SIST EN 50264-1:2008
Railway applications - Railway rolling stock power and control cables having special fire performance -- Part 1: General requirements
Railway applications - Railway rolling stock power and control cables having special fire performance -- Part 1: General requirements
EN 50264-1 specifies the general requirements applicable to the cables given in all other parts of EN 50264. It includes the detailed requirements for the insulating and sheathing materials and other components called up in the separate parts. In particular EN 50264-1 specifies those requirements relating to fire safety. Based on proven experience and reliability over many years these cables are rated for occasional thermal stresses causing ageing equivalent to continuous operational life at a conductor temperature of 90 °C.
Bahnanwendungen - Starkstrom- und Steuerleitungen für Schienenfahrzeuge mit verbessertem Verhalten im Brandfall -- Teil 1: Allgemeine Anforderungen
EN 50264-1 legt die allgemeinen Anforderungen für Leitungen nach allen anderen Teilen von EN 50264 fest. Er enthält die detaillierten Anforderungen an die Isolier- und Mantelmaterialien und anderen Komponenten, die in den einzelnen Teilen angesprochen werden. Insbesondere legt EN 50264-1 die Anforderungen fest, die sich auf die Brandsicherheit beziehen. Aufgrund guter Erfahrung und Zuverlässigkeit über viele Jahre sind diese Leitungen für gelegentliche thermische Beanspruchung ausgelegt, die zu einer Alterung führen, die einem kontinuierlichen Betriebszustand bei 90 °C entsprechen. ANMERKUNG Die Bemessung basiert auf den Polymeren, die in 3.1 und 3.2 definiert sind. Bevor diese Polymere breite Anerkennung in der Kabelindustrie gewonnen hatten, wurden die Alterungseigenschaften durch thermische Langzeituntersuchungen ermittelt und unter Verwendung von Techniken, die denen in EN 60216 (Reihe) entsprechen, auf 20 000 h extrapoliert. Darauf basierende Erfahrungen im Betrieb haben gezeigt, dass die vorausgesagten Verhaltensstufen korrekt waren. Werden extrapolierte Daten verwendet, um die Lebensdauer im Betrieb vorherzusagen, sollten sie mit dem Hersteller der Leitung abgestimmt werden und sollten auf einer für den Werkstofftyp der Leitung geeigneten Fehlerart basieren. Die maximale Kurzschlusstemperatur am Leiter beträgt 200 °C bei 5 s Dauer. Dieser Teil 1 ist in Verbindung mit den anderen Teilen von EN 50264 anzuwenden.
Applications ferroviaires - Câbles de puissance et de contrôle à comportement au feu spécifié pour matériel roulant ferroviaire -- Partie 1: Prescriptions générales
La EN 50264-1 spécifie les prescriptions générales applicables aux câbles faisant l’objet de toutes les autres parties de la EN 50264. Elle comporte les prescriptions détaillées pour les matériaux d’isolation et de gainage ainsi que celles des autres composants cités dans les autres parties. En particulier la EN 50264-1 spécifie les prescriptions relatives au comportement au feu. Basés sur une expérience éprouvée, et fiable de plusieurs années, ces câbles sont définis pour des contraintes thermiques occasionnelles entraînant un vieillissement équivalant à celui d’un régime permanent à la température de 90 °C au niveau de l’âme. NOTE Cette définition est basée sur les polymères définis en 3.1 et 3.2. Avant que ces polymères ne soient acceptés dans l’industrie du câble, des performances de vieillissement ont été évaluées au travers d’essais thermiques de longue durée et ont été extrapolés à 20 000 h en utilisant les techniques de la série EN 60216. Les expériences en service ont démontré que les niveaux de performances prédits sont corrects. Lorsque l’extrapolation des résultats est utilisée pour évaluer la durée de vie en service, il est recommandé qu’elle soit confirmée par le fabricant de câbles, et qu’elle soit fondée sur le mode de défaut approprié au type de matériau ou de câble.
