Fire performance of communication cables installed in buildings

IEC/TR 62222:2012 provides recommendations for the requirements and test methods to be specified for the fire performance of communication cables when installed in buildings. The recommendations relate to typical applications and installation practices for copper and optical cables in buildings. This TechnicalReport includes an assessment of the fire hazards presented by such installations, and describes fire scenarios that have been established and the appropriate cable fire performances to mitigate these hazards. ISO/IEC 14763-2 recommends installation methods which,together with this Technical Report, provide guidelines for improving safety during fire. The recommendations also take into account legislation and regulation applicable to the fire performance of cables, an assessment of known test methods and their ability to measure the recommended fire performance. Power cables are usually segregated from communication cables for electrical safety and installed differently so they have not been addressed in this Technical Report.

Tenue au feu des câbles de communication installés dans les bâtiments

La CEI/TR 62222:2012 fournit des recommandations pour les exigences et les méthodes d'essai à spécifier pour la tenue au feu des câbles de communication quand ils sont installés dans des bâtiments. Les recommandations traitent des applications classiques et des pratiques d'installation dans les bâtiments pour des câbles en cuivre et des câbles à fibres optiques. Ce Rapport technique contient une évaluation des dangers d'incendie dans ce type d'installations, et décrit des scénarios d'incendie qui ont été établis et les tenues au feu des câbles appropriées pour limiter ces risques. L'ISO/CEI 14763-2 recommande des méthodes d'installation qui, ensemble avec ce Rapport technique, fournissent des lignes directrices améliorant la sécurité en présence du feu. Les recommandations tiennent également compte de la législation et de la réglementation applicables à la tenue au feu des câbles, d'une évaluation des méthodes d'essai connues et de leur capacité à mesurer la tenue au feu recommandée. Les câbles électriques sont habituellement séparés des câbles de communication pour la sécurité électrique et installés différemment, ils ne sont donc pas abordés par le présent Rapport technique.

General Information

Status
Published
Publication Date
03-Jul-2012
Current Stage
DELPUB - Deleted Publication
Completion Date
18-Jan-2021
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IEC/TR 62222
Edition 2.0 2012-07
TECHNICAL
REPORT
RAPPORT
TECHNIQUE
Fire performance of communication cables installed in buildings
Tenue au feu des câbles de communication installés dans les bâtiments
IEC/TR 62222:2012
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC/TR 62222
Edition 2.0 2012-07
TECHNICAL
REPORT
RAPPORT
TECHNIQUE
Fire performance of communication cables installed in buildings
Tenue au feu des câbles de communication installés dans les bâtiments
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX X
ICS 33.120.20 ISBN 978-2-83220-205-0

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 – TR 62222 © IEC:2012
CONTENTS

FOREWORD ........................................................................................................................... 4

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

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

3 Terms, definitions and abbreviations ................................................................................ 9

3.1 Defined terms .......................................................................................................... 9

3.2 Abbreviations ........................................................................................................ 18

4 Typical communication cable installations ...................................................................... 19

5 Legislation and regulation ............................................................................................... 20

6 Approach to fire mitigation .............................................................................................. 21

6.1 General ................................................................................................................. 21

6.2 Compartmentation (fire compartments) .................................................................. 21

6.3 Management of fire hazard .................................................................................... 22

6.4 Cables that pass through several compartments.................................................... 22

7 Recent project for regulation – The FIPEC [6] project ..................................................... 22

8 Fire protection ................................................................................................................ 23

8.1 Traditional approach .............................................................................................. 23

8.2 Fire hazard considerations .................................................................................... 25

8.3 Fire hazards of cables ........................................................................................... 27

9 Test methods.................................................................................................................. 27

9.1 Review .................................................................................................................. 27

9.2 NFPA 262/EN 50289-4-11 ..................................................................................... 27

9.3 EN 50399 .............................................................................................................. 28

9.4 IEC 60332-3 series ................................................................................................ 28

9.5 UL 1666 ................................................................................................................ 29

9.6 UL 1685/CSA FT4 ................................................................................................. 29

9.7 Other considerations ............................................................................................. 29

9.7.1 Sample selection ....................................................................................... 29

9.7.2 Cable mounting ......................................................................................... 30

9.7.3 Conditioned environment ........................................................................... 30

9.7.4 Real scale scenario ................................................................................... 30

9.8 Test method conclusions ....................................................................................... 30

10 Fire performance requirements ....................................................................................... 30

