1、Designation: B902 04a (Reapproved 2010)B902 13Standard Specification forCompressed Round Stranded Copper Conductors, Hard,Medium-Hard, or Soft Using Single Input Wire Construction1This standard is issued under the fixed designation B902; the number immediately following the designation indicates the
2、 year oforiginal adoption or, in 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 stranded conductors made
3、from round copper wires, either uncoated or coated with tin, lead, orlead alloy for general use in insulated conductor assemblies for electrical purposes. These conductors shall be composed of oneor more roller shaped or die closed layers of helically laid wires using the single input wire (SIW) met
4、hodology. (see Note 1 andExplanatory Note 1)NOTE 1Sealed conductors which are intended to prevent longitudinal water propagation and are further covered/insulated, are also permitted withinthe guidelines of this specification.1.2 The values stated in inch-pound or SI units are to be regarded separat
5、ely as standard.The values in each system are not exactequivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may resultin nonconformance with the specification.1.2.1 For density, resistivity, and temperature, the values stated in SI units
6、 are to be regarded as standard.2. Referenced Documents2.1 ASTM Standards:2B1 Specification for Hard-Drawn Copper WireB2 Specification for Medium-Hard-Drawn Copper WireB3 Specification for Soft or Annealed Copper WireB33 Specification for Tin-Coated Soft or Annealed Copper Wire for Electrical Purpos
7、esB189 Specification for Lead-Coated and Lead-Alloy-Coated Soft Copper Wire for Electrical PurposesB193 Test Method for Resistivity of Electrical Conductor MaterialsB246 Specification for Tinned Hard-Drawn and Medium-Hard-Drawn Copper Wire for Electrical PurposesB263 Test Method for Determination of
8、 Cross-Sectional Area of Stranded ConductorsB354 Terminology Relating to Uninsulated Metallic Electrical Conductors2.2 Other Standard:3NBS Handbook 100: Copper Wire Tables3. Classification3.1 The conductors described in this specification are intended for subsequent insulation or covering. The class
9、ification of theseconductors is SIW compressed.4. Ordering Information4.1 Orders for material under this specification shall include the following information:4.1.1 Quantity of each size,4.1.2 Conductor size: circular-mil area or AWG (see Section 7),4.1.3 Class: SIW compressed (see 1.2 and Table 1),
10、1 This specification is under the jurisdiction of ASTM Committee B01 of Electrical Conductors and is the direct responsibility of Subcommittee B01.04 on Conductorsof Copper and Copper Alloys.Current edition approved Oct. 1, 2010Feb. 1, 2013. Published December 2010February 2013. Originally approved
11、in 2000. Last previous edition approved in 20042010as B902 04a.B902 04a (2010). DOI: 10.1520/B0902-04AR10.10.1520/B0902-13.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, ref
12、er to the standards Document Summary page on the ASTM website.3 Available from National Technical Information Service, 5285 Port Royal Road, Springfield, VA 22161.Service (NTIS), 5301 Shawnee Rd., Alexandria, VA 22312,http:/www.ntis.gov.This document is not an ASTM standard and is intended only to p
13、rovide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof t
14、he standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14.1.4 Temper (see 5.3),4.1.5 Whether coated or uncoated; if coated (see 5.1 and 5.2).4.1.6 Details of special-p
15、urpose lays, if required (see 7.3).4.1.7 When physical tests shall be made (see Sections 10.29 and 10.310).4.1.8 Package size (see 16.1).4.1.9 Lagging, if required (see 16.2).4.1.10 Special package marking, if required (see Section 16.3), and4.1.11 Place of inspection (see Section 15).TABLE 1 Constr
16、uction Requirements of Compressed Round SIW Standard Copper ConductorsCompressed Strand DimensionsConductor SizeMinimumNumber ofNominalDiameterof SIWCompressedConductor,NominalDiameterof SIWCompressedConductor, Mass DC Resistance at 20Ccmils AWG mm2 Wires in. mm. lb/1000ft kg/km /1000ft /km5 000 000
17、 2534 217 2.424 61.57 15890 23649 0.00218 0.007154 500 000 2280 217 2.300 58.41 14300 21283 0.00242 0.007944 000 000 2027 217 2.168 55.07 12590 18738 0.00270 0.008863 500 000 1773 169 2.028 51.51 11020 16401 0.00308 0.010103 000 000 1520 169 1.878 47.69 9353 13920 0.00365 0.011972 500 000 1267 127 1
18、.714 43.54 7794 11600 0.00428 0.014042 000 000 1013 127 1.533 38.94 6175 9190 0.00529 0.017351 900 000 962.7 127 1.494 37.95 5866 8730 0.00557 0.018271 800 000 912.1 127 1.454 36.93 5558 8272 0.00588 0.019291 750 000 886.7 127 1.434 36.42 5403 8041 0.00604 0.019811 700 000 861.4 127 1.413 35.89 5249
