Fire hazard testing - Part 1-30: Guidance for assessing the fire hazard of electrotechnical products - Preselection testing process - General guidelines

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.

Essais relatifs aux risques du feu - Partie 1-30: Lignes directrices pour l'évaluation des risques du feu des produits électrotechniques - Processus d'essai de présélection - Lignes directrices générales

IEC 60695-1-30:2017 fournit des lignes directrices pour l’évaluation et le choix des matériaux, composants et sous-ensembles candidats en vue de l’élaboration d’un produit final à partir des essais de présélection.
Elle décrit la manière dont la présélection fournit des méthodes d’essai comparatives sur les dangers d’incendie pour évaluer la tenue au feu d’une éprouvette et la façon dont la présélection peut être utilisée dans la sélection des matériaux, des parties, des composants et des sous-ensembles pendant la phase de conception d'un produit final. De plus, elle décrit la façon dont les méthodes d’essai normalisées peuvent être utilisées en tant que partie intégrante des processus de prise de décision orientés vers une minimisation des dangers d’incendie provenant des matériels électrotechniques. Elle prend en compte la réaction souhaitée aux propriétés au feu du produit final, et les effets éventuels des conditions d’environnement sur le comportement du produit final.
Cette troisième édition annule et remplace la deuxième édition parue en 2008. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- référence à l’IEC 60695-1-12;
- Modification de l’Introduction;
- Article 2: mise à jour et ajout de références normatives;
- Article 3: mise à jour et ajout de termes et de définitions;
- Article 4: mise à jour du texte, avec une exigence et référence normative à l’IEC 60695-1-10, à l’IEC 60695-1-11 et à l’IEC 60695-1-12;
- Article 5: modification du texte;
- Annexe A: mise à jour avec des additions et des suppressions de références;
- Annexe B: Les exemples de matériaux utilisés dans les appareils qui fonctionnent sous surveillance remplacent l’exemple précédemment utilisé de produit ATI;
- Mise à jour des références bibliographiques.
Elle a le statut de publication fondamentale de sécurité, conformément au Guide IEC 104 et au Guide ISO/IEC 51.
La présente publication doit être utilisée conjointement avec l’IEC 60695-1-10:2016, et l'IEC 60695-1-11:2014
La présente publication fondamentale de sécurité est destinée à être utilisée par les comités d’études dans le cadre de l'élaboration de leurs normes conformément aux principes établis dans le Guide IEC 104 et le Guide ISO/IEC 51.
Mots clés: Risques du feu, Essais de présélection, Propriétés au feu

General Information

Status
Published
Publication Date
20-Feb-2017
Technical Committee
Current Stage
PPUB - Publication issued
Start Date
21-Feb-2017
Completion Date
21-Feb-2017
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IEC 60695-1-30
Edition 3.0 2017-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
BASIC SAFETY PUBLICATION
PUBLICATION FONDAMENTALE DE SÉCURITÉ
Fire hazard testing –
Part 1-30: Guidance for assessing the fire hazard of electrotechnical products –
Preselection testing process – General guidelines
Essais relatifs aux risques du feu –

Partie 1-30: Lignes directrices pour l’évaluation des risques du feu des produits

électrotechniques – Processus d’essai de présélection – Lignes directrices
générales
IEC 60695-1-30:2017-01(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 60695-1-30
Edition 3.0 2017-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
BASIC SAFETY PUBLICATION
PUBLICATION FONDAMENTALE DE SÉCURITÉ
Fire hazard testing –
Part 1-30: Guidance for assessing the fire hazard of electrotechnical products –
Preselection testing process – General guidelines
Essais relatifs aux risques du feu –

Partie 1-30: Lignes directrices pour l’évaluation des risques du feu des produits

électrotechniques – Processus d’essai de présélection – Lignes directrices
générales
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 13.220.40; 29.020 ISBN 978-2-8322-3882-0

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 60695-1-30:2017 © IEC 2017
CONTENTS

FOREWORD ........................................................................................................................... 3

INTRODUCTION ..................................................................................................................... 5

1 Scope .............................................................................................................................. 6

2 Normative references ...................................................................................................... 6

3 Terms and definitions ...................................................................................................... 7

4 Principles of product design considering preselection ...................................................... 7

5 Advantages and limitations of preselection ...................................................................... 8

6 Aspects of preselection relative to fire hazard assessment .............................................. 9

Annex A (informative) Examples of test methods ................................................................. 10

