1、Designation: B226 11Standard Specification forCored, Annular, Concentric-Lay-Stranded CopperConductors1This standard is issued under the fixed designation B226; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revis
2、ion. 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 cored, annular, concentric-lay-stranded conductors made from round soft copper wires, eitheruncoated o
3、r coated with tin for use as electrical conductors(Explanatory Note 1 and Note 2).1.2 The constructions prescribed herein are suitable for bareconductors, or for conductors to be covered with weather-resistant (weather-proof) material, or for conductors to beinsulated with rubber, varnished cloth, o
4、r impregnated paper,except types such as “oil-filled” or “gas-filled” (ExplanatoryNote 3).1.3 Cored, annular conductor constructions not included inthis specification shall be specifically agreed upon between themanufacturer and the purchaser when placing the order.1.4 These constructions are not re
5、commended for use aselectric furnace leads where great flexibility is required andspecial conductor designs are indicated in consideration of theparticular service requirements.1.5 The SI values for density are regarded as the standard.For all other properties the inch-pound values are to beregarded
6、 as standard and the SI units may be approximate.2. Referenced Documents2.1 The following documents in effect at the time ofreference form a part of these methods to the extent referencedherein:2.2 ASTM Standards:2B3 Specification for Soft or Annealed Copper WireB8 Specification for Concentric-Lay-S
7、tranded Copper Con-ductors, Hard, Medium-Hard, or SoftB33 Specification for Tin-Coated Soft or Annealed CopperWire for Electrical PurposesB172 Specification for Rope-Lay-Stranded Copper Con-ductors Having Bunch-Stranded Members, for ElectricalConductorsB173 Specification for Rope-Lay-Stranded Copper
8、 Con-ductors Having Concentric-Stranded Members, for Elec-trical ConductorsB174 Specification for Bunch-Stranded Copper Conductorsfor Electrical ConductorsB263 Test Method for Determination of Cross-SectionalArea of Stranded ConductorsB354 Terminology Relating to Uninsulated Metallic Elec-trical Con
9、ductorsB496 Specification for Compact Round Concentric-Lay-Stranded Copper ConductorsB784 Specification for Modified Concentric-Lay-StrandedCopper Conductors for Use in Insulated Electrical CablesB787/B787M Specification for 19 Wire CombinationUnilay-Stranded Copper Conductors for Subsequent Insu-la
10、tionB835 Specification for Compact Round Stranded CopperConductors Using Single Input Wire ConstructionB902 Specification for Compressed Round Stranded Cop-per Conductors, Hard, Medium-Hard, or Soft Using SingleInput Wire Construction2.3 American National Standard:IEEE Standard 100 The Authoritative
11、 Dictionary of IEEEStandards Terms32.4 NIST:NBS Handbook 100Copper Wire Tables43. Ordering Information3.1 Orders for material under this specification shall includethe following information:3.1.1 Quantity of each size,3.1.2 Conductor size: circular-mil area (Section 7 and Table1),3.1.3 Whether coate
12、d or uncoated; if coated, a tin coatingonly (Section 11),3.1.4 Specific kind and treatment of core material (Section4),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
13、 Alloys.Current edition approved April 1, 2011. Published May 2011. Originallyapproved in 1948. Last previous edition approved in 2004 as B226 04. DOI:10.1520/B0226-11.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual
14、 Book of ASTMStandards volume information, refer to the standards 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.4Available from National Technical Information Service (NTIS), 530
15、1 ShawneeRd., Alexandria, VA 22312, http:/www.ntis.gov.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3.1.5 Details of special-purpose lays, if required (see 6.1and 6.2 and Explanatory Note 3),3.1.6 Package size (Section 14),3.1.7 L
16、agging, if required (see 14.2),3.1.8 Special package marking, if required (Section 14.3),and3.1.9 Place of inspection (Section 13).4. Core4.1 The core may be of any material or materials suitable forthe purpose as agreed upon by the manufacturer and thepurchaser when placing the order.4.2 The size o
17、f the core and its surface firmness as a base forthe overlaid wires shall be adequate to prevent the forcing ordropping of any wire out of its layer position (ExplanatoryNote 4).4.3 If a specific kind of fibrous core is required by thepurchaser (such as manila rope, sisal, and so forth) it shall bes
18、pecified by him when placing the order (Explanatory Note 4).4.4 The proper treatment of the fibrous core, if any treat-ment be required, shall be left to the discretion of themanufacturer unless other arrangements are made at the time ofpurchase.4.5 If a metal supporting type of core is required, sp
19、ecialarrangements will be necessary between the manufacturer andthe purchaser.5. Joints5.1 No splice shall be made in the conductor as a whole.Welds or brazes may be made in the finished individual wires.Not more than one of the wires in any given layer shall bespliced in any 1-ft length of that lay
20、er.5.2 All joints shall be made in a workmanlike manner andshall be approximately the diameter of the unjointed wire.6. Lay6.1 The length of lay of the respective layers of wires shallbe at the option of the manufacturer unless otherwise agreedupon with the purchaser (Explanatory Note 3).6.2 The dir