19、 7812 0.00622 0.020401 600 000 810.7 127 1.371 34.82 4940 7352 0.00661 0.021681 500 000 760.1 90 1.327 33.71 4631 6892 0.00705 0.023121 400 000 709.4 90 1.282 32.56 4323 6434 0.00756 0.024801 300 000 658.7 90 1.236 31.39 4014 5974 0.00814 0.026701 250 000 633.4 90 1.212 30.78 3859 5743 0.00847 0.027
20、781 200 000 608.0 90 1.187 30.15 3705 5514 0.00882 0.028931 100 000 557.4 90 1.137 28.88 3396 5054 0.00962 0.031551 000 000 506.7 53 1.084 27.53 3088 4596 0.0106 0.0348900 000 456.0 53 1.028 26.11 2779 4136 0.0118 0.3087800 000 405.4 53 0.969 24.61 2470 3676 0.0132 0.0433750 000 380.0 53 0.939 23.85
21、 2316 3447 0.0141 0.0462700 000 354.7 34 0.907 23.04 2161 3216 0.0151 0.0495650 000 329.4 34 0.874 22.20 2007 2987 0.0163 0.0535600 000 304.0 34 0.840 21.34 1883 2802 0.0177 0.0581550 000 278.7 34 0.804 20.42 1698 2527 0.0192 0.0630500 000 253.4 30 0.766 19.46 1544 2298 0.0212 0.0695450 000 228.0 30
22、 0.727 18.47 1389 2067 0.0235 0.0771400 000 202.7 24 0.685 17.40 1235 1838 0.0264 0.0866350 000 177.3 24 0.641 16.28 1081 16.09 0.3002 0.0991300 000 152.0 18 0.594 15.09 926.3 1379 0.0353 0.1158250 000 126.7 18 0.542 13.77 771.9 1149 0.0423 0.1387211 600 0000 107.2 17 0.498 12.65 653.1 972.0 0.0500
23、0.1640167 800 000 85.03 15 0.443 11.25 518.1 771.1 0.0630 0.2066133 100 00 67.44 12 0.395 10.03 410.9 611.5 0.0795 0.2607105 600 0 53.51 7 0.352 8.94 325.8 484.9 0.100 0.32883 690 1 42.41 7 0.313 7.95 258.4 384.6 0.127 0.41766 360 2 33.63 6 0.283 7.19 204.9 305.0 0.159 0.52152 620 3 26.66 6 0.252 6.
24、40 162.5 241.8 0.201 0.65941 740 4 21.15 6 0.225 5.72 128.9 191.8 0.253 0.83033 090 5 16.77 6 0.200 5.08 102.2 152.1 0.319 1.04626 240 6 13.30 6 0.178 4.52 81.05 120.6 0.403 1.32220 820 7 10.55 6 0.159 4.04 64.28 95.67 0.509 1.66916 510 8 8.366 6 0.142 3.61 50.97 75.86 0.640 2.09913 090 9 6.633 6 0.
25、126 3.20 40.42 60.16 0.809 2.65310 380 10 5.260 6 0.113 2.87 32.06 47.71 1.02 3.356 530 12 3.309 6 0.089 2.26 20.16 30.00 1.63 5.354 110 14 2.083 6 0.071 1.80 12.68 18.87 2.58 8.462 580 16 1.307 6 0.054 1.37 7.974 11.87 4.10 13.451 620 18 0.8209 6 0.043 1.09 5.015 7.464 6.54 21.451 020 20 0.5168 6 0
26、.034 0.86 3.154 4.694 10.3 33.8640 22 0.3243 6 0.027 0.69 1.992 2.965 16.4 53.8404 24 0.2047 6 0.022 0.56 1.249 1.859 26.1 85.6B902 1325. Requirements for Wires5.1 The purchaser shall designate the type of wire and the kind of coating, if any, to be used in the conductor.5.2 Before stranding, the co
27、pper wire used shall meet all of the requirements of the following specifications of ASTM that areapplicable to its type:5.2.1 Specification B3,5.2.2 Specification B33,5.2.3 Specification B2,5.2.4 Specification B1,5.2.5 Specification B189, and5.2.6 Specification B246.5.3 In SIW compressed conductors
28、, the central core shall be made of wire of the same type and temper as the concentric layers,unless otherwise specified.6. Joints6.1 Welds and brazes may be made in rods or in wires prior to final drawing. Welds and brazes may be made in the finishedindividual wires composing the conductor, but sha
29、ll not be closer together than prescribed in Table 2.7. Lay7.1 For stranded conductors, the lay length of a layer of wires shall be not less than 8 nor more than 16 times the outer diameterof the finished conductor. For conductors of 37 wires or more, this requirement shall apply to the wires in the
30、 outer two layers only.7.2 For stranded conductors, the direction of lay of the outer layer shall be left hand and may be reversed or unidirectional/unilay in successive layers, unless otherwise specified by the purchaser.7.3 Other lays for special purposes shall be furnished by special agreement be
31、tween the manufacturer and the purchaser(Explanatory Note 35).8. Construction8.1 The areas of cross section, minimum number of wires, and diameters of strands for SIW compressed stranded conductorsshall conform to the requirements prescribed in Table 1 (Explanatory Note 2).9. Physical and Electrical
32、 Tests of Conductors Stranded of Soft Wires9.1 Tests for the electrical properties of wires composing conductors made from soft or annealed copper wire, bare or coated,shall be made before stranding.9.2 Tests for the physical properties of soft or annealed copper wire, bare or coated, may be made up
33、on the wires beforestranding or upon wires removed from the complete stranded conductor, but need not be made upon both. Care shall be taken toavoid mechanical injury to wire removed from the conductor for the purpose of testing.9.3 The physical properties of wire when tested before stranding shall
34、conform to the applicable requirements of 5.2.9.4 The physical properties of wires removed from the completed stranded conductor shall be permitted to vary from theapplicable requirements of 5.2 by the following amounts (Explanatory Note 54):9.4.1 Average of Results Obtained on All Wires TestedThe m
