ASTM B812-18
(Test Method)Standard Test Method for Resistance to Environmental Degradation of Electrical Pressure Connections Involving Aluminum and Intended for Residential Applications
Standard Test Method for Resistance to Environmental Degradation of Electrical Pressure Connections Involving Aluminum and Intended for Residential Applications
SIGNIFICANCE AND USE
5.1 The principal underlying the test is the sensitivity of the electrical contact interface to temperature and humidity cycling that electrical pressure connection systems experience as a result of usage and installation environment. The temperature cycling may cause micromotion at the mating electrical contact surfaces which can expose fresh metal to the local ambient atmosphere. The humidity exposure is known to facilitate corrosion on freshly exposed metal surfaces. Thus, for those connection systems that do not maintain stable metal-to-metal contact surfaces under the condition of thermal cycling and humidity exposure, repeated sequences of these exposures lead to degradation of the contacting surface indicated by potential drop increase.
5.2 The test is of short duration relative to the expected life of connections in residential usage. Stability of connection resistance implies resistance to deterioration due to environmental conditions encountered in residential service. Increasing connection resistance as a result of the test exposure indicates deterioration of electrical contact interfaces. Assurance of long term reliability and safety of connection types that deteriorate requires further evaluation for specific specified environments and applications.
5.3 Use—It is recommended that this test method be used in one of two ways. First, it may be used to evaluate and report the performance of a particular connection system. For such use, it is appropriate to report the results in a summary (or tabular) format such as shown in Section 17, together with the statement “The results shown in the summary (or table) were obtained for (insert description of connection) when tested in accordance with Test Method B812. Second, it may be used as the basis for specification of acceptability of product. For this use, the minimum test time and the maximum allowable increase in potential drop must be established by the specifier. Specification of connection systems in...
SCOPE
1.1 This test method covers all residential pressure connection systems. Detailed examples of application to specific types of connection systems, set-screw neutral bus connectors and twist-on wire-splicing connectors, are provided in Appendix X1 and Appendix X2.
1.2 The purpose of this test method is to evaluate the performance of residential electrical pressure connection systems under conditions of cyclic temperature change (within rating) and high humidity.
1.3 The limitations of the test method are as follows:
1.3.1 This test method shall not be considered to confirm a specific lifetime in application environments.
1.3.2 The applicability of this test method is limited to pressure connection systems rated at or below 600 V d-c or a-c RMS.
1.3.3 This test method is limited to temperature and water vapor exposure in addition to electrical current as required to measure connection resistance.
1.3.4 This test method does not evaluate degradation which may occur in residential applications due to exposure of the electrical connection system to additional environmental constituents such as (but not limited to) the following examples:
1.3.4.1 Household chemicals (liquid or gaseous) such as ammonia, bleach, or other cleaning agents.
1.3.4.2 Chemicals as may occur due to normal hobby or professional activities such as photography, painting, sculpture, or similar activities.
1.3.4.3 Environments encountered during construction or remodeling such as direct exposure to rain, uncured wet concrete, welding or soldering fluxes and other agents.
1.3.5 This test method is limited to evaluation of pressure connection systems.
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...
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: B812 − 18
Standard Test Method for
Resistance to Environmental Degradation of Electrical
Pressure Connections Involving Aluminum and Intended for
1
Residential Applications
This standard is issued under the fixed designation B812; 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.
INTRODUCTION
Electrical pressure connection systems involving aluminum are those in which one or more of the
components of the system in the direct electrical path or carrying any electrical current is fabricated
of aluminum, including aluminum wires, aluminum bus bars, aluminum bolts, aluminum terminations,
or any other aluminum current-carrying member. Included are systems which must carry current for
safety purposes such as ground shields or straps attached to aluminum framing or other structural
members. Pressure connection systems can be evaluated by this test method. Such systems are
comprised of the wire or other structure being connected and the means of connection, any element
of which is made of aluminum.
Connection systems tested are exposed sequentially to ambients of high relative humidity and
temperature cycles of 75°C, such as may be encountered by some connections in actual residential
applications. Periodic observation of the potential drop across the connection interfaces while carrying
rated current provides a measurement of connection performance.
