1、Designation:B22904 Designation: B229 12Standard Specification forConcentric-Lay-Stranded Copper and Copper-Clad SteelComposite Conductors1This standard is issued under the fixed designation B229; the number immediately following the designation indicates the year oforiginal adoption or, in the case
2、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 concentric-lay-stranded conductors made from uncoated hard-drawn ro
3、und copper wires incombination with hard-drawn round copper-clad steel wires for general use as overhead electrical conductors.1.2 For the purpose of this specification, conductors are classified under the following type designations (see Fig. 1):Type A Type GType C Type JType D Type KType E Type NT
4、ype EK Type PType F Type V1.3 The SI values for density are regarded as the standard. For all other properties the inch-pound values are to be regarded asstandard and the SI units may be approximate.2. Referenced Documents2.1 ASTM Standards:2B1 Specification for Hard-Drawn Copper WireB227 Specificat
5、ion for Hard-Drawn Copper-Clad Steel WireB354 Terminology Relating to Uninsulated Metallic Electrical Conductors Terminology Relating to Uninsulated MetallicElectrical ConductorsE29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications2.2 ANSI Standard:C 42
6、Definitions of Electrical Terms32.3 National Institute of Standards and Technology:NBS Handbook 100Copper Wire Tables43. Ordering Information3.1 Orders for material under this specification shall include the following information:3.1.1 Quantity of each size and type;3.1.2 Conductor size: hard-drawn
7、copper equivalent in circular-mil area or AWG (Section 7 and Table 1);3.1.3 Type (see 1.2, Fig. 1, and Table 1);3.1.4 Direction of lay of outer layer, if other than left-hand (see 6.3);3.1.5 When physical tests shall be made (see section 7.2);3.1.6 Package size (see 14.1);3.1.7 Special package marki
8、ng, if required (Section 15);3.1.8 Lagging, if required (see 14.2); and3.1.9 Place of inspection (Section 13).1This specification is under the jurisdiction of ASTM Committee B01 on Electrical Conductors and is the direct responsibility of Subcommittee B01.06 on CompositeConductors.Current edition ap
9、proved April 1, 2004.2012. Published April 2004.May 2012. Originally approved in 1948. Last previous edition approved in 20022004 as B229 024.DOI: 10.1520/B0229-04.10.1520/B0229-12.2For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at serviceastm.o
10、rg. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036.4Available from National Institute of Standards and Technology (NIST),
11、 100 Bureau Dr., Stop 3460, Gaithersburg, MD 20899-3460.1This 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 to adequately depict all changes
12、 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 Conshohocken, PA 19428-2959, Unite
13、d States.TABLE 1 Construction Requirements and Breaking Strength of Concentric-Lay-Stranded Copper and Copper-Clad Steel CompositeConductorsNOTE 1Metric EquivalentsFor conductor size, 1 cmil = 0.0005067 mm2(round to four significant figures); for diameter 1 mil = 0.02540 mm(round to four significant
14、 figures); for breaking strength, 1 lb = 0.45359 kg (round to four significant figures).Conductor Size, Hard-Drawn CopperEquivalentATypeGrade 30 EHS Copper-Clad Steel WiresHard-Drawn CopperWiresRated BreakingStrength, min,lb lbBcmil AWGNumber ofWiresDiameter ofWires, milsNumber ofWiresDiameter ofWir
15、es, mils350 000 . . . E 7 157.6 12 157.6 32 420350 000 . . . EK 4 147.0 15 147.0 23 850350 000 . . . V 3 175.1 9 189.3 23 480300 000 . . . E 7 145.9 12 145.9 27 770300 000 . . . EK 4 136.1 15 136.1 20 960300 000 . . . V 3 162.1 9 175.2 20 730250 000 . . . E 7 133.2 12 133.2 23 920250 000 . . . EK 4
16、124.2 15 124.2 17 840250 000 . . . V 3 148.0 9 160.0 17 420211 600 0000 E 7 122.5 12 122.5 20 730211 600 0000 G 2 194.4 5 194.4 15 640211 600 0000 EK 4 114.3 15 114.3 15 370211 600 0000 V 3 136.1 9 147.2 15 000211 600 0000 F 1 183.3 6 183.3 12 290167 800 000 E 7 109.1 12 109.1 16 800167 800 000 J 3
17、185.1 4 185.1 16 170167 800 000 G 2 173.1 5 173.1 12 860167 800 000 EK 4 101.8 15 101.8 12 370167 800 000 V 3 121.2 9 131.1 12 200167 800 000 F 1 163.2 6 163.2 9980133 100 00 K 4 178.0 3 178.0 17 600133 100 00 J 3 164.8 4 164.8 13 430133 100 00 G 2 154.2 5 154.2 10 510133 100 00 V 3 108.0 9 116.7 98
18、46133 100 00 F 1 145.4 6 145.4 8094FIG. 1 Standard Types of Composite ConductorsB229 122TABLE 1 ContinuedConductor Size, Hard-Drawn CopperEquivalentATypeGrade 30 EHS Copper-Clad Steel WiresHard-Drawn CopperWiresRated BreakingStrength, min,lb lbBcmil AWGNumber ofWiresDiameter ofWires, milsNumber ofWi