35、inimum elongation required shall be reduced in numerical value5 (for example, from 30 to 25 %) from the numerical requirements for the wire before stranding.9.4.2 Results Obtained on Individual WiresThe elongation of individual wires shall be reduced in numerical value 15 fromthe minimum requirement
36、s before stranding (that is, 10 in addition to the 5 allowed in 9.4.1), but in no case shall the elongationof any individual wire be less than 5 %.TABLE 2 Minimum Distance Between Joints in CompletedConductorNumber ofWires inConductorHard orMedium-HardTemperSoft Temper3 to 19 50 ft 1 ft20 to 36 50 f
37、t 1 ft in a layerA37 to 60 25 ft 1 ft in a layerA61 and over 5 ft 1 ft in a layerAA Except as indicated, the limitations apply to closeness of joints throughout thecompleted conductor.B902 1339.5 In the event that the requirements prescribed in 9.4.2 are met but those prescribed in 9.4.1 are not met
38、, a retest shall bepermitted wherein all wires of the conductor shall be tested for the purpose of final determination of conformance to 9.4.9.6 Elongation tests to determine compliance shall not be made on the conductor as a unit.9.7 If a tinning, lead-coating, or lead-alloy-coating test is require
39、d, it shall be made on the wires prior to stranding.10. Physical and Electrical Tests of Conductors Stranded of Hard-Drawn or Medium-Hard-Drawn Wires10.1 Tests for the physical and electrical properties of wires composing conductors made from hard-drawn or medium-hard-drawn wires, uncoated or coated
40、, shall be made before but not after stranding.10.2 At the option of the purchaser, tension and elongation tests on hard-drawn and medium-hard-drawn wires, uncoated orcoated, before stranding may be waived, and the completed hard-drawn and medium-hard-drawn conductors may be tested as aunit. The bre
41、aking strength of the bare conductors so tested shall be at least 90 % of the total of the specified minimum breakingstrengths of the component wires. The maximum breaking strength of conductors made from medium-hard-drawn wires, uncoatedor coated, shall be not greater than the sum of the specified
42、maximum breaking strengths of the component wires. The minimumbreaking strength of wires shall be calculated using specified nominal diameters and specified minimum tensile strengths. Themaximum breaking strengths of wires shall be calculated using nominal diameters and specified maximum tensile str
43、engths. Thefree length between grips of the test specimen shall be not less than 24 in. (600 mm), and care shall be taken to ensure that thewires in the conductor are evenly gripped during the test (Explanatory Note 4).10.3 When requested by the purchaser at the time of placing the order, tension te
44、sts on hard-drawn and medium-hard-drawnwires, uncoated or coated, before stranding or as a unit may be waived and tests made on wires removed from the completedconductor. The test limits, based on a 10-in. (250-mm) gage length, for such tests shall be specified by the purchaser in the placingof indi
45、vidual orders (Explanatory Note 54).10.4 If a tinning test is required, it shall be made on the wires prior to stranding.11. Density11.1 For the purpose of calculating mass, cross sections, and so forth, the density of the copper shall be taken as 8.89 g/cm3(0.32117 lb/in.3) at 20C (Explanatory Note
46、 65).12. Mass and Resistance12.1 The mass and electrical resistance of a unit length of stranded unsealed conductor are a function of the length of lay. Theapproximate weight and electrical resistance may be determined using the standard increments shown in Table 3. When greateraccuracy is desired,
47、the increment based on the specific lay of the conductor may be calculated (Explanatory Note 7).12.2 The maximum electrical resistance of a unit length of bare stranded conductor shall not exceed 102 % of the nominal dcresistance shown in Table 1 (Explanatory Note 7Note 8). ). When dc resistance is
48、measured at other than 20C, it is to be correctedby using the multiplying factor given in Table 4.12.3 For conductors to be used in covered or insulated wires or cables, dc resistance measurement may be used in lieu of themethod outlined in Section 13 to determine compliance with this specification.
49、13. Variation in Area13.1 The area of cross section of the completed conductor shall be not less than 98 % of the area indicated in Column 1 of Table1. Unless otherwise specified by the purchaser, the manufacturer may have the option of determining the cross-sectional area byeither of the following methods, except that in case of a question regarding area compliance, the method of 13.1.2 shall be used.13.1.1 The area of cross section of a conductor may be determined by calculations from diameter measurements, expressed tofour decimal places, of its component wires at