A.1 General ................................................................................................................. 10

A.2 Ignitability ............................................................................................................. 10

A.3 Flammability and flame spread.............................................................................. 10

A.4 Heat ...................................................................................................................... 11

A.5 Smoke .................................................................................................................. 11

A.6 Toxicity ................................................................................................................. 11

A.7 Corrosion .............................................................................................................. 11

A.8 Abnormal heat ...................................................................................................... 11

A.9 Tracking index ...................................................................................................... 11

Annex B (informative) Use of preselection tests for flammability requirements for

materials used in attended electric appliances – Illustrative example .................................... 12

Bibliography .......................................................................................................................... 14

Figure B.1 – Selection and sequence of tests for resistance to fire in attended

appliances in accordance with Figure O.3 of IEC 60335-1 [1] ................................................ 13

Table 1 – Some factors which can affect fire performance in preselection tests ...................... 8

---------------------- Page: 4 ----------------------
IEC 60695-1-30:2017 © IEC 2017 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIRE HAZARD TESTING –
Part 1-30: Guidance for assessing the fire hazard of electrotechnical
products – Preselection testing process – General guidelines
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote

international co-operation on all questions concerning standardization in the electrical and electronic fields. To

this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,

Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC

Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested

in the subject dealt with may participate in this preparatory work. International, governmental and non-

governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely

with the International Organization for Standardization (ISO) in accordance with conditions determined by

agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

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4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence

between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

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5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

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other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 60695-1-30 has been prepared by IEC technical committee 89:

Fire hazard testing.

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) Reference to IEC 60695-1-12;
b) Modified Introduction;
c) Clause 2: updated and additional normative references;
d) Clause 3: updated and additional terms and definitions;
---------------------- Page: 5 ----------------------
– 4 – IEC 60695-1-30:2017 © IEC 2017

e) Clause 4: updated text, with a requirement and normative reference to IEC 60695-1-10,

IEC 60695-1-11 and IEC 60695-1-12;
f) Clause 5: modified text;
g) Annex A: updated references with additions and deletions;

h) Annex B: Examples of materials used in attended appliances replaces the previous

example of an ITE product;
i) Bibliographic references updated.
The text of this standard is based on the following documents:
FDIS Report on voting
89/1350/FDIS 89/1355/RVD

Full information on the voting for the approval of this International Standard can be found in

the report on voting indicated in the above table.

This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

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 and IEC 60695-1-11.

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.
Part 1 consists of the following parts:

Part 1-10: Guidance for assessing the fire hazard of electrotechnical products – General

guidelines

Part 1-11: Guidance for assessing the fire hazard of electrotechnical products – Fire hazard

assessment

Part 1-12: Guidance for assessing the fire hazard of electrotechnical products – Fire safety

engineering

Part 1-20: Guidance for assessing the fire hazard of electrotechnical products – Ignitability –

General guidance

Part 1-21: Guidance for assessing the fire hazard of electrotechnical products – Ignitability –

Summary and relevance of test methods

Part 1-30: Guidance for assessing the fire hazard of electrotechnical products – Preselection

testing process – General guidelines

Part 1-40: Guidance for assessing the fire hazard of electrotechnical products – Insulating

liquids

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to

the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------------- Page: 6 ----------------------
IEC 60695-1-30:2017 © IEC 2017 – 5 –
INTRODUCTION

In the design of any electrotechnical product, the risk of fire and the potential hazards

associated with fire need to be considered. In this respect the objective of component, circuit

and equipment design as well as the choice of materials is to reduce the risk of fire to a

tolerable level even in the event of reasonably foreseeable (mis)use, malfunction or failure.

IEC 60695-1-10, IEC 60695-1-11 and IEC 60695-1-12 provide guidance on how this is to be

accomplished.

The best method for testing electrotechnical products with regard to fire hazard is to duplicate

exactly the conditions occurring in practice within a real-scale fire test. Where this is not

practicable, fire hazard testing is conducted by simulating as closely as possible, the actual

conditions of use and of the situation to which a sub-assembly, component, part or material

may be exposed in such use.

Preselection is the procedure for assessing and choosing materials, components or sub-

assemblies for parts of end products. Preselection has been used for many years to assist in

the design stage of the end product.

