1、Designation: B835 04 (Reapproved 2009)B835 14Standard 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
2、 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.1. Scope1.1 This specification covers bare compact round stranded conductors made from uncoated
3、 copper wires of a single input wire(SIW) diameter for general use in covered or insulated electrical wires or cables. These conductors shall be constructed with oneor more layers of helically laid compacted wires (Explanatory Note 1, Note 2, and Note 3).1.2 The values stated in inch-pound units are
4、 to be regarded as standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information only and are not considered standard.1.2.1 For density, resistivity and temperature, the values stated in SI units are to be regarded as standard.1.3 This standard d
5、oes not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.2. Referenced Documents2.1 The follo
6、wing documents of the issue in effect on date of material purchase form a part of this specification to the extentreferenced herein.2.2 ASTM Standards:2B3 Specification for Soft or Annealed Copper WireB263 Test Method for Determination of Cross-Sectional Area of Stranded ConductorsB354 Terminology R
7、elating to Uninsulated Metallic Electrical Conductors2.3 NIST Document:3NBS Handbook 100 Handbook 100Copper Copper Wire Tables3. Classification3.1 The conductors described in this specification are intended for subsequent insulation or covering. The classification of theseconductors is SIW compact.4
8、. Ordering Information4.1 Orders for material in accordance with this specification shall 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 1516), if required;4.1.4 Special package marking; and
9、4.1.5 Place of inspection (Section 1415).5. Requirements for Wires5.1 Before stranding and compacting, the copper wire shall meet all of the requirements of Specification B3.1 This specification is under the jurisdiction of ASTM Committee B01 on Electrical Conductors and is the direct responsibility
10、 of Subcommittee B01.04 on Conductorsof Copper and Copper Alloys.Current edition approved Oct. 1, 2009Sept. 1, 2014. Published January 2010September 2014. Originally approved in 1993. Last previous edition approved in 20042009as B835 04.B835 04 (2009). DOI: 10.1520/B0835-04R09.10.1520/B0835-14.2 For
11、 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 standardsstandards Document Summary page on the ASTM website.3 Available from National Institute of Standards and Tech
12、nology (NIST), 100 Bureau Dr., Stop 1070, Gaithersburg, MD 20899-1070, http:/www.nist.gov.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 to the previous version. Becauseit may not be technically possible
13、 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.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West C
14、onshohocken, PA 19428-2959. United States16. Joints6.1 Welds and brazes may be made in rods or in wires prior to final drawing.6.2 Welds and brazes may be made in the individual wires for compact conductors, but they shall not be closer together than1 ft (0.3 m) for conductor of 19 wires or less or
15、closer than 1 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-stranded conductor as a whole.7. Lay7.1 The length of lay shall not be less than 8 or more than 16 times the outside diameter of the completed conductor.7.2 The direction of lay
16、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 furnished upon special agreement between the manufacturer and the purchaser.8. Construction8.1 The construction of the compact round SIW stranded conductors shall be
17、 as given in Table 1.8.2 Wires used in the fabrication of the compact round conductor shall be of such dimensions as to produce a finished conductoras prescribed in Table 1.9. Density9.1 For the purpose of calculating mass per unit length, cross sections, and so forth, the density of the copper shal
18、l be takenas 8.89 g/cm3 (0.32117 lb/in.3) at 20C.10. Density Mass and Electrical Resistance9.1 For the purpose of calculating mass per unit length, cross sections, and so forth, the density of the copper shall be takenas 8.89 g/cm3 (0.32117 lb/in.3) at 20C.10.1 The mass and electrical resistance of
19、a unit length of stranded unsealed conductor are a function of the length of lay. Theapproximate mass and electrical resistance may be determined using the standard increments shown inan increment of 2 %. Table2. When greater accuracy is desired, the increment based on the specific lay of the conduc
20、tor may be calculated (Explanatory Note4).10.2 The maximum electrical resistance of a unit length of stranded conductor shall not exceed 102 % of the nominal dcresistance shown in Table 1. When the dc resistance is measured at other than 20C, it is to be corrected by using the multiplyingfactor give
21、n in Table 2.10.3 For conductors to be used in covered or insulated wires or cables, dc resistance measurement may be used instead of themethod outlined in Section 1011, to determine compliance with this specification.TABLE 1 Construction Requirements of Compact Round SIW-Stranded Copper ConductorsC
22、onductor Size MinimumNumber of WiresCompact Conductor Diameter Mass/1000 ft,lb/1000 ftMass/km,kg/kmdc Resistance at 20CCircular, mils AWG mm2 in. mm /1000 ft /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 0.0386800 000 . 405 53 0.938 23.8 2469 36
23、80 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 0.0192 0.0630500 000 . 253 30 0.736 18.7 1
