1、Designation: B 400 08Standard Specification forCompact Round Concentric-Lay-Stranded Aluminum 1350Conductors1This standard is issued under the fixed designation B 400; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of las
2、t 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 aluminum 1350-H19 (extrahard), 1350-H16 or -H26 (n hard), 1350-H14 or -H24 (12hard) and 1350-H1
3、42 or -H242 (12 hard) bare compact-roundconcentric-lay-stranded conductors made from round or shapedwires for use as uninsulated electrical conductors or in coveredor insulated electrical conductors. These conductors shall becomposed of a central core surrounded by one or more roller ordie compacted
4、 layers of helically applied wires (ExplanatoryNote 1 and Note 2).1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combi
5、ningvalues from the two systems may result in non-conformancewith the standard.NOTE 1Prior to 1975, aluminum 1350 was designated as EC alumi-num.NOTE 2The aluminum and temper designations conform to ANSIStandard H35.1. Aluminum 1350 corresponds to Unified NumberingSystem A91350 in accordance with Pr
6、actice E 527.2. Referenced Documents2.1 ASTM Standards:2B 230/B 230M Specification for Aluminum 1350H19Wire for Electrical PurposesB 231/B 231M Specification for Concentric-Lay-StrandedAluminum 1350 ConductorsB 263 Test Method for Determination of Cross-SectionalArea of Stranded ConductorsB 354 Term
7、inology Relating to Uninsulated Metallic Elec-trical ConductorsB 609/B 609M Specification for Aluminum 1350 RoundWire, Annealed and Intermediate Tempers, for ElectricalPurposesE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE 527 Practice for Numberi
8、ng Metals and Alloys in theUnified Numbering System (UNS)2.2 Other Documents:ANSI H35.1/H35.1(M) Alloy and Temper Designation Sys-tems for Aluminum3NBS Handbook 100-Copper Wire Tables, of the NationalBureau of Standards43. Classification3.1 For the purpose of this specification, conductors areclassi
9、fied as follows:3.1.1 Class AAFor bare conductors usually used in over-head lines.3.1.2 Class AFor conductors to be covered with weather-resistant materials, and for bare conductors where greaterflexibility than is afforded by ClassAAis required. Conductorsindicated for further fabrication into tree
10、 wire or to be insulatedand laid helically with or around aluminum or ACSR messen-gers, shall be regarded as Class A conductors with respect todirection of lay only (see 6.3).3.1.3 Class BFor conductors to be insulated with variousmaterials such as rubber, paper, varnished cloth, and so forth,and fo
11、r the conductors indicated under Class A where greaterflexibility is required.4. Ordering Information4.1 Orders for material under this specification shall includethe following information:4.1.1 Quantity of each size and class (Table 1),4.1.2 Conductor size; circular-mil area orAWG (Section 7),4.1.3
12、 Class (Section 3),4.1.4 Temper (Section 13),4.1.5 Lay direction if nonstandard (see 6.3 and 6.4), re-versed or unidirectional (see 6.4) or special (see 6.5),4.1.6 Special tension test, if required (see 17.2),4.1.7 Place of inspection (Section 18), and1This specification is under the jurisdiction of
13、 ASTM Committee B01 onElectrical Conductors and is the direct responsibility of Subcommittee B01.07 onConductors of Light Metals.Current edition approved Sept. 1, 2008. Published October 2008. Originallyapproved in 1963. Last previous edition approved in 2004 as B 400 04.2For referenced ASTM standar
14、ds, 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 American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, N
15、ew York, NY 10036, http:/www.ansi.org.4Available from National Technical Information Service (NTIS), 5285 PortRoyal Rd., Springfield, VA 22161, http:/www.ntis.gov.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4.1.8 Packaging and Pa
16、ckage Marking (Section 19).5. Joints5.1 1350-H19 Conductors for Use in Bare OverheadLines:5.1.1 Joints may be made in the six outer wires of seven-strand conductors by cold-pressure welding or by electric-butt,cold-upset welding, but not by electric-butt welding. Joints arenot permitted in the finis
17、hed center wire of seven-strandedconductors.5.1.2 Joints may be made in any of the wires in conductorsof 18 or more wires by electric-butt welding, cold-pressurewelding, or electric butt, cold-upset welding.5.1.3 The minimum distance between a wire joint andanother joint either in the same wire or i
18、n other wires of thecompleted conductor shall be 50 ft (15 m).5.2 Conductors of All Tempers to Be Insulated or Covered:5.2.1 Joints may be made in any of the wires of anystranding by electric-butt welding, cold-pressure welding, orelectric-butt, cold-upset welding.5.2.2 Joints in the individual wire
