IEC 60695-6-1:2005/AMD1:2010

IEC 60695-6-1 ®
Edition 2.0 2010-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
BASIC SAFETY PUBLICATION
PUBLICATION FONDAMENTALE DE SÉCURITÉ
AMENDMENT 1
AMENDEMENT 1
Fire hazard testing –
Part 6-1: Smoke obscuration – General guidance

Essais relatifs aux risques du feu –
Partie 6-1: Opacité des fumées – Lignes directrices générales

IEC 60695-6-1:2005/A1:2010
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IEC 60695-6-1 ®
Edition 2.0 2010-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
BASIC SAFETY PUBLICATION
PUBLICATION FONDAMENTALE DE SÉCURITÉ
AMENDMENT 1
AMENDEMENT 1
Fire hazard testing –
Part 6-1: Smoke obscuration – General guidance

Essais relatifs aux risques du feu –
Partie 6-1: Opacité des fumées – Lignes directrices générales

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
N
CODE PRIX
ICS 13.220.99; 29.020 ISBN 978-2-88910-939-5
– 2 – 60695-6-1 Amend. 1 © IEC:2010
FOREWORD
This amendment has been prepared by IEC technical committee 89: Fire hazard testing.
The text of this amendment is based on the following documents:
CDV Report on voting
89/905/CDV 89/946A/RVC
Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the stability date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
_____________
2 Normative references
Replace the text of this clause with the following:
The following referenced documents are indispensable for the application 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 60695-4:2005, Fire hazard testing – Part 4: Terminology concerning fire tests for
electrotechnical products
, Fire hazard testing – Part 6-2: Smoke obscuration – Summary and relevance
IEC 60695-6-2
of test methods
IEC 60695-6-30:1996, Fire hazard testing – Part 6: Guidance and test methods on the
assessment of obscuration hazard of vision caused by smoke opacity from electrotechnical
products involved in fires – Section 30: Small-scale static method – Determination of smoke
opacity – Description of the apparatus
___________
To be published.
To be published.
60695-6-1 Amend. 1 © IEC:2010 – 3 –
IEC 60695-6-31:1999, Fire hazard testing – Part 6-31: Smoke obscuration – Small-scale static
test – Materials
IEC Guide 104:1997, The preparation of safety publications and the use of basic safety
publications and group safety publications
ISO/IEC Guide 51:1999. Safety aspects – Guidelines for inclusion in standards
ISO 5659-2:2006, Plastics – Smoke generation – Part 2: Determination of optical density by a
single-chamber test
ISO 5660-2:2002, Reaction-to-fire tests – Heat release, smoke production and mass loss rate
– Part 2: Smoke production rate (dynamic measurement)
ISO 13943:2008, Fire safety – Vocabulary
ISO 19706:2007, Guidelines for assessing the fire threat to people
NOTE ISO 9122-1:1989, Toxicity testing of fire effluents – Part 1: General, has been withdrawn and replaced by
ISO 19706:2007.
ASTM E 1354:2008, Standard Test Method for Heat and Visible Smoke Release Rates for
Materials and Products Using an Oxygen Consumption Calorimeter
EN 13823:2002, Reaction to fire tests for building products – Building products, excluding
floorings, exposed to thermal attack by a single burning item
3 Terms, definitions and symbols
3.1 Terms and definitions
Replace the text of this subclause with the following:
For the purposes of this document, the terms and definitions given in ISO/IEC 13943, some of
which are reproduced below for the uses’ convenience, as well as the following apply.
3.1.1
combustion
exothermic reaction of a substance with an oxidizing agent
NOTE Combustion generally emits fire effluent accompanied by flames and/or glowing.
[ISO/IEC 13943, definition 4.46]
3.1.2
extinction area of smoke
product of the volume occupied by smoke and the extinction coefficient of the smoke
NOTE It is a measure of the amount of smoke, and the typical units are square metres (m ).
[ISO /IEC 13943, definition 4.92]
3.1.3
extinction coefficient
natural logarithm of the ratio of incident light intensity to transmitted light intensity, per unit
light path length
–1
NOTE Typical units are reciprocal metres (m ).