1. Scope 1.3.4 This test method does not evaluate degradation which
may occur in residential applications due to exposure of the
1.1 This test method covers all residential pressure connec-
electrical connection system to additional environmental con-
tion systems. Detailed examples of application to specific types
stituents such as (but not limited to) the following examples:
of connection systems, set-screw neutral bus connectors and
1.3.4.1 Household chemicals (liquid or gaseous) such as
twist-on wire-splicing connectors, are provided in Appendix
ammonia, bleach, or other cleaning agents.
X1 and Appendix X2.
1.3.4.2 Chemicals as may occur due to normal hobby or
1.2 The purpose of this test method is to evaluate the
professional activities such as photography, painting, sculpture,
performance of residential electrical pressure connection sys-
or similar activities.
tems under conditions of cyclic temperature change (within
1.3.4.3 Environments encountered during construction or
rating) and high humidity.
remodeling such as direct exposure to rain, uncured wet
1.3 The limitations of the test method are as follows:
concrete, welding or soldering fluxes and other agents.
1.3.1 This test method shall not be considered to confirm a
1.3.5 This test method is limited to evaluation of pressure
specific lifetime in application environments.
connection systems.
1.3.2 The applicability of this test method is limited to
1.4 This standard does not purport to address all of the
pressure connection systems rated at or below 600 V d-c or a-c
safety concerns, if any, associated with its use. It is the
RMS.
responsibility of the user of this standard to become familiar
1.3.3 This test method is limited to temperature and water
with all hazards including those identified in the appropriate
vapor exposure in addition to electrical current as required to
Safety Data Sheet (SDS) for this product/material as provided
measure connection resistance.
by the manufacturer, to establish appropriate safety, health,
and environmental practices, and determine the applicability
1
of regulatory limitations prior to use.
This test method is under the jurisdiction of ASTM Committee B02 on
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
1.5 This standard should be used to measure and describe
B02.05 on Precious Metals and Electrical Contact Materials and Test Methods.
the properties of materials, products, or assemblies in response
Current edition approved Nov. 1, 2018. Published December 2018. Originally
to electrical current flow under controlled laboratory condi-
approved in 1990. Last previous edition approved in 2013 as B812 – 96 (2013).
DOI: 10.1520/B0812-18. tions and should not be used to describe or appraise the fire
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
B812 − 18
hazard or fire risk of materials, products, or assemblies under 3.4 reference conductor, n—a continuo
...
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: B812 − 96 (Reapproved 2013) B812 − 18
Standard Test Method for
Resistance to Environmental Degradation of Electrical
Pressure Connections Involving Aluminum and Intended for
1
Residential Applications
This standard is issued under the fixed designation B812; 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.
INTRODUCTION
Electrical pressure connection systems involving aluminum are those in which one or more of the
components of the system in the direct electrical path or carrying any electrical current is fabricated
of aluminum, including aluminum wires, aluminum bus bars, aluminum bolts, aluminum terminations,
or any other aluminum current-carrying member. Included are systems which must carry current for
safety purposes such as ground shields or straps attached to aluminum framing or other structural
members. Pressure connection systems can be evaluated by this test method. Such systems are
comprised of the wire or other structure being connected and the means of connection, any element
of which is made of aluminum.
Connection systems tested are exposed sequentially to ambients of high relative humidity and
temperature cycles of 75°C, such as may be encountered by some connections in actual residential
applications. Periodic observation of the potential drop across the connection interfaces while carrying
rated current provides a measurement of connection performance.
1. Scope
1.1 This test method covers all residential pressure connection systems. Detailed examples of application to specific types of
connection systems, set-screw neutral bus connectors and twist-on wire-splicing connectors, are provided in Appendix X1 and
Appendix X2.
1.2 The purpose of this test method is to evaluate the performance of residential electrical pressure connection systems under
conditions of cyclic temperature change (within rating) and high humidity.
1.3 The limitations of the test method are as follows:
1.3.1 This test method shall not be considered to confirm a specific lifetime in application environments.
1.3.2 The applicability of this test method is limited to pressure connection systems rated at or below 600 V d-c or a-c RMS.
1.3.3 This test method is limited to temperature and water vapor exposure in addition to electrical current as required to measure
connection resistance.
1.3.4 This test method does not evaluate degradation which may occur in residential applications due to exposure of the
electrical connection system to additional environmental constituents such as (but not limited to) the following examples:
1.3.4.1 Household chemicals (liquid or gaseous) such as ammonia, bleach, or other cleaning agents.
1.3.4.2 Chemicals as may occur due to normal hobby or professional activities such as photography, painting, sculpture, or
similar activities.