10.1 Parameters............................................................................................................ 30

10.2 Heat ...................................................................................................................... 31

10.3 Effluent smoke ...................................................................................................... 32

10.4 Propagation ........................................................................................................... 32

10.5 Ignitability .............................................................................................................. 33

10.6 Damaging effects of fire effluents .......................................................................... 33

10.7 Flaming droplets .................................................................................................... 33

10.8 Toxicity ................................................................................................................. 33

Annex A (informative) Procedure for mounting cable – Typical communication cable

installations .......................................................................................................................... 34

Annex B (informative) Fire hazards/installations/applications/test methods for

communication cables in buildings ........................................................................................ 35

Annex C (informative) Review of test methods ..................................................................... 36

---------------------- Page: 4 ----------------------
TR 62222 © IEC:2012 – 3 –

Annex D (informative) Fire performance requirements ......................................................... 42

Bibliography .......................................................................................................................... 43

Table 1 – Abbreviations ........................................................................................................ 18

Table 2 – Typical cable installation categories ...................................................................... 20

Table 3 – Traditional ranking of fire hazards ......................................................................... 24

Table 4 – Cable fire performance requirements ..................................................................... 24

Table 5 – Test methods ........................................................................................................ 27

Table 6 – Typical communication cable materials ................................................................. 31

Table 7 – Recommended requirements for heat .................................................................... 32

Table 8 – Recommended requirements for smoke ................................................................. 32

Table B.1 – Fire hazards/installations/applications/test methods for communication

cables in buildings ................................................................................................................ 35

Table C.1 – Ignitability .......................................................................................................... 36

Table C.2 – Vertical tests (1 of 3) ......................................................................................... 37

Table C.3 – Horizontal tests for forced air systems ............................................................... 40

Table C.4 – Indirect measurement of smoke ......................................................................... 41

Table D.1 – Fire performance requirements .......................................................................... 42

Table D.2 – Single cable burn test ........................................................................................ 42

---------------------- Page: 5 ----------------------
– 4 – TR 62222 © IEC:2012
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIRE PERFORMANCE OF COMMUNICATION
CABLES INSTALLED IN BUILDINGS
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

misinterpretation by any end user.

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

the latter.

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.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

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

Publications.

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.

The main task of IEC technical committees is to prepare International Standards. However, a

technical committee may propose the publication of a technical report when it has collected

data of a different kind from that which is normally published as an International Standard, for

example "state of the art".

IEC/TR 62222, which is a technical report, has been prepared by subcommittee 46C: Wires

and symmetric cables, of IEC technical committee 46: Cables, wires, waveguides, r.f.

connectors, r.f. and microwave passive components and accessories.

This second edition cancels and replaces the first edition published in 2005. It constitutes a

technical revision.

The 2005 technical report was the first attempt in understanding the potential fire hazards

concerning new installations where large quantities of data cable are involved. Although it is

important to remember that data cables will probably not spontaneously combust and offices

are still filled with other highly flammable products, the increase of “flood wiring” should be a

building design concern. This second edition attempts to align all the installation guides found

and further improve safety with fire and its possible transmission. Projects that formed the

---------------------- Page: 6 ----------------------
TR 62222 © IEC:2012 – 5 –

overall direction of the 2005 edition have been taken into account, enabling an overall general

improvement of the document..
The text of this technical report is based on the following documents:
Enquiry draft Report on voting
46C/959/DTR 46C/962/RVC

Full information on the voting for the approval of this technical report can be found in the

report on voting indicated in the above table.

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

The committee has decided that the contents of this 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.
---------------------- Page: 7 ----------------------
– 6 – TR 62222 © IEC:2012
FIRE PERFORMANCE OF COMMUNICATION
CABLES INSTALLED IN BUILDINGS
1 Scope

This Technical Report provides recommendations for the requirements and test methods to

be specified for the fire performance of communication cables when installed in buildings.

The recommendations relate to typical applications and installation practices for copper and

optical cables in buildings. This Technical Report includes an assessment of the fire hazards

presented by such installations, and describes fire scenarios that have been established and

the appropriate cable fire performances to mitigate these hazards. ISO/IEC 14763-2

recommends installation methods which, together with this Technical Report, provide

guidelines for improving safety during fire.

The recommendations also take into account legislation and regulation applicable to the fire

performance of cables, an assessment of known test methods and their ability to measure the

recommended fire performance.

Power cables are usually segregated from communication cables for electrical safety and

installed differently so they have not been addressed in this Technical Report.
2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and

are indispensable for its application. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any
amendments) applies.