Železniške naprave - Energetski in krmilni kabli za železniška vozna sredstva, ki imajo posebne ognjevarne lastnosti - 1. del: Splošne zahteve
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 50264-1:2008
01-september-2008
1DGRPHãþD
SIST EN 50264-1:2003
Železniške naprave - Energetski in krmilni kabli za železniška vozna sredstva, ki
imajo posebne ognjevarne lastnosti - 1. del: Splošne zahteve
Railway applications - Railway rolling stock power and control cables having special fire
performance -- Part 1: General requirements
Bahnanwendungen - Starkstrom- und Steuerleitungen für Schienenfahrzeuge mit
verbessertem Verhalten im Brandfall -- Teil 1: Allgemeine Anforderungen
Applications ferroviaires - Câbles de puissance et de contrôle à comportement au feu
spécifié pour matériel roulant ferroviaire -- Partie 1: Prescriptions générales
Ta slovenski standard je istoveten z: EN 50264-1:2008
ICS:
13.220.20 3RåDUQD]DãþLWD Fire protection
29.060.20 Kabli Cables
45.060.01 Železniška vozila na splošno Railway rolling stock in
general
SIST EN 50264-1:2008 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 50264-1:2008
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SIST EN 50264-1:2008
EUROPEAN STANDARD
EN 50264-1
NORME EUROPÉENNE
June 2008
EUROPÄISCHE NORM
ICS 13.220.20; 29.060.20; 45.060.01 Supersedes EN 50264-1:2002
English version
Railway applications -
Railway rolling stock power and control cables
having special fire performance -
Part 1: General requirements
Applications ferroviaires - Bahnanwendungen -
Câbles de puissance et de contrôle Starkstrom- und Steuerleitungen
à comportement au feu spécifié für Schienenfahrzeuge
pour matériel roulant ferroviaire - mit verbessertem Verhalten im Brandfall -
Partie 1: Prescriptions générales Teil 1: Allgemeine Anforderungen
This European Standard was approved by CENELEC on 2008-03-01. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50264-1:2008 E
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EN 50264-1:2008 – 2 –
Foreword
This European Standard was prepared by Working Group 12, Railway cables, of the Technical Committee
CENELEC TC 20, Electric cables, as part of the overall programme of work in the Technical Committee
CENELEC TC 9X, Electrical and electronic applications for railways.
The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50264-1 on
2008-03-01.
This European Standard supersedes EN 50264-1:2002.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
(dop) 2009-03-01
national standard or by endorsement
– latest date by which the national standards conflicting
(dow) 2011-03-01
with the EN have to be withdrawn
__________
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Contents
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Definitions . 6
4 Rated voltage . 7
5 Marking . 8
5.1 Indication of origin . 8
5.2 Code designation . 8
5.3 Continuity of marks. 8
5.4 Durability . 9
5.5 Legibility . 9
5.6 Use of the name CENELEC . 9
6 General requirements for the construction of cables . 9
6.1 Conductors . 9
6.2 Insulation system. 10
6.3 Fillers, tapes and inner coverings . 11
6.4 Metallic screen . 11
6.5 Sheath . 12
6.6 Overall diameter . 13
7 Electrical performance . 13
8 Reaction to fire – Cables . 13
8.1 Flame propagation (flame spread) – Single vertical cable . 13
8.2 Flame propagation (flame spread) – Bunched cables . 13
8.3 Smoke emission . 13
9 Reaction to fire – Components . 14
9.1 Assessment of halogens . 14
9.2 Toxicity . 14
Annex A (normative) Requirements for halogens . 25
Annex B (normative) Determination of halogens – Elemental test . 27
Annex C (normative) Preparation of test pieces for physical tests . 29
Annex D (normative) Thickness and overall diameter – Selection of samples and calculation of results . 30
Annex E (informative) Guidance on selection of cables for type approval . 32
Bibliography . 33
Figures
Figure 1 – Example of marking . 9
Tables
Table 1 – Rated voltages . 8
Table 2a – Requirements for the tests for halogen free insulating compounds for Part 2-1 and Part 2-2 . 15
Table 2b – Requirements for the tests for halogen free insulating compounds for Part 3-1 and Part 3-2 . 18
Table 3 – Requirements for the tests for fillers, tapes and binders . 21
Table 4 – Requirements for the tests for halogen free sheathing compounds. 22
Table A.1 – Type test . 25
Table A.2 – Sample test . 25
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Introduction
The railway industry is generally concerned with the movement of people as well as goods. It is therefore
essential that a high level of safety is achieved, even when failures occur which may involve fire, howsoever
caused, affecting railway rolling stock.
Hence it is necessary to provide cables for use in railway environments which minimise the hazard to people
when a fire may damage the cable, irrespective of whether the fire is caused by an external source or from
within the electrical system.
The EN 50264 series specifies cables for power, control and associated circuits which, in the event of fire,
will limit the risk to people and improve the safety on railways in general. It covers sheathed and unsheathed
cables with insulation and sheath based on halogen free materials, for use in railway rolling stock. In the
event of a fire affecting cables to EN 50264 they will have a limited flame spread and limited emission of
toxic gases. In addition these cables when burnt, produce limited amounts of smoke. This last characteristic
will minimise loss of visibility in the event of a fire and will aid reduced evacuation times.
The objects of this standard are
– to standardise cables that are safe and reliable when properly used,
– to state the characteristics, performance, and construction requirements directly or indirectly bearing on
safety,
– to specify methods for checking conformity with these requirements.
EN 50264, which covers a range of cables rated at up to 3,6/6 kV with conductor sizes 1,0 mm² up to
400 mm², is divided into 5 parts under the generic title “Railway applications - Railway rolling stock power
and control cables having special fire performance”.
