ASTM B784-2001(2012) Standard Specification for Modified Concentric-Lay-Stranded Copper Conductors for Use in Insulated Electrical Cables《绝缘电缆用改进的同芯绞捻铜导线标准规格》.pdf
《ASTM B784-2001(2012) Standard Specification for Modified Concentric-Lay-Stranded Copper Conductors for Use in Insulated Electrical Cables《绝缘电缆用改进的同芯绞捻铜导线标准规格》.pdf》由会员分享,可在线阅读,更多相关《ASTM B784-2001(2012) Standard Specification for Modified Concentric-Lay-Stranded Copper Conductors for Use in Insulated Electrical Cables《绝缘电缆用改进的同芯绞捻铜导线标准规格》.pdf(5页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: B784 01 (Reapproved 2012)Standard Specification forModified Concentric-Lay-Stranded Copper Conductors forUse in Insulated Electrical Cables1This standard is issued under the fixed designation B784; the number immediately following the designation indicates the year oforiginal adoption o
2、r, 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 bare modified concentric-lay-stranded conductors mad
3、e from round copper wires, eitheruncoated or coated with tin, lead, or lead alloy for general usein insulated electrical cables. These conductors shall be con-structed with a central core consisting of not more than sevenwires, surrounded by one or more layers of helically laid wires.1.2 For the pur
4、poses of this specification, conductors areclassified as follows (Explanatory Note 1 and Note 2):1.2.1 Class B ModifiedConductors to be insulated withvarious materials such as rubber, paper, and crosslink polyeth-ylene.1.2.2 Class C Modified and Class D ModifiedConductorswhere greater flexibility is
5、 required than is provided by ClassB Modified conductors.1.3 The values stated in inch-pound or SI units are to beregarded separately as standard. Each system shall be usedindependently of the other. Combining the values from the twosystems may result in non- conformance with the specification.For c
6、onductor sizes designated by AWG or kcmil sizes, therequirements in SI units are numerically converted from thecorresponding requirements in inch-pound units. For conductorsizes designated byAWG or kcmil, the requirements in SI unitshave been numerically converted from corresponding valuesstated or
7、derived in inch-pound units. for conductor sizesdesignated by SI units only, the requirements are stated orderived in SI units.1.3.1 For density, resitivity and temperature, the valuesstated in SI units are to be regarded as standard.NOTE 1The significant differences in this specification from Speci
8、fi-cation B8 are as follows: (1) The central core is permitted to contain up toseven wires drawn into the assembly with an infinite length of lay whileSpecification B8 permits only one, and (2) The construction is applicableonly to stranded assemblies of 19 or more wires.2. Referenced Documents2.1 T
9、he following documents of the issue in effect at thedate of material purchase form a part of this specification to theextent referenced herein.2.2 ASTM Standards:2B3 Specification for Soft or Annealed Copper WireB8 Specification for Concentric-Lay-Stranded Copper Con-ductors, Hard, Medium-Hard, or S
10、oftB33 Specification for Tin-Coated Soft or Annealed CopperWire for Electrical PurposesB189 Specification for Lead-Coated and Lead-Alloy-Coated Soft Copper Wire for Electrical PurposesB263 Test Method for Determination of Cross-SectionalArea of Stranded ConductorsB354 Terminology Relating to Uninsul
11、ated Metallic Elec-trical Conductors2.3 Other Standard:NBS Handbook 10033. Ordering Information3.1 Orders for material under this specification shall includethe following information:3.1.1 Quantity of each size and class,3.1.2 Conductor size: circular-mil area or American WireGage (AWG) (Section 6),
