1、Designation: B 354 05Standard Terminology Relating toUninsulated Metallic Electrical Conductors1This standard is issued under the fixed designation B 354; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A
2、 number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.INTRODUCTIONThese terminologies relate only to interpretations as applied to uninsulated metallic electricalconductors in specifications under th
3、e jurisdiction ofASTM Committee B01 on Electrical Conductors,and do not necessarily correspond to the definitions used in other fields.1. Scope1.1 This terminology standard defines abbreviations andterms specific to uninsulated electrical conductors. For termsrelating to superconductors, see Termino
4、logy B 713.2. Referenced Documents2.1 ASTM Standards:2B 193 Test Method for Resistivity of Electrical ConductorMaterialsB 713 Terminology Relating to Superconductors33. AbbreviationsAAACall aluminum alloy conductorAACaluminum conductor.AACSRaluminum alloy conductor, steel reinforced.ACARaluminum con
5、ductor, aluminum alloy reinforced.ACSRaluminum conductor, steel reinforced.AWaluminum clad steel wire.AZaluminum coated (aluminized) steel wire.CCAcopper-clad aluminumCCScopper-clad steelCOMPcompact construction.GAzinc coated (galvanized) steel wire, coating class A.GBzinc coated (galvanized) steel
6、wire, coating class B.GCzinc coated (galvanized) steel wire, coating class C.HSzinc coated (galvanized) high strength steel wire.MAzinc-5 % aluminum-mischmetal alloy coated steelwire, coating class A.MBzinc-5 % aluminum-mischmetal alloy coated steelwire, coating class B.MCzinc-5 % aluminum-mischmeta
7、l alloy coated steelwire, coating class C.MSzinc-5 % aluminum-mischmetal alloy coated highstrength steel wire.SDself dampening construction.SIWsingle input wire construction.TWtrapezoidal shaped wire.Zn-5Al-MMzinc-5 % aluminum-mischmetal alloy coat-ing.4. Terminology4.1 Definitions:aeolian vibration
8、resonant vibration of a conductor causedby the alternate shedding of wind-induced vortices fromopposite sides of the conductor. (Frequency is usually lessthan 200 Hz and amplitude rarely exceeds one conductordiameter.)annealed wiresee soft wire.area densitymass per unit area.bare conductora conducto
9、r having no nonmetallic cover-ing.brazingthe joining of ends of two wires, rods, or groups ofwires with a nonferrous filler metal at temperatures above800F 427C.breaking strengththe maximum load that a conductorattains when tested in tension to rupture.bunch-stranded conductora conductor composed of
10、 wirestwisted together with a given length and direction of lay insuch manner that the respective wires at successive crosssections along the length of the conductor do not necessarilyform a symmetrical geometric pattern, nor necessarily oc-cupy the same positions relative to each other.1This termin
11、ology is under the jurisdiction of ASTM Committee B01 onElectrical Conductors and is the direct responsibility of Subcommittee B01.01 onEditorial and Records.Current edition approved Mar. 1, 2005. Published March 2005. Originallyapproved in 1960. Last previous edition approved in 1998 as B 354 98.2F
12、or referenced ASTM standards, 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.3Withdrawn.1Copyright ASTM International, 100 Barr Harbor Drive
13、, PO Box C700, West Conshohocken, PA 19428-2959, United States.circular mil (cmil)a unit of area equal to the area of a circleone mil (0.001 in., 0.0254 mm) in diameter. The area of acircle in circular mils is equal to the square of the diameterin mils area(cmils) = diameter(mils)2, 1 cmil = 7.854 3
14、107in.25.067 3 1010m2.clad wirewire comprised of a given metal covered with arelatively thick application of a different metal. The bondingprocess is normally a combination of heat and pressure andresults in a metallurgical bond.coated wirewire comprised of a given metal covered with arelatively thi
15、n application of a different metal. The coatingprocess is normally electroplating or dip coating.cold-drawingreducing the cross section by pulling througha die or dies, at a temperature lower than the bination stranded conductora conductor constructedwith wires of different diameters with such diffe
16、rencesoccurring either within a single layer or from layer to pact stranded conductora unidirectional or unilay orconventional concentric conductor, constructed with a cen-tral core surrounded by one or more layers of helically laidwires and formed into final shape by rolling, drawing, orother means
17、; and manufactured to a specified nominaldiameter, approximately 8 to 10 % below the nominaldiameter of a conventional non-compact conductor of thesame cross-sectional pressed stranded conductora unidirectional or unilayor conventional concentric conductor manufactured to aspecified nominal diameter
