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ASTM D4565-20

(Test Method)

Standard Test Methods for Physical and Environmental Performance Properties of Insulations and Jackets for Telecommunications Wire and Cable

Standard Test Methods for Physical and Environmental Performance Properties of <brk/>Insulations and Jackets for Telecommunications Wire and Cable

SIGNIFICANCE AND USE
5.1 Dimensional measurements, properly interpreted, provide information with regard to the conductors, insulation, or jacket. The dimensional measurements provide data for research and development, engineering design, quality control, and acceptance or rejection under specifications.
SCOPE
1.1 These test methods cover procedures for the physical testing of thermoplastic insulations and jackets used on telecommunications wire and cable and the testing of physical characteristics and environmental performance properties of completed products. To determine the procedure to be used on the particular insulation or jacket or on the completed wire or cable, make reference to the specification for that product.  
1.2 These test methods appear in the following sections of this standard:    
Test Method  
Section(s)  
Dimensional Measurements of Insulations, Jackets, Miscellaneous
Cable Components, and of Completed Cable  
4 – 9  
Cross-sectional Areas  
9  
Diameters  
6  
Eccentricity  
8  
Thickness  
7  
Physical and Environmental Tests of Insulation and Jackets  
10 – 25  
Aging Test (Jackets Only)  
24  
Cold Bend (Insulation Only)  
16  
Environmental Stress Crack (Polyolefin Jackets Only)  
21  
Heat Distortion (Jackets Only)  
22  
Heat Shock (Jackets Only)  
23  
Insulation Adhesion  
19  
Insulation and Jacket Shrinkback (Oven Test)  
14  
Insulation Compression  
20  
Insulation Shrinkback (Solder Test)  
15  
Melt Flow Rate Change—Polyolefin Materials  
12  
Oil Immersion Test (Jackets Only)  
25  
Oxygen Induction Time (Polyolefin Insulation Only)  
17  
Oxygen Induction Time (Cable Filling Compound Only)  
18  
Tensile and Elongation Tests  
13  
Physical and Environmental Tests of Insulations and Jackets of
Completed Wire and Cable  
26 – 42  
Cable Torsion Test  
38  
Compound Flow Test (Filled Core Wire and Cable Only)  
42  
Corrugation Extensibility Test  
36  
Cable Impact Test  
33  
Jacket Bonding Tests  
29  
Jacket Notch Test  
32  
Jacket Peel or Pull  
28  
Jacket Slip Strength Test  
30  
Procedure  
Section(s)  
Pressure Test (Air Core Wire and Cable Only)  
40  
Sheath Adherence Test  
31  
Water Penetration Test (Filled Core Wire and Cable Only)  
41  
Wire and Cable Bending Test  
34  
Wire breaking strength  
37  
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard, except where only SI units are given.  
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 establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific warning statement see 19.1.  
1.5 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.

General Information

Status
Published
Publication Date
30-Sep-2020
ICS
29.035.01 - Insulating materials in general
Technical Committee
D09 - Electrical and Electronic Insulating Materials
Drafting Committee
D09.07 - Electrical Insulating Materials
Current Stage
Ref Project

Relations

Refers
ASTM E171/E171M-11(2020) - Standard Practice for Conditioning and Testing Flexible Barrier Packaging
Effective Date
01-May-2020

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ASTM D4565-20 - Standard Test Methods for Physical and Environmental Performance Properties of <brk/>Insulations and Jackets for Telecommunications Wire and CableASTM D4565-20 - Standard Test Methods for Physical and Environmental Performance Properties of <brk/>Insulations and Jackets for Telecommunications Wire and Cable
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Standards Content (Sample)