21、ection of lay of the outer layer of wires shall beleft hand, unless specified otherwise by the purchaser (Ex-planatory Note 3).6.3 The direction of lay shall be reversed in successivelayers (Explanatory Note 3).7. Construction7.1 The nominal conductor size, number of layers of wires,number, diameter
22、, lay-up of wires, approximate core diameter,and maximum conductor diameter shall conform to the require-ments prescribed in Table 1 (Explanatory Note 4).8. Physical and Electrical Tests8.1 Tests for the electrical properties of wires composingconductors made from soft or annealed copper wire, bare
23、orcoated, shall be made before stranding.8.2 Tests for the physical properties of soft or annealedcopper wire, bare or coated, may be made upon the wiresbefore stranding or upon wires removed from the completedstranded conductor, but need not be made upon both. Care shallbe taken to avoid mechanical
24、 injury to wire removed from theconductor for the purpose of testing.8.3 The physical properties of wire when tested beforestranding shall conform to the applicable requirements of 11.2.TABLE 1 Construction of Cored, Annular, Concentric-Lay-Stranded Copper ConductorsNominal Area ofCopperCrossSection
25、, cmilsApproximateDiameter ofCore, in.Diameter ofWires, in.Number of Strands in LayersCalculated Area ofCopper, CrossSection, cmilsMaximumOutside Diameter,Ain.1st 2nd 3rd Total5 000 000 2.875 0.1620 57 63 69 189 4 960 116 3.8974 500 000 2.500 0.1620 50 56 62 168 4 408 992 3.5174 000 000 2.250 0.1620
26、 45 51 57 153 4 015 332 3.2623 500 000 2.000 0.1620 40 45 52 137 3 595 428 3.0073 000 000 1.625 0.1620 33 38 45 116 3 044 304 2.6272 500 000 1.500 0.1440 34 40 46 120 2 488 320 2.3942 000 000 1.313 0.1284 34 40 46 120 1 978 387 2.1141 750 000 1.125 0.1280 30 35 42 107 1 753 088 1.9231 500 000 1.000
27、0.1255 26 32 38 96 1 512 024 1.7831 250 000 0.750 0.1255 21 26 33 80 1 260 020 1.5331 000 000 0.563 0.1255 16 21 28 65 1 023 766 1.346900 000 0.500 0.1172 16 22 28 66 906 565 1.234800 000 0.468 0.1110 16 21 28 65 800 865 1.164750 000 0.375 0.1172 12 18 24 54 741 735 1.108AThe following plus toleranc
28、es are included in the calculation of maximum outside diameters:Nominal Area,cmilsPlus Tolerance Included,mils5 000 000 to 4 500 001 504 500 000 to 4 000 001 454 000 000 to 3 500 001 403 500 000 to 3 000 001 353 000 000 to 750 000 30B226 1128.4 The physical properties of wires removed from thecomple
29、ted stranded conductor shall be permitted to vary fromthe applicable requirements of 11.2 by the following amounts(Explanatory Note 5):8.4.1 Average of Results Obtained on All Wires TestedTheminimum elongation required shall be reduced in numericalvalue 5 (for example, from 30 to 25 %) from the nume
30、ricalrequirements for the wire before stranding.8.4.2 Results Obtained on Individual WiresThe elonga-tion of individual wires shall be reduced in numerical value 15from the minimum requirements before stranding (that is, 10 inaddition to the 5 allowed in 8.4.1) but in no case shall theelongation of
31、any individual wire be less than 5 %.8.5 In the event that the requirements prescribed in 8.4.2 aremet but those prescribed in 8.4.1 are not met, a retest shall bepermitted wherein all wires of the conductor shall be tested forthe purpose of final determination of conformance to 8.4.8.6 Elongation t
32、ests to determine compliance shall not bemade on the conductor as a unit.8.7 If a tin coating test is required, it shall be made on wiresprior to stranding.9. Density9.1 For the purpose of calculating mass, cross-sections, andso forth, the density of copper shall be taken as 0.32117lb/in.3(8.89 g/cm
33、3) at 20C (Explanatory Note 6).10. Mass10.1 The mass per unit length and electrical resistance of aunit length of stranded conductor are a function of the length oflay. The approximate mass per unit length and electricalresistance may be determined using the standard incrementsshown in Table 2. When
34、 greater accuracy is desired, theincrement based on the specific lay of the conductor may becalculated (Explanatory Note 7).10.2 The approximate mass per unit length of completedconductors are given in Table 3 for information only, andinclude mass per unit lengths of core calculated on the basis of4
35、37 lb/in.21000 ft, using approximate core areas.11. Requirements for Wires11.1 The purchaser shall designate if the type of wire is tincoated, or not (see section 11.2).11.2 Before stranding, the copper wire used shall meet all ofthe requirements of the following specifications that areapplicable to
36、 its type: Specifications B3 and B33.12. Variation in Area12.1 The area of the copper cross-section of the completedconductor shall be not less than 98 % of the calculated areagiven in Table 1. The area of cross section of a conductor shallbe considered to be the sum of the cross-sectional areas of
37、itscomponent wires at any section when measured perpendicu-larly to their individual axes. Alternatively, the cross-section ofa conductor may be calculated by the weight method asspecified in Test Method B263. In case of dispute, Test MethodB263 shall be the referee.13. Inspection13.1 All tests and
38、inspection shall be made at the place ofmanufacture, unless otherwise especially agreed upon betweenthe manufacturer and the purchaser at the time of purchase. Themanufacturer shall afford the inspector representing the pur-chaser all reasonable facilities, to satisfy him that the materialis being f
39、urnished in accordance with this specification.14. Packaging and Package Marking14.1 Package sizes for conductors shall be agreed uponbetween the manufacturer and the purchaser in the placing ofindividual orders.14.2 The conductors shall be protected against damage inordinary handling and shipping.
