1、Designation:B94210(Reapproved 2015)Standard Guide forSpecification and Quality Assurance for the ElectricalContact Performance of Crimped Wire Terminations1This standard is issued under the fixed designation B942;the number immediately following the designation indicates the year oforiginal adoption
2、 or,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 guide contains practices for specifying and evalu-ating the electrical contact
3、 performance of crimped-type ter-minations with solid or stranded conductors.1.2 This guide provides information relevant to the electri-cal contact performance of a crimped wire termination.It doesnot cover other aspects of selection and use of crimpedterminals.1.3 The methods discussed in this gui
4、de apply only to thewire termination,which is the electrical contact interfacebetween the conductor(s)and the terminal.Other aspectsimportant to terminal evaluation,such as the properties andperformance of electrical insulation,the effectiveness of strainrelief features,and the quality of contact be
5、tween the terminaland other electrical circuit elements,are not included.1.4 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.I
6、t is theresponsibility of the user of this standard to become familiarwith all hazards including those identified in the appropriateSafety Data Sheet(SDS)for this product/material as providedby the manufacturer,to establish appropriate safety and healthpractices,and determine the applicability of re
7、gulatory limi-tations prior to use.2.Referenced Documents2.1 ASTM Standards:2B539 Test Methods for Measuring Resistance of ElectricalConnections(Static Contacts)B542 Terminology Relating to Electrical Contacts and TheirUseB827 Practice for Conducting Mixed Flowing Gas(MFG)Environmental TestsB845 Gui
8、de for Mixed Flowing Gas(MFG)Tests for Elec-trical ContactsB868 Practice for Contact Performance Classification ofElectrical Connection SystemsB913 Test Method for Evaluation of Crimped ElectricalConnections to 16-Gauge and Smaller Diameter Strandedand Solid ConductorsE122 Practice for Calculating S
9、ample Size to Estimate,WithSpecified Precision,the Average for a Characteristic of aLot or Process2.2 Other References:3UL486-A Wire connectors and Soldering Lugs for Use WithCopper ConductorsUL-310 Electrical Quick-Connect Terminals3.Terminology3.1 Many terms related to electrical contacts used in
10、thisguide are defined in Terminology B542.3.2 Definitions of Terms Specific to This Standard:3.2.1 connection resistance,nthe electrical resistance at-tributable to a wire termination over and above that of anidentical solid metallic structure without pressure contactinterfaces.For crimped terminati
11、ons that are the subject of thisguide,the connection resistance results from the resistance ofa multitude of contact regions having both film and constrictionresistance,plus,where stranded wire is involved,an additionalamount due to unequal current distribution among the wirestrands at the terminati
12、on.3.2.2 crimp,vto establish an electrical and mechanicalattachment between the two members by mechanically deform-ing one contact member around another.In most cases,onemember is a stranded or solid wire,or a group of wires,theother is a hollow cylinder or partial cylinder that is deformedaround th
13、e wire(s).3.2.3 crimp barrel,crimp tab,nthe portion of the crimpterminal that is deformed in the crimping operation.1This guide is under the jurisdiction of ASTM Committee B02 on NonferrousMetals and Alloys and is the direct responsibility of Subcommittee B02.11 onElectrical Contact Test Methods.Cur
14、rent edition approved Oct.1,2015.Published October 2015.Originallyapproved in 2005.Last previous edition approved in 2010 as B972 101.DOI:10.1520/B0942-10R15.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMS
15、tandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from Underwriters Laboratories Inc.(UL),http:/.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.2.4 crimped termination,na mechanical
16、and electricalconnection between a conductor,generally a wire,and acomponent,typically a terminal specifically made for thepurpose.The crimped termination is made by compressing(crimping)the component(crimp barrel)or tab(s)of thecomponent around the conductor using a tool specificallydesigned for the purpose.3.2.5 crimp terminal,na metal component designed to beelectrically and mechanically attached to a wire by deforminga portion of the component in a crimping operation to form anattachment to
