WG 11 - TC 89/WG 11

IEC 60695-5-1:2021 is available as IEC 60695-5-1:2021 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 60695-5-1:2021 provides guidance on the following:
a) general aspects of corrosion damage test methods;
b) methods of measurement of corrosion damage;
c) consideration of test methods;
d) relevance of corrosion damage data to hazard assessment.
This basic safety publication is primarily intended for use by technical committees in the preparation of standards in accordance with the principles laid down in IEC Guide 104 and ISO/IEC Guide 51. It is not intended for use by manufacturers or certification bodies. One of the responsibilities of a technical committee is, wherever applicable, to make use of basic safety publications in the preparation of its publications. The requirements, test methods or test conditions of this basic safety publication will not apply unless specifically referred to or included in the relevant publications. This standard is to be read in conjunction with IEC TS 60695-5-2.
This third edition cancels and replaces the second edition, published in 2002, and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) References to IEC TS 60695-5-3 (withdrawn in 2014) have been removed.
b) References to IEC 60695-1-1 are now to its replacements: IEC 60695-1-10 and IEC 60695-1-11.
c) ISO/TR 9122-1 has been revised by ISO 19706.
d) Table 1 has been updated.
e) References to ISO 11907-2 and ISO 11907-3 have been removed.
f) Terms and definitions have been updated.
g) Text in 6.4 has been updated.
h) Bibliographic references have been updated.

IEC 60695-7-2:2021 gives a brief summary of the test methods that are in common use in the assessment of the toxicity of fire effluent. It includes special observations on their relevance to real fire scenarios and gives recommendations on their use.
It advises which tests provide toxic potency data that are relevant to real fire scenarios, and which are suitable for use in fire hazard assessment and fire safety engineering.
The list of test methods is not to be considered exhaustive.
This summary cannot be used in place of published standards which are the only valid reference documents.
This basic safety publication is intended for use by technical committees in the preparation of standards in accordance with the principles laid down in IEC Guide 104 and ISO/IEC Guide 51.
One of the responsibilities of a technical committee is, wherever applicable, to make use of basic safety publications in the preparation of its publications. The requirements, test methods or test conditions of this basic safety publication will not apply unless specifically referred to or included in the relevant publications.
This second edition cancels and replaces the first edition published in 2011. This edition constitutes a technical revision.
The main changes with respect to the previous edition are listed below:
– New text in the introduction;
– New text in the scope;
– Clause 2 has been updated;
– Many terms and definitions in Clause 3 reproduced from ISO 13943 have been deleted. Other terms and definitions have been added.
– New text in Subclauses 4.3 and 4.4;
– New text in Subclause 6.1;
– References to IEC 60695-7-50 and -51 (now withdrawn) have been removed;
– Reference to DEF STAN 07-247 has been added;
– Details of ISO/TS 19021 have been added;
– Details of EN 17084 have been added;
– New text added concerning ISO/TS 19700;
– New text added concerning the IMO FTP toxicity test;
– New Subclause 7.1 has been added;
– The Annex in Edition1 has been replaced by new Clause 8;
– The bibliography has been updated.

IEC 60695-9-2:2021 presents a summary of published test methods that are used to determine the surface spread of flame of electrotechnical products or materials from which they are formed.
It represents the current state of the art of the test methods and, where available, includes special observations on their relevance and use.
The list of test methods is not to be considered exhaustive, and test methods that were not developed by the IEC are not to be considered as endorsed by the IEC unless this is specifically stated.
This summary cannot be used in place of published standards which are the only valid reference documents.
This basic safety publication is intended for use by technical committees in the preparation of standards in accordance with the principles laid down in IEC Guide 104 and
ISO/IEC Guide 51.
One of the responsibilities of a technical committee is, wherever applicable, to make use of basic safety publications in the preparation of its publications. The requirements, test methods or test conditions of this basic safety publication will not apply unless specifically referred to or included in the relevant publications.
This International Standard is to be used in conjunction with IEC 60695-1.
This second edition cancels and replaces the first edition of IEC 60695-9-2 published in 2014. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) Updated introduction
b) Updated normative references
c) Updated terms and definitions
d) New Subclauses 4.1 and 4.2
e) Reference to fire stages as defined in ISO 19706 (Table 1)
f) New sub-division of tests into the following subclauses:
4.3 Small-scale fire tests
4.4 Medium and intermediate-scale fire tests
4.5 Intermediate and large-scale fire tests for cables
4.6 Real-scale fire tests for cables
g) Updated text in parts of Clause 4
h) Addition of the following test methods:
IEC TS 60695-11-21
IEC 60684-2:2011, Clause 26
ISO 3582
ISO 9772
ISO 9773
ISO 12992
ISO 21367
i) New Clause 5 and Table 4 giving an overview of test methods
j) Deletion of all the Annexes
k) Updated bibliography