18、 3 % less than the calculateddiameter of non-compressed conductor of the same con-struction and cross-sectional posite conductora conductor consisting of two or moretypes of wire, each type of wire being plain, clad, or coated;stranded together to operate mechanically and electrically asa single con
19、ductor.concentric-lay conductorconductor constructed with a cen-tral core surrounded by one or more layers of helically laidwires. Several types are as follows:compact round conductorsee compact stranded conduc-tor.conventional concentric conductorconductor constructedwith a round central core surro
20、unded by one or more layersof helically laid round wires. The direction of lay is reversedin successive layers, and generally with an increase in lengthof lay for successive layers.equilay conductorconductor constructed with a centralcore surrounded by more than one layer of helically laidwires, all
21、 layers having a common length of lay, direction oflay being reversed in successive layers.parallel core conductorconductor constructed with a cen-tral core of parallel-laid wires surrounded by one layer ofhelically laid wires.rope-lay conductorconductor constructed of a bunch-stranded or a concentr
22、ic-stranded member or members, as acentral core, around which are laid one or more helical layersof such members.unidirectional conductorconductor constructed with acentral core surrounded by more than one layer of helicallylaid wires, all layers having a common direction of lay, withincrease in len
23、gth of lay for each successive layer.unilay conductorconductor constructed with a central coresurrounded by more than one layer of helically laid wires.All layers having a common direction of lay and essentiallysimilar length of lay, which is a multiple of the outerdiameter of the finished conductor
24、, for each successive layer.The lay length of the inner layers shall not vary by more than610 % of the lay length of the outer layer.conductora wire or combination of wires not insulated fromone another, suitable for carrying an electric current.conductor corethe center strand or member about whicho
25、ne or more layers of wires or members are laid helically toform a concentric-lay.continuous cast drawing stockthe as-rolled section, nor-mally round, produced by a continuous casting and rollingprocess.coresee conductor core.cored, annular, conductora conductor in which one ormore layers of wires ar
26、e laid helically around a central coreof metallic or nonmetallic material. The core is used as amandrel for the application of subsequent layers of wire tomaintain consistent spacing of these members around theconductor axis.direction of laythe lateral direction, designated as left-handor right-hand
27、, in which the wires of a member or units of aconductor run over the top of the member or conductor asthey recede from an observer looking along the axis of themember or conductor.drawing stockthe as-rolled or extruded section, normallyround, made from any of a variety of manufacturing pro-cesses, i
28、ntended as feed stock for subsequent drawingoperations.electric-butt, cold-upset welda weld between two preparedends of adjacent lengths of work-hardenable material that ispressed together in a resistance welding apparatus whichmelts the abutting ends to unite them and form the weld. Inturn, the res
29、ulting weld zone is forced out in the form of flashby a cold-upsetting operation which, through cold-working,restores the material substantially to its original tensilestrength.equilay conductorsee concentric-lay conductor.fill factorthe ratio of the weight of a given length of astranded conductor t
30、o the weight of the solid conductor ofthe same diameter, length, and material. It may also beexpressed by the ratio of the nominal area of the conductortimes (1 plus the stranding factor) and the area of the circlethat encloses the strands of the conductor.galvanized steel wiresteel wire coated with
31、 zinc.half-hard wireas applied to aluminum, wire that has beenprocessed so as to produce a strength approximately midwaybetween that of soft wire and that of hard-drawn wire.hard-drawn wireas applied to aluminum and copper, wirethat has been cold drawn to final size so as to approach themaximum tens
32、ile strength obtainable.hot-rolled drawing stockthe as-rolled section, normallyround, produced by hot rolling in a rod mill from a billet orwire bar.B354052intermediate temperas applied to aluminum, any temperbetween soft and hard drawn.jointthat portion of the conductor where the ends of twowires,
33、rods, or groups of wires are joined by brazing,soldering, welding, or by mechanical means.lay, n4one turn of the helix of a wire or member of a standardconductor. See also direction of lay and length of lay.lay, vto arrange the wires or members of a conductor eitherby twisting them or by forming the