– 4 – 60695-6-1 Amend. 1 © IEC:2010
[ISO/IEC 13943, definition 4.93]
3.1.4
fire
〈general〉 process of combustion characterized by the emission of heat and fire effluent and
usually accompanied by smoke, flame or glowing or a combination thereof
NOTE In the English language the term "fire" is used to designate three concepts, two of which, fire (3.1.5) and
fire (3.1.6), relate to specific types of self-supporting combustion with different meanings and two of them are
designated using two different terms in both French and German.
[ISO/IEC 13943, definition 4.96]
3.1.5
fire
〈controlled〉 self-supporting combustion that has been deliberately arranged to provide useful
effects and is limited in its extent in time and space
[ISO/IEC 13943, definition 4.97]
3.1.6
fire
〈uncontrolled〉 self-supporting combustion that has not been deliberately arranged to provide
useful effects and is not limited in its extent in time and space
[ISO/IEC 13943, definition 4.98]
3.1.7
fire effluent
totality of gases and aerosols, including suspended particles, created by combustion or
pyrolysis in a fire
[ISO/IEC 13943, definition 4.105]
3.1.8
fire hazard
physical object or condition with a potential for an undesirable consequence from fire
[ISO/IEC 13943, definition 4.112]
3.1.9
fire model
fire simulation
calculation method that describes a system or process related to fire development, including
fire dynamics and the effects of fire
[ISO/IEC 13943, definition 4.116]
3.1.10
fire scenario
qualitative description of the course of a fire with respect to time, identifying key events that
characterise the studied fire and differentiate it from other possible fires
NOTE It typically defines the ignition and fire growth processes, the fully developed fire stage, the fire decay
stage, and the environment and systems that impact on the course of the fire.
[ISO/IEC 13943, definition 4.129]

60695-6-1 Amend. 1 © IEC:2010 – 5 –
3.1.11
flashover
〈stage of fire〉 transition to a state of total surface involvement in a fire of combustible
materials within an enclosure
[ISO/IEC 13943, definition 4.156]
3.1.12
heat flux
amount of thermal energy emitted, transmitted or received per unit area and per unit time
–2
NOTE The typical units are watts per square metre (W·m ).
[ISO/IEC 13943, definition 4.173]
3.1.13
ignition
sustained ignition (deprecated)
〈general〉 initiation of combustion
[ISO/IEC 13943, definition 4.187]
3.1.14
ignition
sustained ignition (deprecated)
〈flaming combustion〉 initiation of sustained flame
[ISO/IEC 13943, definition 4.188]
3.1.15
large-scale fire test
fire test, that cannot be carried out in a typical laboratory chamber, performed on a test
specimen of large dimensions
NOTE A fire test performed on a test specimen of which the maximum dimension is greater than 3 m is usually
called a large-scale fire test.
[ISO/IEC 13943, definition 4.205]
3.1.16
mass optical density of smoke
optical density of smoke multiplied by a factor, V/(Δm L), where V is the volume of the test
chamber, Δm is the mass lost from the test specimen, and L is the light path length
2 -1
NOTE The typical units are square metres per gram (m ⋅g ).
[ISO/IEC 13943, definition 4.225]
3.1.17
obscuration by smoke
reduction in the intensity of light due to its passage through smoke
cf. extinction area of smoke (3.1.2) and specific extinction area of smoke (3.1.26).
NOTE 1 In practice, obscuration by smoke is usually measured as the transmittance, which is normally expressed
as a percentage.
NOTE 2 Obscuration by smoke causes a reduction in visibility.
[ISO/IEC 13943, definition 4.242]

– 6 – 60695-6-1 Amend. 1 © IEC:2010
3.1.18
opacity of smoke
ratio of incident light intensity to transmitted light intensity through smoke, under specified
conditions
cf. obscuration by smoke (3.1.17)
NOTE 1 Opacity of smoke is the reciprocal of transmittance.
NOTE 2 The opacity of smoke is dimensionless.
[ISO/IEC 13943, definition 4.243]
3.1.19
optical density of smoke
measure of the attenuation of a light beam passing through smoke expressed as the logarithm
to the base 10 of the opacity of smoke
cf. specific optical density of smoke (3.1.26)
NOTE The optical density of smoke is dimensionless.
[ISO/IEC 13943, definition 4.244]
3.1.20
real-scale fire test
fire test that simulates a given application, taking into account the real scale, the real way the
item is installed and used, and the environment
NOTE Such a fire test normally assumes that the products are used in accordance with the conditions laid down
by the specifier and/or in accordance with normal practice.
[ISO/IEC 13943, definition 4.273]
3.1.21
small-scale fire test
fire test performed on a test specimen of small dimensions
NOTE A fire test performed on a test specimen of which the maximum dimension is less than 1 m is usually called
a small-scale fire test.
[ISO/IEC 13943, definition 4.292]
3.1.22
SMOGRA
smoke growth rate parameter that
...