1.3.4.3 Environments encountered during construction or remodeling such as direct exposure to rain, uncured wet concrete,
welding or soldering fluxes and other agents.
1.3.5 This test method is limited to evaluation of pressure connection systems.
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
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 Aug. 1, 2013Nov. 1, 2018. Published August 2013December 2018. Originally approved in 1990. Last previous edition approved in 20082013
as B812 – 96 (2008).(2013). DOI: 10.1520/B0812-96R13.10.1520/B0812-18.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
B812 − 18
Sheet (MSDS)(SDS) for this product/material as provided by the manufacturer, to establish appropriate safety safety, health, and
healthenvironmental practices, and determine the applicability of regulatory limitations prior to use.
1.5 This standard should be used to measure and describe the properties of materials, products, or assemblies in response to
electrical current flow unde
...
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: B812 − 18
Standard Test Method for
Resistance to Environmental Degradation of Electrical
Pressure Connections Involving Aluminum and Intended for
1
Residential Applications
This standard is issued under the fixed designation B812; 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.
INTRODUCTION
Electrical pressure connection systems involving aluminum are those in which one or more of the
components of the system in the direct electrical path or carrying any electrical current is fabricated
of aluminum, including aluminum wires, aluminum bus bars, aluminum bolts, aluminum terminations,
or any other aluminum current-carrying member. Included are systems which must carry current for
safety purposes such as ground shields or straps attached to aluminum framing or other structural
members. Pressure connection systems can be evaluated by this test method. Such systems are
comprised of the wire or other structure being connected and the means of connection, any element
of which is made of aluminum.
Connection systems tested are exposed sequentially to ambients of high relative humidity and
temperature cycles of 75°C, such as may be encountered by some connections in actual residential
applications. Periodic observation of the potential drop across the connection interfaces while carrying
rated current provides a measurement of connection performance.
1. Scope 1.3.4 This test method does not evaluate degradation which
may occur in residential applications due to exposure of the
1.1 This test method covers all residential pressure connec-
electrical connection system to additional environmental con-
tion systems. Detailed examples of application to specific types
stituents such as (but not limited to) the following examples:
of connection systems, set-screw neutral bus connectors and
1.3.4.1 Household chemicals (liquid or gaseous) such as
twist-on wire-splicing connectors, are provided in Appendix
ammonia, bleach, or other cleaning agents.
X1 and Appendix X2.
1.3.4.2 Chemicals as may occur due to normal hobby or
1.2 The purpose of this test method is to evaluate the
professional activities such as photography, painting, sculpture,
performance of residential electrical pressure connection sys-
or similar activities.
tems under conditions of cyclic temperature change (within
1.3.4.3 Environments encountered during construction or
rating) and high humidity.
remodeling such as direct exposure to rain, uncured wet
1.3 The limitations of the test method are as follows:
concrete, welding or soldering fluxes and other agents.
1.3.1 This test method shall not be considered to confirm a
1.3.5 This test method is limited to evaluation of pressure
specific lifetime in application environments.
connection systems.
1.3.2 The applicability of this test method is limited to
1.4 This standard does not purport to address all of the
pressure connection systems rated at or below 600 V d-c or a-c
safety concerns, if any, associated with its use. It is the
RMS.
responsibility of the user of this standard to become familiar
1.3.3 This test method is limited to temperature and water
with all hazards including those identified in the appropriate
vapor exposure in addition to electrical current as required to
Safety Data Sheet (SDS) for this product/material as provided
measure connection resistance.
by the manufacturer, to establish appropriate safety, health,
and environmental practices, and determine the applicability
1
of regulatory limitations prior to use.
This test method is under the jurisdiction of ASTM Committee B02 on
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
1.5 This standard should be used to measure and describe
B02.05 on Precious Metals and Electrical Contact Materials and Test Methods.
the properties of materials, products, or assemblies in response
Current edition approved Nov. 1, 2018. Published December 2018. Originally
to electrical current flow under controlled laboratory condi-
approved in 1990. Last previous edition approved in 2013 as B812 – 96 (2013).
DOI: 10.1520/B0812-18. tions and should not be used to describe or appraise the fire
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
B812 − 18
hazard or fire risk of materials, products, or assemblies under 3.4 reference conductor, n—a continuous length of the same
actual installation conditions or under actual fire conditions. conductor material (wire, cable, busbar, etc.) incorporated in
...
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