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: D4565 − 20
Standard Test Methods for
Physical and Environmental Performance Properties of
Insulations and Jackets for Telecommunications Wire and
1
Cable
This standard is issued under the fixed designation D4565; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
Procedure Section(s)
Pressure Test (Air Core Wire and Cable Only) 40
1.1 These test methods cover procedures for the physical
Sheath Adherence Test 31
testing of thermoplastic insulations and jackets used on tele- Water Penetration Test (Filled Core Wire and Cable Only) 41
Wire and Cable Bending Test 34
communications wire and cable and the testing of physical
Wire breaking strength 37
characteristics and environmental performance properties of
1.3 Thevaluesstatedininch-poundunitsaretoberegarded
completed products. To determine the procedure to be used on
as standard. The values given in parentheses are mathematical
the particular insulation or jacket or on the completed wire or
conversions to SI units that are provided for information only
cable, make reference to the specification for that product.
andarenotconsideredstandard,exceptwhereonlySIunitsare
1.2 These test methods appear in the following sections of
given.
this standard:
1.4 This standard does not purport to address all of the
Test Method Section(s)
safety concerns, if any, associated with its use. It is the
Dimensional Measurements of Insulations, Jackets, Miscellaneous 4–9
Cable Components, and of Completed Cable responsibility of the user of this standard to establish appro-
Cross-sectional Areas 9
priate safety, health, and environmental practices and deter-
Diameters 6
mine the applicability of regulatory limitations prior to use.
Eccentricity 8
Thickness 7 For specific warning statement see 19.1.
Physical and Environmental Tests of Insulation and Jackets 10–25
1.5 This international standard was developed in accor-
Aging Test (Jackets Only) 24
dance with internationally recognized principles on standard-
Cold Bend (Insulation Only) 16
Environmental Stress Crack (Polyolefin Jackets Only) 21
ization established in the Decision on Principles for the
Heat Distortion (Jackets Only) 22
Development of International Standards, Guides and Recom-
Heat Shock (Jackets Only) 23
mendations issued by the World Trade Organization Technical
Insulation Adhesion 19
Insulation and Jacket Shrinkback (Oven Test) 14
Barriers to Trade (TBT) Committee.
Insulation Compression 20
Insulation Shrinkback (Solder Test) 15
2. Referenced Documents
Melt Flow Rate Change—Polyolefin Materials 12
2
Oil Immersion Test (Jackets Only) 25
2.1 ASTM Standards:
Oxygen Induction Time (Polyolefin Insulation Only) 17
D471Test Method for Rubber Property—Effect of Liquids
Oxygen Induction Time (Cable Filling Compound Only) 18
Tensile and Elongation Tests 13 D638Test Method for Tensile Properties of Plastics
Physical and Environmental Tests of Insulations and Jackets of 26–42
D1238Test Method for Melt Flow Rates of Thermoplastics
Completed Wire and Cable
by Extrusion Plastometer
Cable Torsion Test 38
Compound Flow Test (Filled Core Wire and Cable Only) 42 D1248Specification for Polyethylene Plastics Extrusion
Corrugation Extensibility Test 36
Materials for Wire and Cable
Cable Impact Test 33
D1693Test Method for Environmental Stress-Cracking of
Jacket Bonding Tests 29
Jacket Notch Test 32 Ethylene Plastics
Jacket Peel or Pull 28
D2633Test Methods for Thermoplastic Insulations and
Jacket Slip Strength Test 30
Jackets for Wire and Cable
D3032Test Methods for Hookup Wire Insulation
1
These test methods are under the jurisdiction of ASTM Committee D09 on
Electrical and Electronic Insulating Materials and are the direct responsibility of
2
Subcommittee D09.07 on Electrical Insulating Materials. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Oct. 1, 2020. Published November 2020. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1986. Last previous edition approved in 2015 as D4565–15. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/D4565-20. the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D4565 − 20
D4731 Specifica
...