IEC 60695-6-1:2021 is available as IEC 60695-6-1:2021 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 60695-6-1:2021 gives guidance on:
a) the optical measurement of obscuration of smoke;
b) general aspects of optical smoke test methods;
c) consideration of test methods;
d) expression of smoke test data;
e) the relevance of optical smoke data to hazard assessment.
This basic safety publication focusing on safety guidance is primarily intended for use by technical committees in the preparation of safety publications in accordance with the principles laid down in IEC Guide 104 and ISO/IEC Guide 51.
One of the responsibilities of a technical committee is, wherever applicable, to make use of basic safety publications in the preparation of its publications.
This third edition cancels and replaces the second edition of IEC 60695-6-1 published in 2005 and Amendment 1:2010. It constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
- References to IEC TS 60695-6-30 (withdrawn in 2016) have been removed.
- References to IEC TS 60695-6-31 (withdrawn in 2016) have been removed.
- References to ISO 5659-2 have been inserted.
- The scope contains some additional text.
- Terms and definitions have been updated.
- Subclause 3.2 has been updated.
- Subclause 7.1 has been updated.
It has the status of a basic safety publication in accordance with IEC Guide 104 and ISO/IEC Guide 51. This International Standard is to be used in conjunction with IEC 60695-6-2.

IEC TS 60695-5-2:2021 is available as IEC TS 60695-5-2:2021 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC TS 60695-5-2:2021 gives a summary of the test methods that are used in the assessment of the corrosivity of fire effluent. It presents a brief summary of test methods in common use, either as international standards or national or industry standards. It includes special observations on their relevance, for electrotechnical products and their materials, to real fire scenarios and gives recommendations on their use.
One of the responsibilities of a technical committee is, wherever applicable, to make use of basic safety publications in the preparation of its publications. The requirements, test methods or test conditions of this publication will not apply unless specifically referred to or included in the relevant publications.
This third edition cancels and replaces the second edition published in 2002.
The main changes with respect to the previous edition are listed below:
– References to IEC TS 60695-5-3 (withdrawn in 2014) have been removed.
– ISO/TR 9122-1 has been revised by ISO 19706.
– References to ISO 11907-2 and ISO 11907-3 have been removed.
– Terms and definitions have been updated.
– Text in 5.4 has been updated.
– Text in 5.5.8 (5.7.8 in Ed. 2) has been updated.
– Text in Clause 6 (7 in Ed. 2) has been updated.
– Bibliographic references have been updated.
It has the status of a basic safety publication in accordance with IEC Guide 104 and ISO/IEC Guide 51.
This technical specification is to be read in conjunction with IEC 60695-5-1.

IEC 60695-6-2:2018 provides a summary of commonly used test methods for the assessment of smoke obscuration. It presents a brief summary of static and dynamic test methods in common use, either as international standards or national or industry standards. It includes special observations on their relevance to electrotechnical products and their materials and to fire scenarios, and gives recommendations on their use.
This basic safety publication is primarily intended for use by technical committees in the preparation of standards in accordance with the principles laid down in IEC Guide 104 and ISO/IEC Guide 51. It is not intended for use by manufacturers or certification bodies.
It has the status of a basic safety publication in accordance with IEC Guide 104 and ISO/IEC Guide 51.
This standard is to be used in conjunction with IEC 60695-6-1.
This standard cancels and replaces IEC 60695-6-2 published in 2011. This second edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) updated introduction;
b) updated normative references;
c) new text in 4.1;
d) deletion of references to IEC 60695-6-30 and -31 (withdrawn)
e) updates with respect to ISO 5659-2;
f) deletion of references to BS 6853 and CEI 20-37-3 (superseded);
g) deletion of references to ISO/TR 5924 (withdrawn);
h) updated text with respect to EN 50399;
i) updated text with respect to ISO 5660-1;
j) addition of new Subclause 7.5
k) deletion of Annex B;
l) deletion of Annex E;
m) additional bibliographic references.
Key words: Fire Hazard, Smoke Obscuration