19、resDiameter ofWires, mils105 600 0 K 4 158.5 3 158.5 14 490105 600 0 J 3 146.7 4 146.7 10 970105 600 0 G 2 137.3 5 137.3 8563105 600 0 F 1 129.4 6 129.4 653683 690 1 N 5 154.6 2 154.6 15 41083 690 1 K 4 141.2 3 141.2 11 90083 690 1 J 3 130.7 4 130.7 900083 690 1 G 2 122.2 5 122.2 695683 690 1 F 1 11
20、5.3 6 115.3 526666 360 2 P 6 154.0 1 154.0 16 87066 360 2 N 5 137.7 2 137.7 12 68066 360 2 K 4 125.7 3 125.7 973066 360 2 J 3 116.4 4 116.4 732266 360 2 A 1 169.9 2 169.9 587666 360 2 G 2 108.9 5 108.9 562666 360 2 F 1 102.6 6 102.6 423352 620 3 P 6 137.1 1 137.1 13 91052 620 3 N 5 122.6 2 122.6 10
21、39052 620 3 K 4 112.0 3 112.0 791052 620 3 J 3 103.6 4 103.6 595552 620 3 A 1 151.3 2 151.3 481041 740 4 P 6 122.1 1 122.1 11 42041 740 4 N 5 109.2 2 109.2 846041 740 4 D 2 161.5 1 161.5 734041 740 4 A 1 134.7 2 134.7 393833 090 5 P 6 108.7 1 108.7 931133 090 5 D 2 143.8 1 143.8 603533 090 5 A 1 120
22、.0 2 120.0 319326 240 6 D 2 128.1 1 128.1 494226 240 6 A 1 106.8 2 106.8 258526 240 6 C 1 104.6B2 104.6 214326 240 6 C 1 104.6C2 104.6 214320 820 7 D 2 114.1 1 114.1 402220 820 7 A 1 126.6 2 89.5 275416 510 8 D 2 101.6 1 101.6 325616 510 8 A 1 112.7 2 79.7 223316 510 8 C 1 80.8B2 83.4 110016 510 8 C
23、 1 80.8C2 83.4 110011 750 912 D 2 80.8B1 80.8 133011 750 912 D 2 80.8C1 80.8 1330ASee Explanatory Note 7.BSee Explanatory Note 11.CGrade 40 HS (all of the other CCS wire is Grade 30 EHS).4. Material for Wires4.1 The purchaser shall designate the size and type of conductor to be furnished. The positi
24、on of the hard-drawn copper wiresand the copper-clad steel wires in the conductor cross section shall be as shown in Fig. 1.4.2 Before stranding, the wire used shall meet the requirements of Specifications B1 and B227 that are applicable to its type.5. Joints5.1 CopperWelds and brazes may be made in
25、 copper rods or in copper wires prior to final drawing. Joints may not be madein the finished copper wires composing concentric-lay-stranded composite conductors containing a total of seven wires or less. Inother conductors, welds and brazes may be made in the finished individual copper wires compos
26、ing the conductor, but shall benot closer than 50 ft (15 m) to any other joint in the same layer in the conductor.5.2 Copper-Clad SteelJoints or splices may be made in the finished individual copper-clad steel wires composingconcentric-lay-stranded conductors, provided that such joints or splices ha
27、ve a protection equivalent to that of the wire itself andthat they do not decrease the strength of the finished stranded conductor below the minimum breaking strength shown in Table 1.Such joints or splices shall be not closer than 50 ft (15 m) to any other joint in the same layer in the conductor (
28、Explanatory Note1).B229 1236. Lay6.1 For Types A, C, and D conductors, the preferred lay is approximately 16.5 times the outside diameter of the completedconductor, but shall be not less than 13 nor more than 20 times this diameter.6.2 For all other types, the preferred lay of a layer of wires is 13
29、.5 times the outside diameter of that layer, but shall be not lessthan 10 nor more than 16 times this diameter.6.3 The direction of lay of the outer layer shall be left-hand unless the direction of lay is specified otherwise by the purchaser.6.4 The direction of lay shall be reversed in successive l
30、ayers.6.5 All wires in the conductor shall lie naturally in their true positions in the completed conductor. They shall tend to remainin position when the conductor is cut at any point and shall permit restranding by hand after being forcibly unraveled at the endof the conductor.7. Construction7.1 T
31、he numbers and diameters of wires in the various types of concentric-lay-stranded composite conductors shall conform tothe requirements prescribed in Table 1 (Explanatory Note 2).8. Physical and Electrical Tests8.1 Tests for the physical and electrical properties of wires composing concentric-lay-st
32、randed composite conductors shall bemade before but not after stranding.8.2 At the option of the purchaser or his representative, tension and elongation tests on wires before stranding may be waived,and the completed conductor may be tested as a unit. The breaking strength of the conductors so teste
33、d shall be not less than therated strength values shown in Table 2. The free length between grips of the test specimen shall be not less than 24 in. (0.61 m),and care shall be taken to ensure that the wires in the conductor are evenly gripped during the test (Explanatory Note 3).9. Density9.1 For th
34、e purpose of calculating weights, cross sections, and so forth, the density of the copper shall be taken as 8.89 g/cm3at 20C (Explanatory Note 4 and Table 2).9.2 The density of both types of copper-clad-steel wire shall be taken as stated in Table 2.10. Mass and Resistance10.1 The mass and electrica