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: D4565 − 15 D4565 − 20
Standard Test Methods for
Physical and Environmental Performance Properties of
Insulations and Jackets for Telecommunications Wire and
1
Cable
This standard is issued under the fixed designation D4565; 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 These test methods cover procedures for the physical testing of thermoplastic insulations and jackets used on telecommuni-
cations wire and cable and the testing of physical characteristics and environmental performance properties of completed products.
To determine the procedure to be used on the particular insulation or jacket or on the completed wire or cable, make reference to
the specification for that product.
1.2 TheThese test methods appear in the following sections of this standard:
Procedure Sections
Dimensional measurements of insulations, jackets,
miscellaneous cable components, and of completed cable 4 – 9
Cross-sectional areas 9
Diameters 6
Eccentricity 8
Thickness 7
Physical and environmental tests of insulation and jackets 10 – 25
Aging test (jackets only) 24
Cold bend (insulation only) 16
Environmental stress crack (polyolefin jackets only) 21
Heat distortion (jackets only) 22
Heat shock (jackets only) 23
Insulation adhesion 19
Insulation and jacket shrinkback (oven test) 14
Insulation compression 20
Insulation shrinkback (solder test) 15
Melt flow rate change—polyolefin materials 12
Oil immersion test (jackets only) 25
Oxygen induction time (polyolefin insulation only) 17
Oxygen induction time (cable filling compound only) 18
Tensile and elongation tests 13
Physical and environmental tests of insulations and jackets of
completed wire and cable 26 – 42
Cable Torsion Test 38
Compound flow test (filled core wire and cable only) 42
Corrugation extensibility test 36
Cable impact test 33
Jacket bonding tests 29
Procedure Sections
1
These test methods are under the jurisdiction of ASTM Committee D09 on Electrical and Electronic Insulating Materials and are the direct responsibility of Subcommittee
D09.07 on Electrical Insulating Materials.
Current edition approved April 1, 2015Oct. 1, 2020. Published April 2015November 2020. Originally approved in 1986. Last previous edition approved in 20102015 as
D4565 – 10.D4565 – 15. DOI: 10.1520/D4565-15.10.1520/D4565-20.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D4565 − 20
Jacket notch test 32
Jacket peel or pull 28
Jacket slip strength test 30
Pressure test (air core wire and cable only) 40
Sheath adherance test 31
Water penetration test (filled core wire and cable only) 41
Wire and cable bending test 34
Wire breaking strength 37
Test Method Section(s)
Dimensional Measurements of Insulations, Jackets, Miscellaneous 4 – 9
Cable Components, and of Completed Cable
Cross-sectional Areas 9
Diameters 6
Eccentricity 8
Thickness 7
Physical and Environmental Tests of Insulation and Jackets 10 – 25
Aging Test (Jackets Only) 24
Cold Bend (Insulation Only) 16
Environmental Stress Crack (Polyolefin Jackets Only) 21
Heat Distortion (Jackets Only) 22
Heat Shock (Jackets Only) 23
Insulation Adhesion 19
Insulation and Jacket Shrinkback (Oven Test) 14
Insulation Compression 20
Insulation Shrinkback (Solder Test) 15
Melt Flow Rate Change—Polyolefin Materials 12
Oil Immersion Test (Jackets Only) 25
Oxygen Induction Time (Polyolefin Insulation Only) 17
Oxygen Induction Time (Cable Filling Compound Only) 18
Tensile and Elongation Tests 13
Physical and Environmental Tests of Insulations and Jackets of 26 – 42
Completed Wire and Cable
Cable Torsion Test 38
Compound Flow Test (Filled Core Wire and Cable Only) 42
Corrugation Extensibility Test 36
Cable Impact Test 33
Jacket Bonding Tests 29
Jacket Notch Test 32
Jacket Peel or Pull 28
Jacket Slip Strength Test 30
Procedure Section(s)
Pressure Test (Air Core Wire and Cable Only) 40
Sheath Adherence Test 31
Water Penetration Test (Filled Core Wire and Cable Only) 41
Wire and Cable Bending Test 34
Wire breaking strength 37
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are
...

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1.5 Data describing the burning behavior from ignition to the end of the test are obtained.  
1.6 The production of light obscuring smoke is measured.  
1.7 The burning behavior is documented visually, by photographic or video recordings, or both.  
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1.7 Fire testing is inherently hazardous. Adequate safeguards for personnel and property shall be employed in conducting these tests.
Note 1: Although this test method and IEC 60695-2-12 differ in approach and in detail, data obtained to determine the glow-wire flammability index (GWFI) using either test method are technically similar. Although this test method and IEC 60695-2-13 differ in approach and in detail, data obtained to determine the glow-wire ignition temperature (GWIT) using either test method are technically similar.  
1.8 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.

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ASTM
ASTM D5374-22a(Test Method)
Standard Test Methods for Forced-Convection Laboratory Ovens for Evaluation of Electrical Insulation

SIGNIFICANCE AND USE
4.1 Ovens used for thermal evaluation of insulating materials are to be capable of maintaining uniform conditions of temperature and air circulation over the extended periods of time that are required for conducting these tests. Specification D5423 specifies the permissible variations from absolute uniformity that have been accepted internationally for these ovens. These test methods include procedures for measuring these variations and other specified characteristics of the ovens.
SCOPE
1.1 These test methods cover procedures for evaluating the characteristics of forced-convection ventilated electrically-heated ovens, operating over all or part of the temperature range from 20 °C above the ambient temperature to 500 °C and used for thermal endurance evaluation of electrical insulating materials.  
1.2 These test methods are based on IEC Publication 60216-4-1, and are technically identical to it. This compilation of test methods and an associated specification, D5423, have replaced Specification D2436.  
1.3 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 establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 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.