IEC 60695-1-30:2017 provides guidance for assessing and choosing candidate materials, components or sub-assemblies for making an end product based upon preselection testing.
It describes how preselection provides comparative fire hazard test methods to evaluate the performance of a test specimen and how preselection can be used in the selection of materials, parts, components and sub-assemblies during the design stage of an end product. It further describes how standardized test methods may be used as one part in the decision making processes directed to minimize the fire hazards from electrotechnical equipment. It takes into account the desired reaction to fire properties of the end product, and the possible effects of environmental conditions on the behaviour of the end product.
This third edition cancels and replaces the second edition published in 2008. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
- Reference to IEC 60695-1-12;
- Modified Introduction;
- Clause 2: updated and additional normative references;
- Clause 3: updated and additional terms and definitions;
- Clause 4: updated text, with a requirement and normative reference to IEC 60695-1-10, IEC 60695-1-11 and IEC 60695-1-12;
- Clause 5: modified text;
- Annex A: updated references with additions and deletions;
- Annex B: Examples of materials used in attended appliances replaces the previous example of an ITE product and the Bibliographic references updated.
It has the status of a basic safety publication in accordance with IEC Guide 104 and ISO/IEC Guide 51.
This standard is to be used in conjunction with IEC 60695-1-10:2016 and IEC 60695-1-11:2014.
This basic safety publication is intended for use by technical committees in the preparation of standards in accordance with the principles laid down in IEC Guide 104 and ISO/IEC Guide 51.

IEC 60695-1-10:2016 provides general guidance with respect to fire hazard testing on how to reduce to a tolerable level the risk of fire and the potential effects of fires involving electrotechnical products. It also serves as a signpost standard to the other guidance publications in the IEC 60695 series. It does not give guidance on the use of fire-resistant compartment boundaries or on the use of detection and suppression systems for the mitigation of fire risk. It describes the relationship between fire risk and the potential effects of fire, and provides guidance to IEC product committees on the applicability of qualitative and quantitative fire tests to the fire hazard assessment of electrotechnical products. Details of the calculation of fire risk are not included in the scope of this document. It emphasises the importance of the scenario approach to fire hazard and risk assessment and discusses criteria intended to ensure the development of technically sound hazard-based fire test methods. It discusses the different types of fire tests, in particular the nature of qualitative and quantitative fire tests. It also describes the circumstances under which it is appropriate for IEC product committees to maintain or develop qualitative fire tests. This standard is intended as guidance to IEC committees, and is to be used with respect to their individual applications. This second edition cancels and replaces the first edition published in 2009. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- reference to IEC 60695-1-12;
- modified Introduction and Scope;
- updated normative references;
- updated terms and definitions;
- modified Table 1;
- addition of Table 2;
- new text in Subclauses 5.2, 5.3 and 5.4;
- mandatory text in Clause 8;
- Annex B changed to Annex A, and modified;
- new Annex B concerning common ignition sources.
This publication is to be read in conjunction with IEC 60695-1-11:2014 and IEC 60695-1-12:2015.
Key words: Fire Hazard, Fire Risk, Fire Safety Engineering

IEC 60695-8-2:2016 presents a summary of published test methods that are relevant to the determination of the heat released in fire tests on electrotechnical products or materials from which they are formed. It represents the current state of the art of the test methods and, where available, includes special observations on their relevance and use. The list of test methods is not to be considered exhaustive, and test methods that were not developed by the IEC are not to be considered as endorsed by the IEC unless this is specifically stated. Heat release data can be used as part of fire hazard assessment and in fire safety engineering, as discussed in IEC 60695-1-10, IEC 60695-1-11 and IEC 60695-1-12. This standard is to be used in conjunction with IEC 60695-8-1.
Key words: Fire Hazard, Heat Release, Fire Safety Engineering, Test Methods

IEC 60695-8-1:2016 provides guidance on the measurement and interpretation of heat release from electrotechnical products and materials from which they are constructed. Heat release data can be used as part of fire hazard assessment and in fire safety engineering, as described in IEC 60695-1-11 and IEC 60695-1-12. This third edition cancels and replaces the second edition published in 2008. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- a modified Introduction;
- reference to IEC 60695-1-12;
- updated normative references;
- revised terms and definitions;
- new text in 4.2.2, 4.2.3, 6.1 and 6.4, including several mandatory statements and
- mandatory statements in a new Subclause 6.5. This standard is to be used in conjunction with IEC 60695-8-2.
Key words: Fire Hazard, Heat Release, Fire Safety Engineering

