1、Designation: B 835 04Standard Specification forCompact Round Stranded Copper Conductors Using SingleInput Wire Construction1This standard is issued under the fixed designation B 835; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision,
2、the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers bare compact round strandedconductors made from uncoated copper wires of a sing
3、le 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 or SI units are to beregarded se
4、parately as standard. The values in each system arenot exact equivalents; therefore, each system shall be usedindependently of the other. Combining values from the twosystems may result in nonconformance with the specification.1.2.1 For density, resistivity and temperature, the valuesstated in SI un
5、its are to be regarded as standard.1.3 This standard does not purport 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 limit
6、ations prior to use.2. Referenced Documents2.1 The following documents of the issue in effect on dateof material purchase form a part of this specification to theextent referenced herein.2.2 ASTM Standards:2B 3 Specification for Soft or Annealed Copper WireB 263 Test Method for Determination of Cros
7、s-SectionalArea of Stranded ConductorsB 354 Terminology Relating to 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 classificat
8、ionof these conductors is SIW compact.4. Ordering Information4.1 Orders 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, or AWG (Section 8);4.1.3 Packaging (Section 15), if require
9、d;4.1.4 Special package marking; and4.1.5 Place of inspection (Section 14).5. Requirements for Wires5.1 Before stranding and compacting, the copper wire shallmeet all of the requirements of Specification B 3.6. Joints6.1 Welds and brazes may be made in rods or in wires priorto final drawing.6.2 Weld
10、s and brazes may be made in the individual wiresfor compact conductors, 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-strandedconduct
11、or as a whole.7. Lay7.1 The length of lay shall not be less than 8 or 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.7.3 Other lay requirements may be furni
12、shed upon specialagreement between the manufacturer and the purchaser.8. Construction8.1 The construction of the compact round SIW strandedconductors shall be as given in Table 1.1This specification is under the jurisdiction of ASTM Committee B01 onElectrical Conductors and is the direct responsibil
13、ity of Subcommittee B01.04 onConductors of Copper and Copper Alloys.Current edition approved Sept. 1, 2004. Published September 2004. Originallyapproved in 1993. Last previous edition approved in 2000 as B 835 00.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Cu
14、stomer 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 3460, Gaithersburg, MD 20899-3460.1Copyright ASTM Interna
15、tional, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.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 uni
16、t length,cross sections, and 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-m
17、ined using the standard increments 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 dcres
18、istance shown in Table 1. When 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
19、, to determine compliancewith 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
20、B 263. In applying this test method, 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 in
21、crement due to stranding shall 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 con
22、sistent with the best commercial practice.13. Physical and Electrical Tests13.1 Tests for the physical and electrical properties of wirescomposing the conductors shall be made before stranding inaccordance with Specification B 3 (Explanatory Note 5 andNote 6).TABLE 1 Construction Requirements of Com
23、pact 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 0.0347900 000 . 456 53 0.999 25.4 2780 4140 0.0118
24、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 0.0176 0.0577550 000 . 279 34 0.775 19.7 1700 2530 0
25、.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 1380 0.0353 0.116250 000 . 127 18 0.520 13.2 772 115
26、0 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 7.60 259 385 0.126 0.41366 350 2 33.6 6 0.268 6.81 205 305 0.15
27、9 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 Reduction to20C0 1.0855 1.06310 1.04115 1.02020 1.00025
28、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 0.784B83504214. 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 p
29、urchase. Themanufacturer 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 b
30、ythe manufacturer and the 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 mark
31、ed on a tag attached to 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 SI
32、Wstranded copper conductor; 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 desig
33、nated. Construc-tions not 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 B 354.NOTE 3Single Input Wire ConstructionA stran
34、ded conductor designmethodology 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
35、%, is as follows:k 5 100 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 para
36、llel to the conductor axis. 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
37、 any given wire in aconcentric-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
38、 be altered by the deformation 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 ac
39、tualstrength of the conductor. 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 an
40、y item mentionedin this standard. 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
41、 committee and must be reviewed 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 a
42、t a meeting of theresponsible 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
43、Drive, PO Box C700, West 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).B835043
