1、Designation: B 286 07Standard Specification forCopper Conductors for Use in Hookup Wire for ElectronicEquipment1This standard is issued under the fixed designation B 286; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of
2、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.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This specification covers uninsulate
3、d metallic-coatedcopper conductors for use in hookup wire for electronicequipment.1.2 The SI values for density are to be regarded as standard.For all other properties, the inch-pound values are to beregarded as the standard.2. Referenced Documents2.1 The following documents of the issue in effect o
4、n dateof material purchase form a part of this specification to theextent referenced herein:2.2 ASTM Standards:2B33 Specification for Tinned Soft or Annealed CopperWire for Electrical PurposesB 189 Specification for Lead-Coated and Lead-Alloy-Coated Soft Copper Wire for Electrical PurposesB 193 Test
5、 Method for Resistivity of Electrical ConductorMaterialsB 258 Specification for Nominal Diameters and Cross-Sectional Areas of AWG Sizes of Solid Round Wires Usedas Electrical ConductorsB 298 Specification for Silver-Coated Soft or AnnealedCopper WireB 355 Specification for Nickel-Coated Soft or Ann
6、ealedCopper Wire3. Ordering Information3.1 Orders for material under this specification shall includethe following information:3.1.1 Quantity of each size, designation (Table 1) and type,3.1.2 Conductor size, designation, construction, and type(Table 1).3.1.3 Whether tin, lead alloy, silver-coated,
7、or nickel-coated(see 4.1).3.1.4 For silver-coated conductors and nickel-coated con-ductors, class of coating (see 4.1), and when required, unan-nealed (see 4.2),3.1.5 Desired constructions where alternates are given(Table 1, Type II and, 5.1, 6.1, and 6.2),3.1.6 Package size (Section 12).3.1.7 Speci
8、al package marking if required (Section 11), and3.1.8 Place of inspection (Section 10).4. General Requirements4.1 Coating of WiresThe coating of the solid conductorsand the wires composing stranded conductors (before strand-ing) shall conform to the coating requirements of ASTMSpecifications B 33, B
9、 189, B 298, and B 355, as indicated onthe purchase order.4.2 TemperUnless otherwise specified, all coated conduc-tors shall be furnished in the annealed temper. When sospecified, silver-coated conductors or nickel-coated conductorsshall be furnished unannealed (Explanatory Note 1).NOTE 1The term un
10、annealed as used in this specification meanscold-worked conductor as produced on commercial wire-drawing ma-chines.4.3 ElongationThe elongation of annealed Type I conduc-tors shall be as specified in Specifications B 33, B 189, B 298,and B 355 as applicable. The elongation of stranded conductorsshal
11、l be permitted to vary from the requirements of theapplicable Specifications: B 33, B 189, B 298, and B 355 bythe following amounts:4.3.1 For stranded conductors 22 AWG and smaller, the testshall be performed on the whole conductor and the elongationmeasured when the first strand of the conductor br
12、eaks. Theminimum average elongation shall not be less than 10 % withno individual specimen less than 5 %.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 Alloys.Curren
13、t edition approved Oct. 1, 2007. Published October 2007. Originallyapproved in 1954. Last previous edition approved in 2002 as B 286 02.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume in
14、formation, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4.3.2 For stranded conductors larger than 22 AWG, strandsshall be carefully removed from the conductor and tes
15、ted forelongation. The minimum average elongation shall not be lessthan 10 % with no individual strand less than 5 %.4.4 D-C ResistanceThe d-c resistance in ohms per 1000 ftof annealed solid and stranded conductor shall not exceed,before insulating, the appropriate values prescribed in Table 1(Expla