IEC 60695-1-12:2015 is intended as a general guideline for IEC Product Committees and provides:
- an explanation of the principles and uses of fire safety engineering;
- guidance on the use of fire safety engineering in the design of electrotechnical products;
- fire safety engineering terminology and concepts;
- an indication of properties, data and tests needed for input into fire safety engineering assessments and
- informative references. This international standard is not intended to be a detailed technical design guide, but is intended to provide guidance for product committees on fire safety engineering methods and performance based test information needs for use in performance based designs and fire hazard assessments of electrotechnical materials, assemblies, products and systems.
Key words: Fire Hazard, Fire Test Method, Fire Safety Engineering
This publication is to be read in conjunction with IEC 60695-1-10:2009 and IEC 60695-1-11:2014.

IEC 60695-1-11:2014 provides guidance for assessing the fire hazard of electrotechnical products and for the resulting development of fire hazard testing as related directly to harm to people, animals or property. It outlines a hazard-based process to identify appropriate fire test methods and performance criteria for products. The principles of the methodology are to identify fire events (fire scenarios) which will be associated with the product, to establish how the measurable fire properties of the product are related to the possible occurrence and outcome of those events, and to establish test methods and performance requirements for those properties which will either result in a tolerable fire outcome or eliminate the event altogether. This second edition cancels and replaces the first edition of IEC 60695-1-11 published in 2010, and constitutes a technical revision. The main changes with respect to the previous edition are:
- updated references;
- updated terms and definitions;
- added Figure 5 - Description of range of products and circumstances of use;
- and updated Bibliography.
Key words: Fire Hazard, Fire Test Method, Assessment
This publication is to be read in conjunction with  IEC 60695-1-10:2009.

IEC 60695-9-2:2014 presents a summary of published test methods that are used to determine the surface spread of flame of electrotechnical products or materials from which they are formed. It represents the current state of the art of the test methods and, where available, includes special observations on their relevance and use. The list of test methods is not to be considered exhaustive, and test methods that were not developed by IEC TC89 are not to be considered as endorsed by IEC TC89 unless this is specifically stated. This summary cannot be used in place of published standards which are the only valid reference documents.
Key words: Fire hazard, Surface spread, Flame
This publication is to be read in conjunction with IEC 60695-9-1:2013.

IEC 60695-1-40:2013 provides guidance on the minimization of fire hazard arising from the use of electrical insulating liquids, with respect to:
- electrotechnical equipment and systems and
- people, building structures and their contents.
It is not intended for use by manufacturers or certification bodies. This first edition of IEC 60695-1-40 cancels and replaces the first edition of IEC/TS 60695-1-40 published in 2002. It constitutes a technical revision and now has the status of an International Standard. The main changes with respect to the first edition of IEC/TS 60695-1-40 are the integration of editorial and technical changes throughout the text. Key words: Fire testing, fire hazard, insulating liquids
This publication is to be read in conjunction with IEC 60695-1-10:2009.

IEC 60695-9-1:2013 provides guidance for the assessment of surface spread of flame for electrotechnical products and the materials from which they are formed. It provides an explanation of the principles of flame spread for both liquids and solids, guidance for the selection of test methods, guidance on the use and interpretation of test results, and informative references. This third edition cancels and replaces the second edition of IEC 60695-9-1 published in 2005, and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- an expanded scope;
- updated references and
- updated terms and definitions.
Keywords: Surface spread, Flame
This publication is to be read in conjunction with IEC 60695-9-2:2005.

IEC 60695-4:2012 The terms and definitions in this standard are applicable to fire tests for electrotechnical products. This basic safety publication is intended for use by technical committees in the preparation of standards in accordance with IEC Guide 104 and ISO/IEC Guide 51. One of the responsibilities of a technical committee is, wherever applicable, to make use of basic safety publications in the preparation of its publications. The requirements, test methods or test conditions of this basic safety publication will not apply unless specifically referred to or included in the relevant publications. This fourth edition of IEC 60695-4 cancels and replaces the third edition issued in 2005. It constitutes a technical revision. The main changes with respect to the previous edition are as follows:
- The terms and definitions that are not specifically electrotechnical and that are either identical or equivalent to those in ISO 13943:2008 have been deleted.
- The terms and definitions that are specifically electrotechnical and that are in ISO 13943:2008 have been included for the convenience of the user.
- Some new terms have been included.
A list of all the parts in the IEC 60695 series, under the general title Fire hazard testing, can be found on the IEC website. Keywords: Fire Hazard Testing, Terminology.