40、If heavy wood lagging isrequired, it shall be specified by the purchaser at the time ofplacing the order.14.3 The net mass, length (or lengths, if more than onelength is included in the package), size, kind of conductor,purchase order number, reel number, and any other markingsrequired by the purcha
41、se order shall be marked on a tagattached to the end of the conductor inside the package. Thesame information, together with the manufacturers serialnumber (if any) and all shipping marks required by thepurchaser, shall appear on the outside of each package.15. Keywords15.1 annular; concentric-lay-s
42、tranded; concentric-laystranded copper conductor; copper electrical conductor; cored;electrical conductor; electrical conductorcopper; strandedcopper conductorTABLE 2 Standard Increments Due to StrandingNominal Area of Copper CrossSection, cmilsIncrement (Increase)in Mass per Unit Length ofCopper Cr
43、oss Section, %5 000 000 to 4 000 001 54 000 000 to 3 000 001 43 000 000 to 750 000 3TABLE 3 Approximate Areas and Linear Densities of Cored,Annular, Concentric Lay-Stranded Copper ConductorsNominal Size,cmilsCalculatedArea of CopperCross Section,in.2Calculated Mass per Unit Length, lb/1000 ftCopper
44、CoreATotal5 000 000 3.896 15 760 2926 18 6904 500 000 3.463 14 010 2213 16 2204 000 000 3.154 12 640 1792 14 4303 500 000 2.823 11 320 1416 12 7403 000 000 2.391 9 492 935 10 4302 500 000 1.954 7 758 797 8 5552 000 000 1.554 6 168 610 6 7781 750 000 1.377 5 466 448 5 9145 0681 500 000 1.188 4 714 35
45、4 4 1271 250 000 0.9896 3 928 199 3 3041 000 000 0.8041 3 192 11279 2 905900 000 0.7120 2 826 78 2 575800 000 0.6290 2 497 50 2 362750 000 0.5826 2 312AImpregnated manila rope core assumed (see 4.3). For dry core 20 percentshould be deducted from these tabular values of weights of cores, with corre-
46、sponding changes in total weights (Explanatory Note 4).B226 113EXPLANATORY NOTESNOTE 1In this specification cored, annular, concentric-lay-strandedconductor constructions only are specifically designated. Requirementsfor non-cored constructions will be found in the following specifications:Specifica
47、tions B8, B172, B173, B174, B496, B784, B787/B787M, B835,and B902.NOTE 2For definitions of terms relating to conductors, referenceshould be made to IEEE Standard 100 and Terminology B354.NOTE 3If service applications for conductors of this type are unusualas to flexibility requirements, variation in
48、 the construction may bedesirable. Details concerning such should be arranged between themanufacturer and the purchaser at the time of placing the order.NOTE 4Fiber cores are available in commercial sizes. It has beenfound impracticable to prescribe fiber cores made to special diameters. Itis permis
49、sible for the manufacturer to use a fiber core which is slightlyoversize or to build up a slightly undersized core with servings of suitablematerial to bring it up to the diameter required for compliance with 4.2.NOTE 5Wires unlaid from conductors manifestly will have differentphysical properties from those of the wires when prepared for cabling, onaccount of the deformation brought about by laying and again straighten-ing for test.NOTE 6The value of density of copper is in accordance with theInternational Annealed Copper Standard. The corresponding value at 0Cis 8