35、l resistance of a unit length of stranded conductor are a function of the length of lay. Theapproximate mass and electrical resistance may be determined using the standard increments shown in Table 3. When greateraccuracy is desired, the increment based on the specific lay of the conductor may be ca
36、lculated (Explanatory Note 6). Referenceinformation is shown in Appendix X1.11. Variation in Area11.1 The area of cross section of the completed conductor shall be not less than 98%97 % of the nominal area. The area of crosssection of a conductor shall be considered to be the sum of the cross-sectio
37、nal areas of its component wires at any point whenmeasured perpendicularly to their axes (Explanatory Note 8). ). For the purposes of determining conformance to this standard, ameasured or calculated value for cross sectional area shall be rounded to four significant figures in accordance with the r
38、oundingmethod of Practice E29.12. Finish12.1 The conductor shall be free of all imperfections not consistent with the best commercial practice.13. Inspection13.1 Unless otherwise specified in the contract or purchase order, the manufacturer shall be responsible for the performance ofall inspection a
39、nd test requirements specified.13.2 All inspections and tests shall be made at the place of manufacture unless otherwise especially agreed to between themanufacturer and the purchaser at the time of the purchase.13.3 The manufacturer shall afford the inspector representing the purchaser all reasonab
40、le manufacturers facilities necessaryto ensure that the material is being furnished in accordance with this specification.TABLE 2 Density of Copper and Copper-Clad SteelUnitsDensity at 20CCopper 30 % Copper-Clad Steel 40 % Copper-Clad SteelGrams per cubic centimetre 8.89 8.15 8.24Pounds per cubic in
41、ch 0.3212 0.2944 0.2975Pounds per circular mil-foot 0.0000030270 0.0000027750 0.0000028039B229 12414. Packaging and Shipping14.1 Package sizes for conductors shall be agreed upon by the manufacturer and the purchaser in the placing of individual orders(Explanatory Note 9).14.2 The conductors shall b
42、e protected against damage in ordinary handling and shipping. If heavy wood lagging is required,it shall be specified by the purchaser at the time of purchase.15. Marking15.1 The net mass, length (or lengths, and number of lengths, if more than one length is included in the package), size, typeof co
43、nductor, purchase order number, and any other marks required by the purchase order shall be marked on a tag attached to theend of the conductor inside of the package. The same information, together with the manufacturers serial number (if any) and allshipping marks required by the purchaser, shall a
44、ppear on the outside of each package.16. Keywords16.1 composite conductors; concentric-lay-stranded copper conductor; copper-clad steel conductor; copper electrical conductor;electrical conductor; electrical conductorcopper; stranded copper conductorEXPLANATORY NOTESNOTE 1Joints or splices in indivi
45、dual copper-clad steel wires in their finished size are made by electrical butt welding. Two types of joints are usedand are described as follows:(a) Weld-Annealed JointsAfter butt welding, the wire is annealed for a distance of approximately 5 in. (127 mm) on each side of the weld. The weldthen is
46、protected from corrosion with one of two approaches:(1) A snug-fitting seamless copper sleeve that extends at least38 in. (9.5 mm) on each side of the weld and that is thoroughly sealed to the wire withsolder. The wall thickness of the sleeve is at least 10 % of the radius of the wire.(2) Protect th
47、e weld from corrosion and ensure acceptable conductivity through the use of silver solder that extends at least38 in. (9.5 mm) on eachside of the weld.This joint has a tensile strength of approximately 60 000 psi (415 MPa). This is less than the strength of the individual wires, but an allowance is
48、madefor this in the rated strength of the conductor as a whole. The completed conductor when containing such joints is required to have the full rated strength.This type of joint is only slightly larger than the wire itself and is applicable for 7-wire composite conductors (except Types F and G) and
49、 for 12- and19-wire composite conductors.(b) Compression-Weld JointsCompression-weld joints differ from weld-annealed joints in that the wire is not annealed after the butt-weldingoperation, but is reinforced with a hard-drawn, seamless, silicon-tin bronze sleeve which is applied by means of a hydraulic compressor over the weld.This sleeve is covered with solder so as to completely seal the ends. These sleeves have a wall thickness of 25 to 50 % of the radius of the wire, dependingon wire size. Their use is usually limited to 3-wire conductors where the relativ