The information gained from properly designed small-scale tests can be used as an aid for the

preselection of appropriate materials, parts, components or sub-assemblies with regard to the

fire hazard evaluation of the final end product. As an outcome of conducting a fire hazard

assessment, an appropriate series of preselection flammability and ignition tests may enable

reduced end product testing.
---------------------- Page: 7 ----------------------
– 6 – IEC 60695-1-30:2017 © IEC 2017
FIRE HAZARD TESTING –
Part 1-30: Guidance for assessing the fire hazard of electrotechnical
products – Preselection testing process – General guidelines
1 Scope

This part of IEC 60695 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 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.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their

content constitutes requirements of this document. For dated references, only the edition

cited applies. For undated references, the latest edition of the referenced document (including

any amendments) applies.

IEC 60695-1-10, Fire hazard testing – Part 1-10: Guidance for assessing the fire hazard of

electrotechnical products – General guidelines

IEC 60695-1-11, Fire hazard testing – Part 1-11: Guidance for assessing the fire hazard of

electrotechnical products – Fire hazard assessment

IEC 60695-1-12, Fire hazard testing – Part 1-12: Guidance for assessing the fire hazard of

electrotechnical products – Fire safety engineering

IEC 60695-4:2012, Fire hazard testing – Part 4: Terminology concerning fire tests for

electrotechnical products

IEC GUIDE 104, The preparation of safety publications and the use of basic safety

publications and group safety publications
ISO/IEC Guide 51, Safety aspects – Guidelines for their inclusion in standards
ISO 13943:2008, Fire safety – Vocabulary
---------------------- Page: 8 ----------------------
IEC 60695-1-30:2017 © IEC 2017 – 7 –
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 13943:2008 and

IEC 60695-4:2012 (some of which are reproduced below), as well as the following, apply.

3.1
end product
product that is ready for use without modification
Note 1 to entry: An end product can be a component of another end product.
[SOURCE: IEC 60695-4:2012, 3.2.7]
3.2
end product fire test

fire test that is carried out on an end product and is described in a relevant specification

Note 1 to entry: End product fire tests may be small-scale, intermediate-scale, large-scale or real-scale.

[SOURCE: IEC 60695-4:2012, 3.2.8]
3.3
fire hazard

physical object or condition with a potential for an undesirable consequence from fire

[SOURCE: ISO 13943:2008, 4.112]
3.4
fire hazard assessment

evaluation of the possible causes of fire, the possibility and nature of subsequent fire growth,

and the possible consequences of fire
[SOURCE: IEC 60695-4:2012, 3.2.10]
3.5
preselection

process of assessing and choosing candidate materials, components or sub-assemblies for

making an end product
[SOURCE: IEC 60695-4:2012, 3.2.21]
4 Principles of product design considering preselection

One objective of equipment design is to choose individual materials, parts, components and

sub-assemblies that reduce the likelihood of fire.

Guidance on the fire hazard testing of electrotechnical products is given in IEC 60695-1-10.

Guidance on fire hazard assessment is given in IEC 60695-1-11. Guidance on fire safety

engineering is given in IEC 60695-1-12.

The preselection procedure, as well as end product testing, should take into account all

possible ignition sources, even those that may have an influence in the event of reasonably

foreseeable (mis)use, malfunction or failure.

The properties required by individual materials, parts, components and sub-assemblies are

determined by their function and related requirements as part of the final end product. The

---------------------- Page: 9 ----------------------
– 8 – IEC 60695-1-30:2017 © IEC 2017

selection and magnitude of these properties will be dependent upon the details of reasonably

foreseeable (mis)use and environmental exposure.

An integral element of preselection is the acquisition of relevant information regarding a

material’s characteristics. This knowledge can be acquired from an analysis of data obtained

from standardized test methods conducted on specified test specimens. Examples of tests

which may be relevant to preselection are contained in Annex A.

The preselection process should describe how standardized test methods may be used in

decision-making processes to minimize the fire hazards from electrotechnical equipment. The

preselection process shall take into account the relevant features of the end product, since

the actual performance of the material may be affected by various factors and constructional

characteristics.

The fire performance of materials, parts, components and sub-assemblies is affected by a

number of factors, some of which are listed in Table 1.

Consequently, a preselection procedure to adequately assess the expected performance of a

final end product requires test data on materials, parts, components and sub-assemblies and

should take into account all of the relevant features (for example, the environmental

conditions, association with other items, and possible ignition sources).