19、s in a finished conductorshall be not closer together than 1 ft (0.3 m) for conductors of19 wires or less, or closer than 1 ft in a layer for conductors ofmore than 19 wires.5.3 No joint or splice shall be made in a stranded conductoras a whole.6. Lay6.1 The length of lay or each layer for Classes A
20、A and Ashall be not less than 11 nor more than 17.5 times the outsidediameter of that layer.TABLE 1 Construction of Compact-Round Concentric-Lay-Stranded, Aluminum ConductorsNOTE 1Metric values listed below represent a soft conversion and as such they may not be the same as those metric values which
21、 are calculated fromthe basic metric density.Conductor SizeClassNumber ofWiresNominal CompactConductor DiameterNominalMass per1000 ft, lbNominal Massper Kilometer,kgANominal DC Resistanceat 20CCircular Mils AWG mm2in. mm V/1000 ft V/km1 100 000 557 B 61B1.112 28.2 1031 1537 0.0157 0.05161 000 000 50
22、7 B 61B1.060 26.9 937 1394 0.0173 0.0563900 000 456 B 61B0.999 25.4 844 1257 0.0193 0.0632800 000 405 B 61B0.938 23.8 750 1116 0.0217 0.0712750 000 380 B 61B0.908 23.1 703 1046 0.0231 0.0759700 000 355 B 61B0.877 22.3 656 976 0.0248 0.0813650 000 329 B 61B0.845 21.5 609 906 0.0267 0.0875600 000 304
23、B 61B0.813 20.7 563 838 0.0289 0.0948556 500 282 AA 19C0.780 19.8 521 775 0.0312 0.102550 000 279 B 61B0.775 19.7 516 768 0.0315 0.103500 000 253 B 37D0.736 18.7 468 696 0.0347 0.114500 000 253 AA 19C0.736 18.7 468 696 0.0347 0.114477 000 242 AA 19C0.722 18.3 447 665 0.0364 0.119450 000 228 B 37D0.7
24、00 17.8 422 628 0.0385 0.126400 000 203 B 37D0.659 16.7 375 558 0.0434 0.142397 500 201 AA, A 19C0.659 16.7 372 554 0.0436 0.143350 000 177 B 37D0.616 15.6 328 488 0.0495 0.162350 000 177 A 19C0.616 15.6 328 488 0.0495 0.162336 400 170 A 19C0.603 15.3 315 469 0.0516 0.169336 400 170 AA 7 0.603 15.3
25、315 469 0.0516 0.169300 000 152 B 37D0.570 14.5 281 418 0.0578 0.190300 000 152 A 19C0.570 14.5 281 418 0.0578 0.190300 000 152 AA 7 0.570 14.5 281 418 0.0578 0.190266 800 135 A 19C0.537 13.6 250 372 0.0650 0.213266 800 135 AA 7 0.537 13.6 250 372 0.0650 0.213250 000 127 B 37D0.520 13.2 234 348 0.06
26、94 0.228250 000 127 A 19C0.520 13.2 234 348 0.0694 0.228250 000 127 AA 7 0.520 13.2 234 348 0.0694 0.228211 600 0000 107 B 19C0.475 12.1 198 295 0.0820 0.269211 600 0000 107 AA, A 7 0.475 12.1 198 295 0.0820 0.269167 800 000 85.0 B 19C0.423 10.7 157 234 0.103 0.338167 800 000 85.0 AA, A 7 0.423 10.7
27、 157 234 0.103 0.338133 100 00 67.4 B 19C0.376 9.55 125 186 0.130 0.428133 100 00 67.4 AA, A 7 0.376 9.55 125 186 0.130 0.428105 600 0 53.5 B 19C0.336 8.53 98.9 147 0.164 0.539105 600 0 53.5 AA, A 7 0.336 8.53 98.9 147 0.164 0.53983 690 1 42.4 B 19C0.299 7.59 78.4 117 0.207 0.68083 690 1 42.4 AA, A
28、7 0.299 7.59 78.4 117 0.207 0.68066 360 2 33.6 AA, A, B 7 0.268 6.81 62.2 92.6 0.261 0.85752 620 3 26.7 A, B 7 0.238 6.05 49.3 73.3 0.330 1.0841 740 4 21.2 A, B 7 0.213 5.41 39.1 58.2 0.416 1.3626 240 6 13.3 A, B 7 0.169 4.29 24.6 36.6 0.661 2.1716 510 8 8.37 A, B 7 0.134 3.40 15.5 23.1 1.05 3.44A1
29、lb/1000 ft = 1.488 kg/km.B58 wires minimum.C18 wires minimum.D35 wires minimum.B4000826.2 The length of lay of the outer layer for Class B shall benot less than 8 nor more than 16 times the outside diameter ofthe completed conductor, except that for sizes No. 2 AWG(33.6 mm2) and smaller, the maximum
30、 length of lay shall benot more than 17.5 times the outside diameter of the completedconductor.6.3 The direction of lay of the outer layer shall be right-handfor Classes AA and A, and it shall be reversed in successivelayers. For Class A stranding where the conductors are to beinsulated and laid hel
31、ically with or around aluminum or ACSRmessengers, the stranding lay direction may be unidirectionalor unilay in successive layers.6.4 The direction of lay of the outer layer shall be left-handfor Class B, and it shall be reversed in successive layers,unidirectional, or unilay.6.5 Other lay requireme
32、nts may be furnished by specialagreement between the manufacturer and the purchaser.7. Construction7.1 The construction of the conductors shall be as shown inTable 1 as to number of wires and cross-sectional area of thecompleted conductor, and the lay shall be in accordance withSection 6.7.2 Wire us
33、ed in the fabrication of conductor shall be ofsuch dimensions as to produce a finished conductor having anominal cross-sectional area and diameter as prescribed inTable 1.8. Rated Strength of Conductor8.1 The rated strength of 1350-H19 conductors shall betaken as the percentage, indicated in Table 2
34、, of the sum of thestrengths of the component wires, calculated on the basis of thenominal wire diameter for the corresponding noncompactedconstruction given in Specification B 231/B 231M and thespecified minimum average tensile strength given in Specifi-cation B 230/B 230M for 1350-H19 wire. A valu