16、natory Note 2).5. Conductor Construction5.1 Solid conductors shall conform to the requirements forType I conductors prescribed in Table 1.5.2 Stranded conductors shall conform to the requirementsfor Type II conductors prescribed in Table 1. The method ofstranding for conductor size designations 32-7
17、 through 10-104inclusive shall be at the option of the manufacturer unlessotherwise specified. Stranded conductors size designation 10-105 and larger shall normally be furnished in a rope-lay-stranded construction consisting of either 7 or 19 bunch-stranded members.6. Lay of Stranded Conductors6.1 T
18、he direction of lay of the outside layer of strandedconductors shall be left-hand. The direction of lay of thebunch-stranded members composing rope-lay-stranded con-ductors shall be at the option of the manufacturer unlessotherwise specified.6.2 The direction of lay of the outer layer of rope-lay-st
19、randed conductors shall be lefthand. The direction of lay ofthe other layers shall be reversed in successive layers, unlessotherwise specified.6.3 The length of lay of the outside layer of strandedconductors in size designation 32-7 through 10-104, inclusive,shall conform to the values in Table 1 (E
20、xplanatory Note 3).For strand constructions containing more than one distinctlayer the length of lay of the inner layer shall not exceed themaximum value shown in Table 1 for the conductor inquestion. For rope-lay-stranded conductors size designation10-105 and larger, and size 49/0.0142, the length
21、of lay of thewires composing the bunch-stranded members shall be notmore than 30 times the diameter of the member, and the lengthof lay of the outer layer of rope-lay-stranded conductors shallbe not less than 8 nor more than 16 times the outside diameterof the completed conductor.7. Joints7.1 Necess
22、ary joints in the individual wires of conductorssize designation 32-7 through size designation 10-104, inclu-sive, may be silver soldered, brazed, or butt welded. (Explana-tory Note 4). Bunch-stranded members composing ropelay-stranded conductors may be joined as a unit by brazing andthese joints sh
23、all be at least two lay lengths apart and befinished off so that the conductor diameter is not increased atthe joint. Disposition of joints throughout the conductor shallbe such that the diameter, configuration, conductor resistance,flexibility, and mechanical strength are not substantially af-fecte
24、d.8. Physical and Electrical Tests8.1 Tests to determine conformance of the coating to therequirements of Specifications B 33, B 189, B 298, or B 355shall be performed on Type I conductors before insulating andon the individual wires of Type II conductors before stranding.8.2 Tests to determine conf
25、ormance to the elongation re-quirements prescribed in 4.3 shall be made before insulating.8.3 Tests to determine conformance to the electrical resis-tance requirements prescribed in Table 1 shall be made on theuninsulated conductor in accordance with Test Method B 193(Explanatory Note 2).8.4 Examina
26、tion for workmanship of finished uninsulatedstranded conductorA visual inspection with the unaided eyeshall be performed on the outer layer of the conductor on thesupplied package. Use a white card (as a background) toascertain if any base metal is exposed through a break in thecoating. Detection of
27、 any base metal constitutes rejection.8.5 Examination for workmanship of finished uninsulatedstranded conductorA visual inspection with 10X magnifica-tion and with a white background shall be performed on aconductor sample taken from the top of the supplied spool. Thesample shall be a minimum of 12
28、in. (30 cm) in length. Theouter surface of all stranded constructions shall be examined.Detection of excessive exposed base metal due to thestranding process, such as indications along one side of thesample due to excessive localized abrasion during stranding,constitutes rejection. Continuous lines
29、or patterns of exposedbase metals constitute rejection. Small random point failuresshall not be cause for rejection.9. Density9.1 For the purpose of calculating mass, cross-sectionalarea, etc., the density of the coated copper shall be taken as8.89 g/cm3(0.32117 lb/in.3) at 20C (Explanatory Note 5).