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ASTM
ASTM D1711-22(Terminology)
Standard Terminology Relating to Electrical Insulation

SCOPE
1.1 This terminology standard is a compilation of technical terms associated with testing and specifying solid electrical and electronic insulating materials.  
1.2 This terminology standard shall contain all definitions that are balloted specifically through Subcommittee D09.94 and through D09 main committee and that are of general interest to standards associated with electrical and electronic insulating materials. Those definitions shall be of importance to electrical and electronic insulating materials issues but need not be directly associated with a specific standard under the jurisdiction of Committee D09 on Electrical and Electronic Insulating Materials.  
1.3 It is intended that all definitions in this terminology standard originating in a specific standard under the jurisdiction of Committee D09 be identical to definitions of the same terms as printed in standards of originating technical subcommittees, with the exceptions of: (1) deletion of any part of the Discussion included in another standard that refers specifically to the use of a term in that standard; (2) figure numbers and corresponding references; and (3) in this terminology standard, a parenthetical addition of a reference to one or more technical standards in which the term is used and the year in which the term was added to this compilation.  
1.3.1 Definitions contained in this terminology standard which did not originate in a specific standard under the jurisdiction of Committee D09, or which originated in a standard that has since been revised or withdrawn, and that have been appropriately balloted, shall also be included in this terminology standard.  
1.4 It is permissible to include symbols as part of the representation of terms, where appropriate.  
1.5 It is not intended that this terminology standard include symbols (except as noted in 1.4). It is also permissible to include acronyms and abbreviations referring directly to defined terms.  
1.6 Revisions and additions to those definitions in this terminology standard which originate in a specific standard under the jurisdiction of Committee D09 are to be made as a product of a collaborative effort between Subcommittee D09.94 and the corresponding technical subcommittee of Committee D09, with Subcommittee D09.94 providing editorial advice to the technical subcommittees.  
1.7 Each definition in this terminology standard shall be accompanied by the year in which it was first incorporated into the standard, placed at the end in parentheses. All discussions shall also carry a date; it is possible that the discussion date is different from the definition date.  
1.8 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.

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ASTM
ASTM D4063-99(2022)(Specification)
Standard Specification for Pressboard for Electrical Insulating Purposes

ABSTRACT
This specification covers pressboard for electrical insulating purposes as well as for dielectrical or structural purposes in transformers and other electrical apparatus. Pressboards under this specification are of three types: Type 1 consists of high-purity (Grade 1.1) calendered pressboards, while Type 2 consists of normal-purity (Grades 2.1.1, 2.2.1, 2.3.1, and 2.3.2) calendered pressboards. Precompressed pressboards (Grades 3.1.1, 3.2.1, and 3.3) fall under Type 3. Not included in this specification, however, are pressboards comprised of two or more sheets laminated together using an adhesive. Pressboards shall be manufactured from unbleached kraft pulp, cotton pulp, or a combination of both, and shall conform to the thickness, density, surface texture (smooth calendered surface for Types1 and 2, and fine-textured finish for Type 3), and color (from tan to blue-gray, depending on the pressboard's grade) requirements specified. The pressboard must also be free of dirt, metal particles, and other foreign material. Tests for apparent density, thickness, moisture and ash content, aqueous extract conductivity, chloride content, tensile strength, pH of aqueous extract, dielectric strength in air and in oil, shrinkage, and compressibility shall be performed and shall conform to the requirements specified.
SCOPE
1.1 This specification covers pressboard for electrical insulating purposes, manufactured from kraft, cotton, or kraft and cotton pulps. This board is intended for dielectrical or structural purposes in transformers and other electrical apparatus.  
1.2 Electrical insulating boards are most commonly referred to (and will be referred to herein) as pressboard. Other terms used for pressboard include transformer board, fuller board, and presspan.  
1.3 This specification covers pressboard having a nominal thickness of 0.030 to 0.315 in. (0.8 to 8.0 mm). For thinner material refer to Specification D1305.  
1.4 The maximum thickness available will differ with the type and the manufacturer. The maximum sheet size will differ with the thickness, type, and manufacturer.  
1.5 Pressboard shall normally be plied wet without pasting. Unless specified by the purchaser, this specification does not include pressboard comprised of two or more sheets that have been laminated together using an adhesive.
Note 1: The materials described in this specification are similar to corresponding types of pressboard described in IEC Specification 641-3, Sheet 1, Types B.0.1, B.2.1, B.2.3, B.3.1, and B.3.3.  
1.6 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.7 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.