34、m into one or more layershelically applied.lay factorthe ratio of the length of lay to the externaldiameter of the corresponding layer of wires or members inthe stranded conductor.length of laythe axial length of one turn of the helix of awire or member.linear densitymass per unit length.liquor-fini
35、shed wirewire, usually of ferrous material, drawnthrough a wet solution of metallic salts, that is, tin or copper,to facilitate drawing and to enhance the appearance andsurface characteristics of the finished wire, and not toprovide the properties of a coated wire.medium-hard drawn wireas applied to
36、 copper wire, havingtensile strength less than the minimum for hard-drawn wire,but greater than the maximum for soft wire.membera group of wires stranded together for combinationwith other stranded groups into a multiple-membered con-ductor.messenger wirea metallic supporting member either solid ors
37、tranded which may also perform the function of a conduc-tor.mila unit of length equal to11000 of an inch 0.0254 mm.nominal, adjname or identifying value of a measurableproperty by which a conductor or component or property ofa conductor is identified, and to which tolerances are applied.parallel-cor
38、e conductorsee concentric-lay conductor.percent conductivitythe ratio of the resistivity of theInternational Annealed Copper Standard (IACS) at 20C tothe resistivity of a material at 20C, expressed in percent.Results are calculated on a weight basis or volume basis andso specified.plain conductora c
39、onductor made up of one or more plainwires of the same metal.plain wirewire consisting of one metal only.rated strengththe strength in tension of a stranded conduc-tor calculated in accordance with specification requirements.resistance4the scaler property of an electric circuit or of anybody that ma
40、y be used as part of an electric circuit whichdetermines for a given current the rate at which electricenergy is converted into heat or radiant energy and whichhas a value such that the product of the resistance and thesquare of the current gives the rate of conversion of energy.In a dc circuit:P 5
41、I2Rwhere:P = power, W,I = current, A, andR = resistance, V.resistivitythe electrical resistance of a body of unit length,and unit cross-sectional area or unit weight. B 193rope-lay conductorsee concentric-lay conductor.self-damping conductora conductor with internal vibrationdamping properties which
42、 will protect itself from damagingstrains caused by aeolian vibration.single input wire constructiona stranded conductor designwhich varies the number of wires within a range of conduc-tor sizes in order to permit that range of conductor sizes tobe constructed from wires of a single diameter.soft wi
43、rewire that has been drawn or rolled to final size andthen heated to remove the effects of cold working.solid conductora conductor consisting of one wire.splicesee joint.stiffness (as applied to copper)the property of a conductorthat causes it to resist permanent deformation by bending.strain harden
44、ing5an increase in hardness and strengthcaused by plastic deformation at temperatures lower than therecrystallization range.strand, n4one of the wires of any stranded conductor.stranded conductora conductor composed of a group ofwires, usually twisted, or of any combination of such groupsof wires.st
45、randing factorthe ratio of the mass or electrical resistanceof a unit length of stranded conductor to that of a solidconductor of the same cross-sectional area. The strandingfactor m for the completed stranded conductor is the numeri-cal average of the stranding factors for each of the individualwir
46、es in the conductor, including the straight core wire, ifany (for which the stranding factor is unity). The strandingfactor (mind) for any given wire in a concentric-lay-strandedconductor is:mind5 =1 1 9.8696/n2!where:n =length of laydiameter of helical path of the wiretensile strengththe maximum lo
47、ad per unit of originalcross-sectional area that a conductor attains when tested intension to rupture.three-quarter-hard wireas applied to aluminum, wire thathas been processed to produce a strength approximatelymidway between that of half-hard wire and that of hard-drawn wire.tinned wiresee coated
48、wire.trapezoidal wirea wire with a keystone-shaped (wedge)cross section with two circular parallel sides (see Fig. 1).4From or adapted from American National Standard Definitions of ElectricalTerms (ANSI C42.351957) published by the Institute of Electrical and ElectronicsEngineers, Inc. (IEEE), 445
49、Hoes Ln., P.O. Box 1331, Piscataway, NJ 08854-1331.5Adapted from ASM Metals Handbook, Vol 1, “Properties and Selection ofMetals,” Am. Soc. Metals, 1961.B354053trolley wirea round or shaped, solid bare, hard conductorordinarily used to supply current to motors through travelingcurrent collectors.unidirectional conductorsee concentric-lay conductor.volume resistivitythe resistance in ohms of a body of unitlength and
