.86465 0.85070 0.83675 0.82280 0.80985 0.79790 0.784B835 04 (2009)213. Physical and Electrical Tests13.1 Tests for the physical and electrical properties of wirescomposing the conductors shal
28、l be made before stranding inaccordance with Specification B3 (Explanatory Note 5 andNote 6).14. Inspection14.1 All tests and inspection shall be made at the place ofmanufacture, unless otherwise especially agreed upon betweenthe manufacturer and the purchaser at the time of purchase. Themanufacture
29、r shall afford the inspector representing the pur-chaser all reasonable facilities, without charge, to satisfy himthat the material is being furnished in accordance with thisspecification.15. Packaging and Package Marking15.1 Package sizes for conductors shall be agreed upon bythe manufacturer and t
30、he purchaser during the placing ofindividual orders.15.2 The conductors shall be protected from damage duringordinary handling and shipping.15.3 The net mass, length, size, kind of conductor, purchaseorder number, and any other marks required by the purchaseorder shall be marked on a tag attached to
31、 the end of theconductor inside of the package. The same information, to-gether with the manufacturers serial number (if any) and allshipping marks required by the purchaser, shall appear on theoutside of each package.16. Keywords16.1 compact copper conductor; compact round SIWstranded copper conduc
32、tor; copper electrical conductor; elec-trical conductor; electrical conductorcopper; SIW strandedcopper conductor; stranded copper conductorEXPLANATORY NOTESNOTE 1In this specification, only compact round single input wirestranded conductor constructions are specifically designated. Construc-tions n
33、ot included in this specification should be specifically agreed uponbetween the manufacturer and the purchaser when placing the order.NOTE 2For definitions of terms relating to conductors, referenceshould be made to Terminology B354.NOTE 3Single Input Wire ConstructionAstranded conductor designmetho
34、dology that varies the number of wires within a range of conductorsizes in order to permit that range of conductor sizes to be constructedfrom a single wire size.NOTE 4The increment of weight or electrical resistance of a com-pleted concentric-lay-stranded conductor (k), in %, is as follows:k 5 100
35、m 2 1!where m = the stranding factor and is also the ratio of the weight ofelectrical resistance of a unit length of stranded conductor to that of a solidconductor of the same cross-sectional area or of a stranded conductor withinfinite length of lay, that is, all wires parallel to the conductor axi
36、s. Thestranding factor m for the completed stranded conductor is the numericalaverage of the stranding factors for each of the individual wires in theconductor, including the straight core wire, if any (for which the strandingfactor is unity). The stranding factor (mind) for any given wire in aconce
37、ntric-lay-stranded conductor is as follows:mind=1 1 9.8696/n2!where:n5length of laydiameter of helical path of the wireNOTE 5Individual wires are not to be unlaid from compact roundconductors for testing purposes. The physical properties of the individualcompacted wires will be altered by the deform
38、ation brought about bycompacting, unlaying, and straightening for test.NOTE 6To test stranded conductors for tensile strength successfullyas a unit requires adequate means of gripping the ends of the test specimenwithout causing damage that may result in failure below the actualstrength of the condu
39、ctor. Various means are available, such as compres-sion sleeves, split sleeves, and preformed grips, but ordinary jaws orclamping devices are usually not suitable.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this s
40、tandard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be re
41、viewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of therespons
42、ible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West
43、Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).B835 04 (2009)3
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