30、10. Inspection10.1 All tests and inspection shall be made at the place ofmanufacture unless otherwise especially agreed upon by themanufacturer and the purchaser at the time of purchase. Themanufacturer shall afford the inspector representing the pur-chaser all reasonable facilities, without charge,
31、 to satisfy himthat the material is being furnished in accordance with thisspecification.11. Product Marking11.1 The net mass, length (or lengths, and number oflengths, if more than one length is included in the package),size designation, type of conductor, purchase order number,and any other marks
32、required by the purchase order shall bemarked on a tag attached to the end of the conductor inside ofthe package. The same information, together with the manu-facturers serial number (if any) and all shipping marksrequired by the purchaser, shall appear on the outside of eachpackage.12. Packing and
33、Package Marking12.1 Package sizes for conductors shall be agreed upon bythe manufacturer and the purchaser in the placing of individualorders.B28607212.2 The conductors shall be protected against damage inordinary handling and shipping.13. Keywords13.1 copper hookup wire; electronic equipment hookup
34、wire; electronic hookup wire; hookup wireTABLE 1 Details of Conductor ConstructionType I (Solid Conductors)SizeDesignation,AWGNominalArea,cmilsNominalDiameter, in.D-C Resistance at 20C, V/1000 ft, max (Explanatory Note 2)Annealed Tin orLead-Alloy CoatedAnnealedSilverCoatedClass 2NickelAClass 10Nicke
35、lClass 27Nickel10 10380 0.1019 1.06 1.02 1.05 1.17 1.4412 6530 0.0808 1.69 1.62 1.68 1.84 2.2814 4110 0.0641 2.68 2.58 2.67 2.93 3.6316 2580 0.0508 4.26 4.10 4.27 4.65 5.7718 1620 0.0403 6.78 6.52 6.79 7.39 9.1720 1020 0.0320 10.7 10.3 10.8 11.8 14.622 640 0.0253 17.2 16.5 17.3 18.8 23.324 404 0.020
36、1 27.2 26.2 27.3 29.8 36.926 253 0.0159 44.5 41.9 43.8 47.5 58.928 159 0.0126 70.8 66.8 69.4 75.4 107.030 100 0.0100 114.0 106.0 110.0 120.0 149.0Type II (Stranded Conductors)Conductor Construction D-C Resistance at 20C, V/1000 ft, max (Explanatory Note 2)SizeDesignationBNumberof WiresCNominalDiamet
37、er ofEach Wire,in.CalculatedCross-SectionalArea, cmilsMaximumAllowableDiameter, in.DLength of Lay,in.(ExplanatoryNote 3)AnnealedTin orLead-AlloyCoatedAnnealedSilverCoated50 to 100in.of NickelEClass 10NickelClass 27Nickel00002109 2109F0.0100 210 900 0.635 . 0.0576 0.0537 0.0559(2) 0.0610 0.0756000167
38、2 1672F0.0100 167 200 0.545 . 0.0727 0.0677 0.0705(2) 0.0770 0.0954001330 1330F0.0100 133 000 0.486 . 0.0914 0.0851 0.0887(2) 0.0967 0.12001064 1064F0.0100 106 400 0.435 . 0.114 0.106 0.111(2) 0.121 0.15001045 1045F0.0100 104 500 0.431 . 0.116 0.108 0.113(2) 0.123 0.1531836 836F0.0100 83 600 0.386 .
39、 0.145 0.135 0.141(2) 0.154 0.1911817E817F0.0100 81 700E0.382 . 0.149 0.139 0.144(2) 0.158 0.1952665 665F0.0100 66 500 0.342 . 0.183 0.170 0.177(2) 0.194 0.2404133E133F0.0179 42 615E0.274 . 0.280 0.263 0.274(2) 0.299 0.3714420 420G0.0100 42 000 0.275 . 0.289 0.270 0.281(2) 0.306 0.3806133E133F0.0142
