ASTM B786-2002a Standard Specification for 19 Wire Combination Unilay-Stranded Aluminum Conductors for Subsequent Insulation《次级绝缘用19股单绞捻1350型铝导线标准规范》.pdf
《ASTM B786-2002a Standard Specification for 19 Wire Combination Unilay-Stranded Aluminum Conductors for Subsequent Insulation《次级绝缘用19股单绞捻1350型铝导线标准规范》.pdf》由会员分享,可在线阅读,更多相关《ASTM B786-2002a Standard Specification for 19 Wire Combination Unilay-Stranded Aluminum Conductors for Subsequent Insulation《次级绝缘用19股单绞捻1350型铝导线标准规范》.pdf(6页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: B 786 02aStandard Specification for19 Wire Combination Unilay-Stranded AluminumConductors for Subsequent Insulation1This standard is issued under the fixed designation B 786; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revis
2、ion, 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 combination unilay-stranded conductors made from round wires of alumi
3、num 1350and 8000 series of aluminum alloys, for insulated conductorsfor electrical purposes. Aluminum 1350 wires in tempers -H19(extra hard), -H16 or -H26 (34 hard), -H14 or -H24 (12 hard),and -H142 or -H242 (12 hard) and 8000 series aluminum alloyswires in tempers “0” and H1X or H2X are permitted.
4、Theseconductors shall be constructed with a central core wiresurrounded by two layers of helically laid wires, resulting in anouter diameter equal to the compressed-stranded equivalentconductors.NOTE 1For the purpose of this specification, combination unilayconductor is defined as follows: a central
5、 core wire surrounded by a layerof six helically laid wires of the same diameter as the core wire with ahelically laid outer layer containing six smaller wires alternated betweensix wires of the same diameter as the wires in the layer underneath. Bothlayers have a common length and direction of lay
6、(see Fig. 1).1.1.1 For the purpose of this specification, normal conductorclassification (Class AA, A, B, C) is not applicable, as theseconductors are intended for subsequent insulation. The descrip-tive term combination unilay-stranded shall be used in place ofconductor classification (Note 2 and N
7、ote 3).NOTE 2Prior to 1975, aluminum 1350 was designated as EC alumi-num.NOTE 3The aluminum and temper designations conform to ANSIStandard H35.1. Aluminum 1350 corresponds to Unified NumberingSystem A91350 in accordance with Practice E 527. Unified NumberingSystem alloy designations for 8000 Series
8、 aluminum alloys in accordancewith Practice E 527 are listed in Table number 1 of Specification B 800.1.2 The values stated in inch-pound or SI units are to beregarded separately as standard. The values in each system arenot exact equivalents; therefore, each system shall be usedindependently of the
9、 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 units are to be regarded as standard.2. Referenced Documents2.1 The following documents of the issue in effect on dateof material pu
10、rchase form a part of this specification to theextent referenced herein.2.2 ASTM Standards:B 193 Test Method for Resistivity of Electrical ConductorMaterials2B 230 Specification for Aluminum 1350-H19 Wire for Elec-trical Purposes2B 263 Test Method for Determination of Cross-SectionalArea of Stranded
11、 Conductors2B 609 Specification for Aluminum 1350 Round Wire, An-nealed and Intermediate Tempers, for Electrical Purposes2B 800 Specification for 8000 Series Aluminum Alloy Wirefor Electrical PurposesAnnealed and Intermediate Tem-pers2B 801 Specification for Concentric-Lay-Stranded Conduc-tors of 80
12、00 Series Aluminum Alloy for SubsequentCovering or Insulation2E 29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications3E 527 Practice for Numbering Metals and Alloys (UNS)42.3 ANSI Standard:ANSI H35.1 Alloy and Temper Designation Systems forAluminum52.4 NIS
13、T Standard:NBS Handbook 10063. Ordering Information3.1 Orders for materials under this specification shall in-clude the following information:3.1.1 Conductor alloy,3.1.2 Quantity of each size,3.1.3 Conductor size: Circular-mil area or American WireGage, AWG (Section 6 and Table 1),3.1.4 Stranding (s
14、ee Explanatory Note 1),1This specification is under the jurisdiction of ASTM Committee B01 onElectrical Conductors and is the direct responsibility of Subcommittee B01.07 onConductors of Light Metals.Current edition approved Oct. 10, 2002. Published Decemeber 2002. Originallyapproved in 1988. Last p
15、revious edition approved in 2002 as B 786 02.2Annual Book of ASTM Standards, Vol 02.03.3Annual Book of ASTM Standards, Vol 14.02.4Annual Book of ASTM Standards, Vol 01.01.5Available from American National Standards Institute, 25 W. 43rd St., 4thFloor, New York, NY 10036.6Available from the National
16、Institute of Standards and Technology, (NIST), 100Bureau Drive, Stop 3460, Gaithersburg, MD 20899-3460.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3.1.5 Temper (see Section 11),3.1.6 Details of special-purpose lays, if required (
17、see 5.2),3.1.7 When physical tests shall be made (see Sections 7 and8),3.1.8 Package size (see 16.1),3.1.9 Heavy wood lagging, if required (see 17.2),3.1.10 Special package marking, if required (Section 17),and3.1.11 Place of inspection (Section 15).4. Joints4.1 Electric-butt welds, cold pressure we
18、lds, or electric-buttcold-upset welds may be made in the finished individual wirescomposing the conductor but shall not be closer together than1 ft (Explanatory Note 2).5. Lay5.1 For combination unilay conductors the lay of a layer ofwires shall be not less than 8 nor more than 16 times theoutside d
19、iameter of the outer layer.5.2 Other lays for special purposes shall be furnished byspecial agreement between the manufacturer and the purchaser.NOTE 4Certain types of insulation conductors may require shorter laythan other conductors. It is expected that special requirements regardinglength of lay
20、will be specified by the purchaser in such instances.5.3 The direction of lay shall be left-hand unless thedirection of lay is specified otherwise by the purchaser.6. Construction (Explanatory Note 1)6.1 The areas of cross section, numbers, and diameters ofwires in the various conductors shall confo
21、rm to the require-ments prescribed in Table 1 (Note 3) (see Fig. 1).6.2 The diameters of the wires listed in Table 2 are nominal.In order to produce an essentially round 19-wire construction,the outer 12-wire layer in the combination unilay product iscomprised of 6 wires of the same diameter as the
22、wires in the7-wire core, and 6 wires approximately 25 % smaller. The2-wire sizes are alternated around the 7-wire core.7. Mechanical and Electrical Tests of Conductors notAnnealed after Stranding7.1 Wires composing the conductors shall be tested prior tostranding in accordance with the applicable sp
23、ecification (see11.1.2), and tests on the completed conductor are not required.However, when requested by the purchaser and agreed to bythe manufacturer at time of ordering, the tension tests of wiresbefore stranding may be waived and the completed conductortested in accordance with 7.2, or wires re
24、moved from thecompleted conductor tested in accordance with 7.5.7.2 When the completed conductor is tested as a unit, thebreaking strength shall be not less than the rated strength of1350-H19 conductors or the minimum rated strength of 1350-H16, -H26, -H14, -H24, -H142, and -H242 conductors iffailur
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