35、e of 0.1343(3.41 mm) shall be used for the nominal wire diameter for the1100 kcmil compacted construction.8.2 Calculations for rated strengths of 1350-H16, -H26,-H14, -H24, -H142, and -H242 conductors shall be made onthe basis of the strengths of the component wires using thenominal wire diameter fo
36、r the noncompacted constructiongiven in Specification B 231/B 231M and the specified maxi-mum and minimum tensile strengths for the appropriate temperof the respective component wires given in SpecificationB 609. The minimum rated strengths of the conductors shall betaken as the sum of the calculate
37、d minimum strengths of thecomponent wires multiplied by the rating factor given in Table2.The maximum rated strength of the conductors shall be takenas the sum of the calculated maximum strengths of thecomponent wires. A value of 0.1343 (3.41 mm) shall be usedfor the nominal wire diameter for the 11
38、00 kcmil compactedconstruction.8.3 Rated-strength and breaking-strength values shall berounded to three significant figures, in the final value only, inaccordance with the rounding method of Practice E29.8.4 Rated strengths of conductors are given in Table 3.9. Density9.1 For the purpose of calculat
39、ing mass, linear density, crosssections, and so forth, the density of aluminum 1350 shall betaken as 2705 kg/m3(0.0975 lb/in.3) at 20C.10. Mass and Electrical Resistance10.1 The mass and electrical resistance of a unit length ofstranded conductor are a function of the length of lay. Theapproximate m
40、ass and electrical resistance may be determinedusing an increment of 2 %. When greater accuracy is desired,the increment based on the specific lay of the conductor may becalculated (Explanatory Note 1).10.2 The maximum electrical resistance of a unit length ofstranded conductor shall not exceed the
41、nominal dc resistance(Table 1) +2 % (Explanatory Note 1).10.2.1 When the dc resistance is measured at other than20C, it is to corrected by using the multiplying factor given inTable 4.10.3 For conductors to be used in covered or insulated wiresor cables, direct current (DC) resistance measurement ma
42、y beused instead of the method outlined in Section 14 to determinecompliance with this specification.11. Mechanical and Electrical Tests of ConductorsFabricated from Wires other than 1350-H26, -H24, or-H242 and Annealed after Stranding to Meet 1350-H26, -H24, or -H242 Requirements11.1 The completed
43、conductor shall be tested as a unit. Theminimum breaking strength of bare conductors shall be not lessthan minimum rated strength if failure occurs in the free lengthat least 1 in. (25 mm) beyond the end of either gripping device,or shall be not less than 95 % of the minimum rated strength iffailure
44、 occurs inside, or within 1 in. of the end of eithergripping device. The maximum breaking strength of 1350-H26, -H24, or -H242 conductors shall be not greater than theirmaximum rated strengths. The free length between grips of thetest specimen shall be not less than 24 in. (600 mm), and careshall be
45、 taken to ensure that the wires in the conductor areevenly gripped during the test (Section 8 and Explanatory Note3).12. Workmanship, Finish, and Appearance12.1 The conductor shall be clean and free from imperfec-tions not consistent with good commercial practice.13. Requirements of Wires13.1 Before
46、 stranding and compacting, the round wire usedshall meet the requirements of Specifications B 230/B 230M orB 609, whichever is applicable.TABLE 2 Rating FactorsStrandingRating Factor, %Number of Wires inConductor Number of Layers719619A29337B39161C490A18 wires minimum.B35 wires minimum.C58 wires min
47、imum.B40008313.2 Wire shaped before stranding shall meet the require-ments of the appropriate specification listed in 13.1 except fortensile and elongation requirements and diameter tolerance.For 1350-H19 temper, the minimum tensile and elongationrequirements shall be 96 % of those for round wire of
48、 the samenominal area, provided the completed conductor is capable ofmeeting the requirements of Sections 8 and 17. For 1350-H16or -H26, 1350-H14 or -H24, and 1350-H142 or -H242, thetensile requirements shall be the same as those for round wiresof equal nominal area. The area tolerances for shaped w
49、ire ofall tempers shall be such that the finished conductor conformsto Section 14.14. Variation in Area14.1 The cross-sectional area of the conductor shall be notless than 98 % of the cross-sectional area as specified inColumn 1 of Table 1.14.2 The manufacturer shall determine the cross-sectionalarea by Test Method B 263. In applying this method, theincrement in weight resulting from stranding may be theapplicable value specified in 10.1 or it may be calculated fromthe measured dimensions of the sample under test. In case ofquestion regarding area compliance, the act