IEC 60695-7-2:2011 gives a brief summary of the test methods that are in common use in the assessment of acute toxic potency, and other toxicity tests. It includes special observations on their relevance to real fire scenarios and gives recommendations on their use. It advises which tests provide toxic potency data that are relevant to real fire scenarios, and which are suitable for use in fire hazard assessment and fire safety engineering. This first edition of IEC 60695-7-2 cancels and replaces the first edition of Technical Report IEC/TR 60695-7-2 published in 2002. It constitutes a technical revision and now has the status of an International Standard. The main changes with respect to the previous edition are listed below:
- editorial changes throughout; expanded normative references;
- revised terms and definitions;
- modifications to "Repeatability and reproducibility" data throughout;
- modifications to "Relevance of test data" throughout;
- modifications to Clause 5;
- new Table 1 and Figure 1;
- introduction of ISO test method in new Subclause 6.6;
- introduction of test method from EN 50305 in new Subclause 6.8;
- revised Annex A and new Table A.1;
- expanded Bibliography.

IEC 60695-7-3:2011 concerns laboratory tests used to measure the toxic components of the fire effluent from either electrotechnical products or materials used in electrotechnical products. It provides guidance on the use and interpretation of results from such tests. It discusses currently available approaches to toxic hazard assessment consistent with the approach of ISO TC 92 SC 3, as set out in ISO 13344, ISO 13571, ISO 16312-1, ISO 16312-2, ISO 19701, ISO 19702 and ISO 19706. It also provides guidance on the use of toxic potency data in fire hazard assessment and on principles which underlie the use of combustibility and toxicological information in fire hazard assessment. The methods described are applicable to data concerning both the incapacitating effects and the lethal effects of fire effluents. This first edition cancels and replaces the second edition of IEC/TS 60695-7-3 published in 2004. It constitutes a technical revision and now has a status of an International Standard. The main changes with respect to the previous edition are listed below:
- change of designation from a Technical Specification to an International Standard;
- the Foreword, Introduction, and Clauses 1, 2 and 3 have been updated;
- expanded in all areas to further clarify the alignment with ISO/TC 92 Fire Safety and in particular with ISO 13344, ISO 13571, ISO/IEC 13943, ISO 16312-1, ISO 16312-2, ISO 19701, ISO 19702 and ISO 19706.
This publication is to be read in conjunction with IEC 60695-7-1:2010 and IEC 60695-7-2:2002.

IEC 60695-6-2:2011 provides a summary of the test methods that are used in the assessment of smoke obscuration. It presents a brief summary of static and dynamic test methods in common use, either as international standards or national or industry standards. It includes special observations on their relevance to electrotechnical products and their materials and to fire scenarios, and it gives recommendations on their use. This standard cancels and replaces IEC/TS 60695-6-2 published in 2005. This first edition constitutes a technical revision. The main changes with respect to the previous edition are listed below:
- this publication has been re-designated as an International Standard;
- updated normative references;
- updated terms and definitions; new test method Clause 7.3.2;
- numerous editorial changes of a technical nature throughout the publication.
It has the status of a horizontal standard in accordance with IEC Guide 104 and ISO/IEC Guide 51.
This publication is to be read in conjunction with  IEC 60695-6-1:2005.

IEC 60695-7-1:2010 provides guidance on the factors which affect the toxic hazard from fires involving electrotechnical products, and provides information on the methodologies recommended by ISO TC 92 (SC 3) for estimating and reducing the toxic hazard from fires, as expressed in ISO 19706, ISO 13344 and ISO 13571. There is no single test to realistically assess toxic hazard in fires. Small-scale toxic potency tests are not capable on their own of assessing the toxic hazard in fires. Current toxicity tests attempt to measure the toxic potency of a laboratory generated fire effluent. Toxic potency should not be confused with toxic hazard. The main changes with respect to the previous edition are as follows:
- minor editorial and technical changes throughout;
- references to the ISO 9122 series have been deleted and the text throughout has been updated;
- definitions have been updated in accordance with ISO/IEC 13943:2008;
- dispersal volume is stated to be an important parameter in the assessment of toxic hazard;
- table 2 has been updated;
- figures 1 and 2 have both been updated.
This publication is to be read in conjunction with IEC 60695-7-2:2002.

Applies to capacitors and resistors with unidirectional terminations intended for use in electronic equipment.

