ASTM B913-05(2015)

Standard Test Method for Evaluation of Crimped Electrical Connections to 16-Gauge and Smaller Diameter Stranded and Solid Conductors

SIGNIFICANCE AND USE
5.1 This test method establishes the requirements for a standardized method of evaluating the performance of crimped-type electrical connections having solid or stranded conductors.  
5.2 In order to achieve a successful crimped connection, the crimping tool must deform the material of the crimp barrel or barrel tab(s) around the conductor. As a consequence, the conductor surfaces are placed under compression by the crimp terminal and areas of contact are established between the conductor and the crimp barrel. These areas provide the desired electrical connection. A reliable crimped connection is one that is capable of maintaining the contact between the conductor and crimp barrel so that a stable electrical connection is maintained when it is exposed to the conditions it was designed to endure during its useful life.  
5.3 Evaluation testing is designed to ensure that a particular design crimped connection system consisting of conductor and component and associated tooling is capable of achieving a reliable electrical and mechanical connection. After the evaluation is completed, if any change in the system parts is made, the system should be reevaluated using the same procedures.  
5.4 After completion of the evaluation test, the tensile pull strength results may be used to develop acceptance requirements to be used in inspection of subsequent production lots of crimped connections. An example of such an acceptance requirement is shown in Appendix X1.  
5.5 The aging test, 33 days exposure at 118°C, has been used in the telecommunications industry to simulate 40 years of service at a moderately elevated temperature of 50°C, an environment that components experience within large banks of telephone equipment. This environment is similar to that seen in a wide range of electronic systems operating indoors containing active components that dissipate power. The test is designed to reproduce the stress relaxation of copper alloys in such service and has been used ext...
SCOPE
1.1 This test method establishes the requirements for a standardized method of evaluating the quality of crimped-type electrical connections to solid or stranded conductors. This test method applies to 16-gauge and smaller diameter copper wire, coated or uncoated.  
1.2 This test method is applicable to connection systems intended for indoor use, or for use in environmentally protected enclosures. Additional testing may be required to assure satisfactory performance in applications where high humidity or corrosive environment, or both, may be present.  
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to become familiar with all hazards including those identified in the appropriate Safety Data Sheet (SDS) for this product/material as provided by the manufacturer, to establish appropriate safety and health practices, and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 30-Sep-2015
• ICS: 29.120.20 - Connecting devices
• Technical Committee: B02 - Nonferrous Metals and Alloys
• Drafting Committee: B02.11 - Electrical Contact Test Methods