12、3.1.3 Class (see 1.2 and Table 1),3.1.4 Temper (see 10.2),3.1.5 Whether coated or uncoated; if coated, designate typeof coating (see 10.1 and 10.2),3.1.6 Details of special-purpose lays, if required (see 5.2),1This specification is under the jurisdiction of ASTM Committee B01 onElectrical Conductors
13、 and is the direct responsibility of Subcommittee B01.04 onConductors of Copper and Copper Alloys.Current edition approved April 1, 2012. Published August 2012. Originallyapproved in 1988. Last previous edition approved in 2006 as B784 01 (2006).DOI: 10.1520/B0784-01R12.2For referenced ASTM standard
14、s, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from National Technical Information Service (NTIS), 5285 PortRoyal Rd., Springf
15、ield, VA 22161, http:/www.ntis.gov.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3.1.7 Lagging, if required (see 14.2),3.1.8 Special package marking, if required (Section 13),3.1.9 Place of inspection (Section 12), and4. Joints4.1
16、Welds and brazes may be made in rods or in wires priorto final drawing. Welds and brazes may be made in the finishedindividual wires composing the conductor, but shall not becloser together than prescribed in Table 2.5. Lay5.1 The lay of a layer of wires shall be not less than eightnor more than six
17、teen times the outside diameter of that layer,except that for conductors composed of 37 wires or more, thisrequirement shall apply only to the two outer layers. The lay ofthe layers other than the two outer layers shall be at the optionof the manufacturer, unless otherwise agreed upon.5.2 Other lays
18、 for special purposes shall be furnished byspecial agreement between the manufacturer and the purchaser(Explanatory Note 3).5.3 The direction of lay of the outer layer shall be left-handunless the direction of lay is specified otherwise by thepurchaser.5.4 The direction of lay shall be reversed in s
19、uccessivelayers, unless otherwise specified by the purchaser.6. Construction6.1 The areas of cross section, numbers, and diameters ofwires in the various classes of concentric-lay-stranded conduc-tors shall conform to the requirements prescribed in Table 1.6.2 The diameters of the wires listed in Ta
20、ble 1 are nominal.Where “combination strand is required in order to insulate theconductor properly (strands in the outer layer having a largerdiameter than those in the inner layers) the diameters shall besubject to a tolerance of 6 5 %, provided that the area of crosssection after stranding is in a
21、ccordance with Section 11.TABLE 1 Construction Requirements of Modified Concentric-Lay-Stranded Copper ConductorsNOTE 1See Explanatory Note 5.Circular MilsSizeAmericanWire GageClass B Modified Class C Modified Class D ModifiedNumber ofWiresDiameterNumber ofWiresDiameterNumber ofWiresDiameter(mils) (
22、mm) (mils) (mm) (mils) (mm)5 000 000A217 151.8 3.86 271 135.8 3.45 271 135.8 3.454 000 000 217 144.0 3.66 271 128.9 3.27 271 128.9 3.274 000 000 217 135.8 3.45 271 121.5 3.09 271 121.5 3.093 500 000 169 143.9 3.66 217 127.0 3.23 271 113.6 2.893 000 000A169 133.2 3.38 217 117.6 2.99 271 105.2 2.672 5
23、00 000A127 140.3 3.56 169 121.6 3.09 217 107.3 2.732 000 000A127 125.5 3.19 169 108.8 2.76 217 96.0 2.441 900 000 127 122.3 3.11 169 106.0 2.69 217 93.6 2.381 800 000 127 119.1 3.03 169 103.2 2.62 217 91.1 2.311 750 000A127 117.4 2.98 169 101.8 2.59 217 89.8 2.281 700 000 127 115.7 2.94 169 100.3 2.
24、55 217 88.5 2.251 600 000 127 112.2 2.85 169 97.3 2.47 217 85.9 2.181 500 000A91 128.4 3.26 127 108.7 2.76 169 94.2 2.391 400 000 91 124.0 3.15 127 105.0 2.67 169 91.0 2.311 300 000 91 119.5 3.04 127 101.2 2.57 169 87.7 2.231 250 000 91 117.2 2.98 127 99.2 2.52 169 86.0 2.181 200 000 91 114.8 2.92 1
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