24、542 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 1150 0.0423 0.139211 600 4/0 107 17 0.475 12
25、.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 0.159 0.52141 740 4 21.2 6 0.213 5.41 129 192
26、 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 2.10B835 14211. Variation in Area11.1 The cross-sectional area of the compact round conductor shall not be less than 98 % of the cross-sectional area as specifiedin Column 1 of Table 1.11.2 The manuf
27、acturer shall determine the cross-sectional area by Test Method B263. In applying this test method, theincrement in mass per unit length resulting from stranding may be the applicable value specified in 10.1 or may be calculated fromthe measured dimensions of the sample under test. In case of a ques
28、tion regarding area compliance, the actual mass per unit lengthincrement due to stranding shall be calculated.12. Variation in Diameter12.1 The average diameter of the compact round conductor shall not vary by more than plus 1 % and minus 2 % from thediameter specified in Table 1.13. Finish13.1 The
29、conductor surface shall be smooth and free of imperfections not consistent with the best commercial practice.14. Physical and Electrical Tests14.1 Tests for the physical and electrical properties of wires composing the conductors shall be made before stranding inaccordance with Specification B3 (Exp
30、lanatory Note 5 and Note 6).15. Inspection15.1 All tests and inspection shall be made at the place of manufacture, unless otherwise especially agreed upon between themanufacturer and the purchaser at the time of purchase. The manufacturer shall afford the inspector representing the purchaser allreas
31、onable facilities, without charge, to satisfy him that the material is being furnished in accordance with this specification.16. Packaging and Package Marking16.1 Package sizes for conductors shall be agreed upon by the manufacturer and the purchaser during the placing of individualorders.16.2 The c
32、onductors shall be protected from damage during ordinary handling and shipping.16.3 The net mass, length, size, kind of conductor, purchase order number, and any other marks required by the purchase ordershall be marked on a tag attached to the end of the conductor inside of the package. The same in
33、formation, together with themanufacturers serial number (if any) and all shipping marks required by the purchaser, shall appear on the outside of eachpackage.17. Keywords17.1 compact copper conductor; compact round SIW stranded copper conductor; copper electrical conductor; electricalconductor; elec
34、trical conductorcopper; SIW stranded copper conductor; stranded copper conductorTABLE 2 Temperature Correction Factors for ConductorResistanceTemperature,C Multiplying Factor forReductionCorrection to 20C0 1.0855 1.06310 1.04115 1.02020 1.00025 0.98130 0.96235 0.94440 0.92745 0.91150 0.89555 0.87960
35、 0.86465 0.85070 0.83675 0.82280 0.80985 0.79790 0.784B835 143B835 144EXPLANATORY NOTESNOTE 1In this specification, only compact round single input wire stranded conductor constructions are specifically designated. Constructions notincluded in this specification should be specifically agreed upon be
36、tween the manufacturer and the purchaser when placing the order.NOTE 2For definitions of terms relating to conductors, reference should be made to Terminology B354.NOTE 3Single Input Wire ConstructionA stranded conductor design methodology that varies the number of wires within a range of conductor
37、sizesin order to permit that range of conductor sizes to be constructed from a single wire size.NOTE 4The increment of weight or electrical resistance of a completed concentric-lay-stranded conductor (k), in %, is as follows:k 5100m 21!where m = the stranding factor and is also the ratio of the weig
38、ht of electrical resistance of a unit length of stranded conductor to that of a solidconductor of the same cross-sectional area or of a stranded conductor with infinite length of lay, that is, all wires parallel to the conductor axis. Thestranding factor m for the completed stranded conductor is the
39、 numerical average of the stranding factors for each of the individual wires in the conductor,including the straight core wire, if any (for which the stranding factor is unity). The stranding factor (mind) for any given wire in a concentric-lay-strandedconductor is as follows:mind=119.8696/n2!where:
40、n 5 length of laydiameter of helical path of the wireNOTE 5Individual wires are not to be unlaid from compact round conductors for testing purposes. The physical properties of the individual compactedwires will be altered by the deformation brought about by compacting, unlaying, and straightening fo
41、r test.NOTE 6To test stranded conductors for tensile strength successfully as a unit requires adequate means of gripping the ends of the test specimen withoutcausing damage that may result in failure below the actual strength of the conductor. Various means are available, such as compression sleeves
42、, splitsleeves, and preformed grips, but ordinary jaws or clamping 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 standard. Users of this standard are expressly advised that dete
43、rmination 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 reviewed every five years andif not revised, either reapproved or
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