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: B913 − 05 (Reapproved 2015)
Standard Test Method for
Evaluation of Crimped Electrical Connections to 16-Gauge
1
and Smaller Diameter Stranded and Solid Conductors
This standard is issued under the fixed designation B913; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Terminology
1.1 This test method establishes the requirements for a
3.1 Definitions—Many terms related to electrical contacts
standardized method of evaluating the quality of crimped-type
used in this test method are defined in Terminology B542.
electrical connections to solid or stranded conductors.This test
3.2 Definitions of Terms Specific to This Standard:
method applies to 16-gauge and smaller diameter copper wire,
3.2.1 crimp, v—to establish an electrical and mechanical
coated or uncoated.
attachmentbetweenthetwomembersbymechanicallydeform-
1.2 This test method is applicable to connection systems
ing one contact member around another. In most cases, one
intendedforindooruse,orforuseinenvironmentallyprotected
member is a wire or group of wires, the other is a hollow
enclosures. Additional testing may be required to assure
cylinder or partial cylinder that is deformed around the wires.
satisfactory performance in applications where high humidity
3.2.2 crimp barrel, crimp tab, n—the portion of the crimp
or corrosive environment, or both, may be present.
terminal that is deformed in the crimping operation.
1.3 The values stated in SI units are to be regarded as
3.2.3 crimped connection, n—a mechanical and electrical
standard. No other units of measurement are included in this
connection between a conductor and a component. The con-
standard.
nection is made by compressing (crimping) the component
1.4 This standard does not purport to address all of the
(crimp barrel) or tab(s) of the component about the conductor
safety concerns, if any, associated with its use. It is the
using a tool specifically designed for the purpose
responsibility of the user of this standard to become familiar
with all hazards including those identified in the appropriate
3.2.4 crimp terminal, n—an electrical component designed
Safety Data Sheet (SDS) for this product/material as provided to be electrically and mechanically attached to a wire by
by the manufacturer, to establish appropriate safety and health
deforming a portion of the component in a crimping operation
practices, and determine the applicability of regulatory limi-
toformanattachmenttothewire.Theotherendoftheterminal
tations prior to use.
usually has a ring, fork, spade, tab, or related configuration
designed to attach to another connection such as a screw or
2. Referenced Documents
terminal block.
2
2.1 ASTM Standards:
B8 Specification for Concentric-Lay-Stranded Copper 4. Summary of Test Method
Conductors, Hard, Medium-Hard, or Soft
4.1 A test lot of test specimens of the crimp terminal
B258 Specification for Nominal Diameters and Cross-
crimpedtoashortlengthofwireisprepared.Thewireispulled
SectionalAreasofAWGSizesofSolidRoundWiresUsed
from a group of the specimens in a tensile pull and the force
as Electrical Conductors
compared to set requirements based on wire diameter. A
B542 Terminology Relating to Electrical Contacts and Their
separate group of specimens is subjected to an electrical test
Use
where resistance stability of the specimen is evaluated during
deflectionofthewireattheexitofthecrimpedconnection.The
1
This test method is under the jurisdiction of ASTM Committee B02 on
group is then aged for 33 days at 118°C and periodically
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
retested in the electrical test. The electrical test results are
B02.11 on Electrical Contact Test Methods.
compared to a standard value based on wire diameter.Atest lot
Current edition approved Oct. 1, 2015. Published October 2015. Originally
passes the evaluation if it passes both the mechanical pull test
approved in 2000. Last previous edition approved in 2010 as B913 – 05 (2010).
DOI: 10.1520/B0913-05R15.
and the electrical test. In Method B, additional pull tests are
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
performed on subgroups of parts during and after the aging test
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
to provide information on progressive degradation in perfor-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. mance.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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This 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. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: B913 − 05 (Reapproved 2010) B913 − 05 (Reapproved 2015)
Standard Test Method for
Evaluation of Crimped Electrical Connections to 16-Gauge
1
and Smaller Diameter Stranded and Solid Conductors
This standard is issued under the fixed designation B913; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This test method establishes the requirements for a standardized method of evaluating the quality of crimped-type electrical
connections to solid or stranded conductors. This test method applies to 16-gauge and smaller diameter copper wire, coated or
uncoated.
1.2 This test method is applicable to connection systems intended for indoor use, or for use in environmentally protected
enclosures. Additional testing may be required to assure satisfactory performance in applications where high humidity or corrosive
environment, or both, may be present.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to become familiar with all hazards including those identified in the appropriate Material Safety Data
Sheet (MSDS)(SDS) for this product/material as provided by the manufacturer, to establish appropriate safety and health practices,
and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
B8 Specification for Concentric-Lay-Stranded Copper Conductors, Hard, Medium-Hard, or Soft
B258 Specification for Nominal Diameters and Cross-Sectional Areas of AWG Sizes of Solid Round Wires Used as Electrical
Conductors
B542 Terminology Relating to Electrical Contacts and Their Use
3. Terminology
3.1 Definitions—Many terms related to electrical contacts used in this test method are defined in Terminology B542.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 crimp, v—to establish an electrical and mechanical attachment between the two members by mechanically deforming one
contact member around another. In most cases, one member is a wire or group of wires, the other is a hollow cylinder or partial
cylinder that is deformed around the wires.
3.2.2 crimp barrel, crimp tab, n—the portion of the crimp terminal that is deformed in the crimping operation.
3.2.3 crimped connection, n—a mechanical and electrical connection between a conductor and a component. The connection is
made by compressing (crimping) the component (crimp barrel) or tab(s) of the component about the conductor using a tool
specifically designed for the purpose
3.2.4 crimp terminal, n—an electrical component designed to be electrically and mechanically attached to a wire by deforming
a portion of the component in a crimping operation to form an attachment to the wire. The other end of the terminal usually has
a ring, fork, spade, tab, or related configuration designed to attach to another connection such as a screw or terminal block.
1
This test method is under the jurisdiction of ASTM Committee B02 on Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee B02.11 on
Electrical Contact Test Methods.
Current edition approved Oct. 1, 2010Oct. 1, 2015. Published October 2010October 2015. Originally approved in 2000. Last previous edition approved in 20052010 as
B913 – 05.B913 – 05 (2010). DOI: 10.1520/B0913-05R10.10.1520/B0913-05R15.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’sstandard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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B913 − 05 (2015)
4. Summary of Test Method
4.1 A test lot of test specimens of the crimp terminal crimped to a short length of wire is prepared. The wire is pulled from a
group of the specimens in a tensile pull and the force compared to set requirements based on wire diameter. A separate group of
specimens is subjected to an electrical test where resistance stability of the specimen is evaluated during
...