IEC 60695-6-1:2005 Gives guidance on:
a) optical measurement of smoke obscuration;
b) general aspects of optical smoke test methods;
c) consideration of test methods;
d) expression of smoke test data;
e) relevance of optical smoke data to hazard assessment.
The main changes with respect to the previous edition are listed below:
- Modified title.
- Updated normative references.
- Expanded terms and definitions.
- Numerous editorial changes of a technical nature throughout the publication.
- A flowchart has been added for the evaluation and consideration of smoke test methods.

IEC 60695-5-1:2002 Provides guidance on the following:
a) general aspects of corrosion damage test methods;
b) methods of measurement of corrosion damage;
c) consideration of test methods;
d) relevance of corrosion damage data to hazard assessment.
The structure of this second edition remains essentially the same as the first edition with the following additions:
- Information on fire scenarios and fire models has been added along with an update on the latest advances in the analysis of the fire effluent.
- The general classification of fires from ISO TR 9122-1 has been added.
- A new clause on the general aspects of the corrosivity of fire effluent which describes the types of corrosion damage effects and the factors affecting corrosivity.
- A new clause on the principles of corrosion damage measurement has been added describing the assessment of the corrosive potential and the consideration of the corrosivity test methods.
- A new table describing a summary of corrosion test methods.
- A new flowchart detailing the evaluation and consideration of corrosion damage test methods.
- The bibliography has been expanded.

IEC TS 60695-5-2:2002 Gives a summary of the test methods that are used in the assessment of the corrosivity of fire effluent. It presents a brief summary of test methods in common use, either as international standards or national or industry standards. It includes special observations on their relevance, for electrotechnical products and their materials, to real fire scenarios and gives recommendations on their use.

IEC/TS 60695-2-30:2013 describes the apparatus, calibration procedures and basic experimental procedures for the determination of the specific optical density of smoke produced by materials exposed vertically to a radiant heat source with or without the application of a pilot flame. The test specimens are of a defined size. The determination of the optical density is carried out in a pressure-controlled chamber previously calibrated with reference materials. The test methods are only applicable to flat, solid, non-metallic test specimens, of materials used in electrotechnical products. This technical specification does not provide a classification system for the behaviour of materials. The test methods are not applicable for materials that melt and flow away from the direct impingement of heat flux. The test methods are not recommended for further development for electrotechnical products nor are they recommended as the basis for regulation or other controls on smoke release due to the limitations of the physical fire model and the test specimen geometry - see Clause 4. This second edition of IEC/TS 60695-6-30 cancels and replaces the first edition published in 1996. It constitutes a technical revision. The main changes with respect to the previous edition are as follows:
- This publication is to be re-designated as a technical specification.
- The title has been modified to align with the IEC Directives.
- The FOREWORD has been revised and updated.
- An INTRODUCTION has been added.
- The Scope has been updated.
- The normative references have been updated.
- The terms and definitions have been updated.
- Clause 4: Relevance of test data and special observations has been revised.
- Detailed editorial updates have been added throughout the document.
It has the status of a basic safety publication in accordance with IEC Guide 104 and ISO/IEC Guide 51. Keywords: Smoke obscuration, Fire Hazard.
This publication is to be read in conjunction with IEC 60695-6-31:2013.

IEC/TS 60695-6-31:2013 describes the test methods for the determination of the specific optical density of smoke produced by materials used in electrotechnical products using the apparatus described in technical specification IEC/TS 60695-6-30. Test specimens are exposed vertically to a radiant heat source with or without the application of a pilot flame in a closed chamber (i.e. without air-change). The test methods are only applicable to flat, solid, non-metallic test specimens of materials used in electrotechnical products. This technical specification does not provide a classification system for the behaviour of materials. The test methods are not applicable to materials which melt and flow away from the direct impingement of heat flux. The test methods are not recommended for further development for electrotechnical products, nor are they recommended as the basis for regulation or other controls on smoke release due to the limitations of the physical fire model and the test specimen geometry - see Clause 4. This second edition cancels and replaces the first edition published in 1999. It constitutes a technical revision. The main changes with respect to the previous edition are:
- the Foreword has been revised and updated,
- the Introduction has been updated,
- the Scope has been updated
- the Normative references have been updated,
- minor technical changes have been made throughout the document, and
- detailed editorial updates have been added throughout the document. It has the status of a basic safety publication in accordance with IEC Guide 104 and ISO/IEC Guide 51. Keywords: Fire Hazard testing, Smoke obscuration.
This publication is to be read in conjunction with IEC 60695-6-30:1996.