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ASTM
ASTM D3394-16(2022)(Test Method)
Standard Test Methods for Sampling and Testing Electrical Insulating Board

SIGNIFICANCE AND USE
19.1 Apparent density affects the dielectric and physical characteristics of insulating board and is a factor in the economics of its use in apparatus. This test is useful for specification, design, and quality control purposes.
SCOPE
1.1 These test methods cover the sampling and testing of electrical insulating boards. These boards are porous, usually fibrous sheets used for dielectric and structural purposes in electrical apparatus.  
1.2 These test methods are not intended for testing vulcanized fibre or molded laminated sheets.  
1.3 These test methods are applicable to board materials having a nominal thickness of at least 0.030 in. (0.76 mm).  
Note 1: For materials thinner than 0.030 in. (0.76 mm) see Test Methods D202.  
1.4 The test methods appear in the following sections:    
Sections  
ASTM Method
Reference  
Apparent Density  
18 – 23  
Aqueous Extract Characteristics  
36 – 42  
D202  
Ash Content  
43 – 46  
T 413  
Compatibility with Dielectric
Liquids  
47 – 52  
D664, D877, D924,
D971, D974, D1169,
D1500, D1816,
D3455, D3487  
Compressibility  
79 – 85  
Conditioning  
11  
D685  
Degree of Polymerization  
86 – 89  
D4243  
Dielectric Strength in Air  
53 – 59  
D149  
Dielectric Strength in Oil  
60 – 65  
D149, D2413, D3426  
Dimensions of Sheets  
12 – 17  
Moisture Content  
31 – 35  
D644  
Oil Absorption  
72 – 78  
Reports  
10  
Sampling  
6 – 9  
D3636  
Shrinkage  
24 – 30  
D644  
Tensile Properties  
66 – 71  
D202  
1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.6 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 consult and establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.7 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.

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ASTM
ASTM D2275-22(Test Method)
Standard Test Method for Voltage Endurance of Solid Electrical Insulating Materials Subjected to Partial Discharges (Corona) on the Surface

SIGNIFICANCE AND USE
5.1 This test method is useful in research and quality control for evaluating insulating materials and systems since they provide for the measurement of the endurance used to compare different materials to the action of corona on the external surfaces. A poor result on this test does not indicate that the material is a poor selection for use at high voltage or at high voltage stress in the absence of surface corona; surface corona is not the same as corona that occurs in internal cavities. (See Test Methods D3382.)  
5.2 This test method is also useful for comparison between materials of the same relative thickness. When agreed upon between the buyer and the seller, it is acceptable to express any differences in terms of relative time to failure or the magnitude of voltage stress (kV/mm or kV/in.) required to produce failure in a specified number of hours.  
5.3 It is possible for this test method to also be used to examine the effects of different processing parameters on the same insulating material, such as residual strains produced by quenching, high levels of crystallinity or molding processes that control the concentration and sizes of gas-filled cavities.  
5.4 The data are generated in the form of a set of values of lifetimes at a voltage. The dispersion of failure times is analyzed using one of the methods below:  
5.4.1 Weibull Probability Plot.  
5.4.2 Statistically (see IEEE/IEC 62539-2007 for additional information), to yield an estimate of the central value of the distribution and its standard deviation.  
5.4.3 Truncating a test at the time of the fifth failure of a set of nine and using that time as the measure of the central tendency. Two such techniques are described in 10.2.  
5.5 This test method intensifies some of the more commonly met conditions of corona attack so that materials are able to be evaluated in a time that is relatively short compared to the life of the equipment. As with most accelerated life tests, caution is necessary in...
SCOPE
1.1 This test method determines the voltage endurance of solid electrical insulating materials for use at commercial power frequencies under the action of corona (see Note 1). This test method is more meaningful for rating materials with respect to their resistance to prolonged ac stress under corona conditions for comparative evaluation between materials.
Note 1: The term “corona” is used almost exclusively in this test method instead of “partial discharge,” because it is a visible glow at the edge of the electrode interface that is the result of partial discharge. Corona, as defined in Terminology D1711, is “visible partial discharges in gases adjacent to a conductor.”  
1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard.  
1.3 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 establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, see Section 7.  
1.4 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.

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