A decision analysis flow chart (see Figure B.1) is shown in Annex B for an illustrative example

of the use of preselection.
Table 1 – Some factors which can affect fire performance in preselection tests
Item Factor
a) Thickness and size of the test specimen
b) Shape, homogeneity and volume of the test specimen

c) Combination and interaction of materials, parts, components and sub-assemblies

d) Position and orientation of the test specimen
e) Composition of materials
f) Presence of fire-retardant covers, barriers and/or coatings

g) Effects of environmental influence and contamination, e.g. effects of temperature, ageing and ventilation

h) Effects of manufacturing processes
i) Type and power of the ignition source
j) Location of application of the ignition source
k) Time of application of the ignition source
l) Presence of any heat sinks, and heat transfer effects
5 Advantages and limitations of preselection

A preselection process that can meet the principles described in Clause 4 may present certain

advantages and limitations:

a) Preselection provides a comparative method to evaluate the performance of a test

specimen and can be of assistance in the selection of materials, parts, components and

sub-assemblies during the design stage.

b) The grading and classification obtained from a comprehensive preselection process may

be used to specify a basic minimum performance of materials and parts used in product

specifications.
---------------------- Page: 10 ----------------------
IEC 60695-1-30:2017 © IEC 2017 – 9 –

c) In general, it cannot be assumed that any direct relationship exists between the results of

a preselection test and the results of a test made on the final end product. However, a

material, part, component or sub-assembly that reacts more favourably than another when

subjected to a standardized preselection test and has a history of safe use in similar

applications, could also react more favourably when used in the design of an end product.

d) Priority is given to fire hazard assessment tests made on the final end product. However,

in certain cases preselection may be agreed upon for practical reasons as a way to

reduce the amount of end product testing. It should be noted that in this case, it is

advisable to establish an increased margin of safety in an attempt to ensure satisfactory

performance, based on the relevant features of the end product.

e) Preselection tests may result in safer products because of the use of specified test

samples and consistency in test methods and test data. Preselection tests tend to use

relatively small, discrete samples, consequently reducing the costs of testing and also

enabling a variety of ignition sources to be used, which may not be easily applied in a test

on the end product.

f) Preselection data are readily available from multiple international sources. Preselection

data can be used to examine the variation of a material’s properties with respect to a

range of parameters. Typical examples of such parameters are: source of data (test

laboratory), source of material, test orientation, colour and thickness.

Examples of ISO and IEC fire hazard test methods that may be applicable to preselection are

listed in Annex A.

If an end product test is required, it cannot be replaced by the result of a preselection test.

6 Aspects of preselection relative to fire hazard assessment

Preselection of materials, based on the results obtained by tests for reaction to abnormal heat

and reaction to fire may be used in the decision-making process related to fire hazard

assessment, when the relevant aspects discussed in Clause 4 have been considered, or if

there is a history of safe use of the material in similar applications.

Some of the factors listed in Table 1 may be reasonably covered by the preselection test itself,

others may require careful interpretation of a result with regard to evaluation of fire hazard.

When the design is based on previous known fire hazard assessment elements the tests

might be limited to the relevant preselection process or a combination of a relevant

preselection process and an end product test. When the outcome of the fire hazard

assessment is uncertain or when a new design is used it is recommended to use an end

product test to verify the likelihood of fire from an electrotechnical product.
---------------------- Page: 11 ----------------------
– 10 – IEC 60695-1-30:2017 © IEC 2017
Annex A
(informative)
Examples of test methods
A.1 General

The following IEC and ISO publications contain information on fire hazard assessment tests

which may be applicable to preselection.
A.2 Ignitability

IEC 60695-1-21, Fire hazard testing – Part 1-21: Guidance for assessing the fire hazard of

electrotechnical products – Ignitability – Summary and relevance of test methods

IEC 60695-2-13, Fire hazard testing – Part 2-13: Glowing/hot-wire based test methods –

Glow-wire ignition temperature (GWIT) test method for materials

IEC 60695-11-11, Fire hazard testing – Part 11-11: Test flames – Determination of the

characteristic heat flux for ignition from a non-contacting flame source

ISO 871, Plastics – Determination of ignition temperature using a hot-air furnace

ISO 4589 series, Plastics – Determination of burning behaviour by oxygen index
A.3 Flammability and flame spread

IEC 60695-2-12, Fire hazard testing – Part 2-12: Glowing/hot-wire based test methods –

Glow-wire flammability index (GWFI) test method for materials
IEC 60
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