IEC 60332-1 (all parts), Tests on electric and optical cables under fire conditions – Part 1:

Test for vertical flame propagation for a single insulated wire or cable

IEC 60332-1-2, Tests on electric and optical fibre cables under fire conditions – Part 1-2: Test

for vertical flame propagation for a single insulated wire or cable – Procedure for 1 kW pre-

mixed flame

IEC 60332-1-3, Tests on electric and optical fibre cables under fire conditions – Part 1-3: Test

for vertical flame propagation for a single insulated wire or cable – Procedure for

determination of flaming droplets/particles

IEC 60332-2 (all parts), Tests on electric and optical cables under fire conditions – Part 2:

Test for vertical flame propagation for a single small insulated wire or cable

IEC 60332-2-2, Tests on electric and optical fibre cables under fire conditions – Part 2-2: Test

for vertical flame propagation for a single small insulated wire or cable – Procedure for

diffusion flame

IEC 60332-3 (all parts), Tests on electric and optical cables under fire conditions – Part 3:

Test for vertical flame spread of vertically-mounted bunched wires or cables

IEC 60332-3-24, Tests on electric and optical fibre cables under fire conditions – Part 3-24:

Test for vertical flame spread of vertically-mounted bunched wires or cables – Category C

---------------------- Page: 8 ----------------------
TR 62222 © IEC:2012 – 7 –
IEC 60695 (all parts), Fire hazard testing

IEC 60695-1-10:2009, 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 60695-5-1, Fire hazard testing – Part 5-1: Corrosion damage effects of fire effluent –

General guidance

IEC/TS 60695-5-2, Fire hazard testing – Part 5-2: Corrosion damage effects of fire effluent –

Summary and relevance of test methods

IEC 60695-6-1, Fire hazard testing – Part 6-1: Smoke obscuration – General guidance

IEC 60695-6-2, Fire hazard testing – Part 6-2: Smoke obscuration – Summary and relevance

of test methods

IEC 60695-7-1, Fire hazard testing – Part 7-1: Toxicity of fire effluent – General guidance

IEC 60695-7-2, Toxicity of fire effluent – Part 7-2: Summary and relevance of test methods

IEC 60695-7-3, Fire hazard testing – Part 7-3: Toxicity of fire effluent – Use and interpretation

of test results
IEC 60695-8-1, Fire hazard testing – Part 8-1: Heat release – General guidance

IEC/TR 60695-8-2, Fire hazard testing – Part 8-2: Heat release – Summary and relevance of

test methods

IEC 60695-9-1, Fire hazard testing – Part 9-1: Surface spread of flame – General guidance

IEC/TS 60695-9-2, Fire hazard testing – Part 9-2: Surface spread of flame – Summary and

relevance of test methods

IEC 60754 (all parts), Test on gases evolved during combustion of materials from cables

IEC 60754-1, Test on gases evolved during combustion of materials from cables – Part 1:

Determination of the halogen acid gas content

IEC 60754-2, Test on gases evolved during combustion of materials from cables – Part 2:

Determination of acidity (by pH measurement) and conductivity
IEC 60794 (all parts), Optical fibre cables

IEC 61034 (all parts), Measurement of smoke density of cables burning under defined

conditions

IEC 61034-1:2005, Measurement of smoke density of cables burning under defined conditions

– Part 1: Test apparatus

IEC 61034-2:2005, Measurement of smoke density of cables burning under defined conditions

– Part 2: Test procedure and requirements
---------------------- Page: 9 ----------------------
– 8 – TR 62222 © IEC:2012

IEC 61156 (all parts), Multicore and symmetrical pair/quad cables for digital communications

IEC 62012-1, Multicore and symmetrical pair/quad cables for digital communications to be

used in harsh environments – Part 1: Generic specification
ISO/IEC 11801, Information technology – Generic cabling for customer premises

ISO 13571, Life-threatening components of fire – Guidelines for the estimation of time

available for escape using fire data
ISO/IEC 13943:2008, Fire safety – Vocabulary

ISO/IEC 14763-2, Information technology – Implementation and operation of customer

premises cabling – Part 2: Planning and installation
ISO 9705, Fire tests – Full-scale room test for surface products
ISO 19706:2011, Guidelines for assessing the fire threat to people

EN 13501-1, Fire classification of construction products and building elements – Part 1:

