IEC 60695-5-1:2021

IEC 60695-5-1 ®
Edition 3.0 2021-10
REDLINE VERSION
INTERNATIONAL
STANDARD
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HORIZONTAL PUBLICATION
Fire hazard testing –
Part 5-1: Corrosion damage effects of fire effluent – General guidance

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IEC 60695-5-1 ®
Edition 3.0 2021-10
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
HORIZONTAL PUBLICATION
Fire hazard testing –
Part 5-1: Corrosion damage effects of fire effluent – General guidance
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.020 ISBN 978-2-8322-4440-1

– 2 – IEC 60695-5-1:2021 RLV © IEC 2021
CONTENTS
FOREWORD . 3
INTRODUCTION . 2
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 8
4 Fire scenarios and physical fire models . 9
5 General aspects of the corrosivity of fire effluent . 13
5.1 Corrosion damage scenarios . 13
5.2 Types of corrosion damage effects . 15
5.2.1 Introduction . 15
5.2.2 Metal loss . 15
5.2.3 Moving parts becoming immobile . 15
5.2.4 Bridging of conductor circuits . 15
5.2.5 Formation of a non-conducting layer on contact surfaces. 15
5.3 Factors affecting corrosivity . 16
5.3.1 Introduction . 16
5.3.2 The nature of fire effluent . 16
5.3.3 The corrosion environment . 17
6 Principles of corrosion damage measurement . 17
6.1 Introduction . 17
6.2 Generation of the fire effluent . 17
6.2.1 General . 17
6.2.2 Selection of the test specimen to be burned . 18
6.2.3 Selection of the physical fire model . 18
6.3 Assessment of corrosive potential . 18
6.3.1 General . 18
6.3.2 Indirect assessment . 18
6.3.3 Simulated product testing . 19
6.3.4 Product testing . 19
6.4 Consideration of corrosivity test methods . 20
7 Relevance of data to hazard assessment . 21
Bibliography . 23

Figure 1 – Different stages in the development of a fire within a compartment . 13
Figure 2 – Evaluation and consideration of corrosion damage test methods . 21

Table 1 – General classification of fires (ISO/TR 9122-1) .
Table 1 – Characteristics of fire stages (from Table 1 of ISO 19706:2011) . 14
Table 2 – Summary of corrosivity test methods . 19

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIRE HAZARD TESTING –
Part 5-1: Corrosion damage effects of fire effluent –
General guidance
FOREWORD
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This redline version of the official IEC Standard allows the user to identify the changes made to
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– 4 – IEC 60695-5-1:2021 RLV © IEC 2021
International Standard IEC 60695-5-1 has been prepared by IEC technical committee 89: Fire
hazard testing.
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.
The text of this International Standard is based on the following documents:
FDIS Report on voting
89/1539/FDIS 89/1543/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement,
available at www.iec.ch/members_experts/refdocs. The main document types developed by
IEC are described in greater detail at www.iec.ch/standardsdev/publications.
It has the status of a basic safety publication in accordance with IEC Guide 104 and
ISO/IEC Guide 51.
In this standard, the following print types are used:
Arial bold: terms referred to in Clause 2
This standard is to be read in conjunction with IEC TS 60695-5-2.
A list of all parts in the IEC 60695 series, published under the general title Fire hazard testing,
can be found on the IEC website.

The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under 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.
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– 6 – IEC 60695-5-1:2021 RLV © IEC 2021
INTRODUCTION
The risk of fire should be considered in any electrical circuit. With regard to this risk, the
circuit and equipment design, the selection of components and the choice of materials should
contribute towards reducing the likelihood of fire even in the event of foreseeable abnormal
use, malfunction or failure. The practical aim should be to prevent ignition caused by electrical
malfunction but, if ignition and fire occur, to control the fire preferably within the bounds of the
enclosure of the electrotechnical product.
In the design of an 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
...