40、 26 818E0.217 . 0.444 0.418 0.436(2) 0.475 0.5896266 266G0.0100 26 600 0.220 . 0.457 0.426 0.443(2) 0.484 0.6008133E133F0.0113 16 983E0.173 . 0.701 0.661 0.688(2) 0.751 0.9308168 168G0.0100 16 800 0.177 . 0.724 0.674 0.702(2) 0.766 0.94910105 105G1.0100 10 500 0.130 1.2 to 1.8 1.15 1.07 1.11(2) 1.21
41、 1.5010104 104H0.0100 10 400 0.130 1.7 to 2.1 1.16 1.08 1.12(2) 1.23 1.521049E49G0.0142 9 880G0.132 . 1.21 1.14 1.18(2) 1.29 1.601037E37E0.0159 9 354E0.115 1.10 to 1.75 1.26 1.19 1.24(2) 1.35 1.671265 65H0.0100 6 500 0.099 1.3 to 1.7 1.85 1.73 1.80(2) 1.96 2.43Type II (Stranded Conductors)Conductor
42、Construction D-C Resistance at 20C, V/1000 ft, max (Explanatory Note 2)SizeDesignationBNumberof WiresCNominalDiameter ofEach Wire, in.CalculatedCross-SectionalArea, cmilsMaximumAllowableDiameter, in.DLength of Lay,in.(ExplanatoryNote 2)AnnealedTin orLead-AlloyCoatedAnnealedSilverCoated50 to 100 in.o
43、f NickelIClass 10NickelClass 27Nickel1237E37E0.0126 5 874E0.091 0.90 to 1.45 2.01 1.89 1.97(2) 2.15 2.661219E19J0.0179 6 088E0.093 0.90 to 1.45 1.92 1.81 1.88(2) 2.05 2.551441 41H0.0100 4 100 0.081 0.80 to 1.35 2.94 2.74 2.85(2) 3.11 3.851419E19J0.0142 3 831E0.073 0.80 to 1.15 3.05 2.87 2.99(2) 3.26
44、 4.051626 26H0.0100 2 600 0.062 0.60 to 0.90 4.59 4.27 4.45(2) 4.86 6.021619E19J0.0113 2 426E0.059 0.60 to 0.90 4.82 4.54 4.73(2) 5.15 6.391826E26H0.0080 1 664E0.050 0.50 to 0.70 7.20 6.71 7.14(4) 7.63 9.451819E19J0.0100 1 900E0.052 0.50 to 0.70 6.22 5.79 6.03(2) 6.58 8.16187E7J0.0159 1 770E0.050 0.
45、50 to 0.70 6.54 6.16 6.42(2) 7.00 8.672019E10J0.0080 1 216E0.042 0.45 to 0.55 9.76 9.10 9.68(4) 10.3 12.82010 10H0.0100 1 000 0.040 0.45 to 0.55 11.8 11.0 11.5(2) 12.5 15.5207E7J0.0126 1 111E0.039 0.45 to 0.55 10.4 9.81 10.2(2) 11.1 13.82219E19J0.0063 754E0.033 0.25 to 0.43 15.9 14.8 15.7(4) 16.8 20
46、.8B286073TABLE 1 ContinuedType II (Stranded Conductors)Conductor Construction D-C Resistance at 20C, V/1000 ft, max (Explanatory Note 2)SizeDesignationBNumberof WiresCNominalDiameter ofEach Wire, in.CalculatedCross-SectionalArea, cmilsMaximumAllowableDiameter, in.DLength of Lay,in.(ExplanatoryNote 2
47、)AnnealedTin orLead-AlloyCoatedAnnealedSilverCoated50 to 100 in.of NickelIClass 10NickelClass 27Nickel227E7J0.0100 700E0.031 0.25 to 0.43 16.7 15.6 16.2(2) 17.7 21.92419E19J0.0050 475E0.027 0.25 to 0.35 25.4 23.6 25.2(4) 26.9 33.3247E7J0.0080 448E0.025 0.25 to 0.35 26.2 24.5 26.0(4) 27.8 34.42619E19
48、J0.0040 304E0.022 0.25 to 0.30 40.1 37.3 41.0(7) 42.4 52.6267E7J0.0063 278E0.020 0.25 to 0.30 42.6 39.7 42.2(4) 45.1 55.92819E19J0.0031 183E0.017 0.25 to 0.30 67.7 63.1 69.3(7) 71.7 88.8287E7J0.0050 175E0.016 0.25 to 0.30 68.2 63.6 67.6(4) 72.2 89.5307E7J0.0040 112E0.013 0.25 to 0.30 108.0 100.0 110
49、.0(7) 114.0 141.0327E7J0.0031 67g0.011 0.10 to 0.30 182.0 170.0 186.0(7) 193.0 239.0AProvides minimum of 50 in. of nickel.BThese size designations are solely for purposes of identification. They should not be confused with AWG sizes.CThe stranded conductor constructions shown in this table provide for finished noninsulated conductors having the indicated cross-sectional area. The number ofcomponent wires may vary slightly provided the specified resistances are not exceeded.DThe maximum allowable diameters of these conductors a