Classification using test data from reaction to fire tests

EN 13823, Reaction to fire tests for building products – Building products, excluding floorings,

exposed to the thermal attack by a single burning item

EN 50174-2, Information technology – cabling installation – Part 2 Installation planning and

practises inside buildings

EN 50267-2-3, Common test methods for cables under fire conditions – Tests on gases

evolved during combustion of materials from cables – Part 2-3: Procedures – Determination of

degree of acidity of gases for cables by determination of the weighted average of pH and

conductivity

EN 50289-4-11, Communication cables – Specifications for test methods – Part 4-11:

Environmental test methods – A horizontal integrated fire test method

EN 50399, Common test methods for cables under fire conditions – Heat release and smoke

production measurement on cables during flame spread test – Test apparatus, procedures,

results
BS 7671, Requirements for electrical installations

CSA FT4, Canadian Standards Association, CSA 22.2 No. 03-01, Vertical flame test – Cables

in cable trays

CSA FT6, Canadian Standards Association, CSA 22.2 No. 03-01, Horizontal flame and smoke

test

NFPA 262, Standard method of test for flame travel and smoke of wires and cables for use in

air handling spaces (formerly UL 910)

UL 1666, Underwriters Laboratories, Inc., Test for flame propagation height of electrical and

optical fibre cables installed vertically in shafts

UL 1685, Underwriters Laboratories, Inc., Standard for vertical tray fire propagation and

smoke release test for electrical and optical fibre cables
---------------------- Page: 10 ----------------------
TR 62222 © IEC:2012 – 9 –

UL VW-1, Underwriters Laboratories, Inc., VW-1 (vertical specimen) flame test – UL 1581,

Reference standard for electrical wires, cables and flexible cords
3 Terms, definitions and abbreviations

For the purposes of this document, the terms and definitions given in ISO/IEC 13943, some of

which are reproduced below for the user’s convenience, as well as the following apply,

together with some which are based on EN 13501-1.
3.1 Defined terms
3.1.1
asphyxiant

toxicant that causes hypoxia, which can result in central nervous system depression or

cardiovascular effects
[SOURCE: ISO 13943:2008, 4.17]
3.1.2
cabling

system of telecommunication cables, cords and connecting hardware that can support the

connection of information technology equipment
3.1.3
chimney effect

upward movement of hot fire effluent caused by convection currents confined within an

essentially vertical enclosure
[SOURCE: ISO 13943:2008, 4.41]
3.1.4
combustible
capable of being ignited and burned
[SOURCE: ISO 13943:2008, 4.43]
3.1.5
combustion
exothermic reaction of a substance with an oxidizing agent

Note 1 to entry: Combustion generally emits fire effluent accompanied by flames and/or glowing.

[SOURCE: ISO 13943:2008, 4.46]
3.1.6
fire compartment

enclosed space, which may be subdivided, separated from adjoining spaces by fire barriers

Note 1 to entry: Compartments are also known as “fire compartments”.
[SOURCE: ISO 13943:2008, 4.102]
3.1.7
compartmentation

division of a premise into compartments in order to provide protection for the rest of the

premises
---------------------- Page: 11 ----------------------
– 10 – TR 62222 © IEC:2012
3.1.8
convection
transfer of heat by movement of a fluid
[SOURCE: ISO 13943:2008, 4.54]
3.1.9
contribution to fire
energy released by a product influencing the fire growth
3.1.10
corrosion damage
physical and/or chemical damage or impaired function caused by chemical action
[SOURCE: ISO 13943:2008, 4.56]
3.1.11
damaged length
maximum extent in a specified direction of damaged area
3.1.12
draught-free environment

space in which the results of experiments are not significantly affected by the local air speed

Note 1 to entry: A qualitative example sample is a space in which a wax candle flame (3.1.36) remains essentially

undisturbed. Quantitative example examples are small-scale fire tests in which a maximum air speed of 0,1m.s or

0,2 m.s is sometimes specified.
[SOURCE: ISO 13943:2008, 4.70]
3.1.13
enclosure

volume defined by bounding surfaces, which may have one or more

openings
[SOURCE: ISO 13943:2008, 4.77]
3.1.14
end use application

real application of a product in relation to all aspects that influence the behaviour of that

product under different fire situations
3.1.15
fire

process of combustion characterized by the emission of heat and fire effluent and

usually accompanied by smoke, flame, glowing or a combination thereof
3.1.16
fire attack
thermal attack by fire test burner
3.1.17
fire behaviour
change in, or maintenance
...

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