– Part 1 General requirements;
– Part 2-1 Cables with crosslinked elastomeric insulation – Single core cables;
– Part 2-2 Cables with crosslinked elastomeric insulation – Multicore cables;
– Part 3-1 Cables with crosslinked elastomeric insulation with reduced dimensions – Single core
cables;
– Part 3-2 Cables with crosslinked elastomeric insulation with reduced dimensions – Multicore cables.
These cables are intended for a limited number of applications. Further information on these applications is
given in the guide to use, i.e. EN 50355.
Information regarding selection and installation of cables, including current ratings can be found in EN 50355
and EN 50343. The procedure for selection of cable cross-sectional area, including reduction factors for
ambient temperature and installation type, is described in EN 50343.
Special test methods referred to in EN 50264 are given in EN 50305.
A separate European Standard, EN 50306 (series), covers cables for similar applications but with thinner
wall thickness of both insulation and sheath, leading to reduced overall cable diameters. These cables are
restricted to 300 V rating and a maximum conductor size of 2,5 mm². A separate European Standard,
EN 50382 (series), covers high temperature cables. The range of cables covered is rated at up to 3,6/6 kV
with conductor sizes 1,5 mm² to 400 mm².
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1 Scope
EN 50264-1 specifies the general requirements applicable to the cables given in all other parts of EN 50264.
It includes the detailed requirements for the insulating and sheathing materials and other components called
up in the separate parts. In particular EN 50264-1 specifies those requirements relating to fire safety.
Based on proven experience and reliability over many years these cables are rated for occasional thermal
stresses causing ageing equivalent to continuous operational life at a conductor temperature of 90 °C.
NOTE This rating is based upon the polymers defined in 3.1 and 3.2. Before these polymers had gained widespread acceptance in the
cable industry, ageing performance had been assessed via long-term thermal endurance testing and had been extrapolated to 20 000 h
using techniques equivalent to those in EN 60216 (series). Subsequent experience in service has demonstrated that the predicted
performance levels were correct. Where extrapolated data is used to predict lifetime in service it should be confirmed with the cable
manufacturer, and should be on the basis of a failure mode appropriate to the type of material or cable.
The maximum conductor temperature for short circuit conditions is 200 °C based on a duration of 5 s.
This Part 1 should be read in conjunction with the other parts of EN 50264.
2 Normative references
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.
EN 10002-1 Metallic materials – Tensile testing – Methods of test at ambient temperature
EN 50264-2-1 Railway applications – Railway rolling stock power and control cables having
special fire performance – Part 2-1: Cables with crosslinked elastomeric insulation –
Single core cables
Railway applications - Railway rolling stock power and control cables having special
EN 50264-2-2
fire performance – Part 2-2: Cables with crosslinked elastomeric insulation –
Multicore cables
EN 50264-3-1 Railway applications - Railway rolling stock power and control cables having special
fire performance – Part 3-1: Cables with crosslinked elastomeric insulation with
reduced dimensions – Single core cables
Railway applications - Railway rolling stock power and control cables having special
EN 50264-3-2
fire performance – Part 3-2: Cables with crosslinked elastomeric insulation with
reduced dimensions – Multicore cables
EN 50266-2-4 Common test methods for cables under fire conditions – Test for vertical flame
spread of vertically-mounted bunched wires or cables – Part 2-4: Procedures –
Category C
EN 50266-2-5 Common test methods for cables under fire conditions – Test for vertical flame
spread of vertically-mounted bunched wires or cables – Part 2-5: Procedures –
Small cables – Category D
EN 50267-2-1 Common test methods for cables under fire conditions – Tests on gasses evolved
during combustion of materials from cables – Part 2-1: Procedures – Determination
of the amount of halogen acid gas
Common test methods for cables under fire conditions – Tests on gases evolved
EN 50267-2-2
during combustion of materials from cables – Part 2-2: Procedures – Determination
of degree of acidity of gases for materials by measuring pH and conductivity
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EN 50264-1:2008 – 6 –
EN 50305:2002 Railway applications – Railway rolling stock cables having special fire
performance – Test methods
EN 60228 Conductors of insulated cables (IEC 60228)
EN 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 60332-1-2)
EN 60684-2 Flexible insulating sleeving – Part 2: Methods of test (IEC 60684-2)
EN 60811-1-1:1995 Insulating and sheathing materials of electric and optical cables – Common test
methods – Part 1-1: General application – Measurement of thickness and overall
dimensions – Tests for determining the mechanical properties
(IEC 60811-1-1:1993)
EN 60811-1-2:1995 Insulating and sheathing materials of electric cables – Common test methods –
Part 1-2: General application – Thermal ageing methods
(IEC 60811-1-2:1985 + A1:1989 + corr. May 1986)
EN 60811-1-3:1995 Insulating and sheathing materials of electric and optical cables – Common test
methods – Part 1-3: General application – Methods for determining the density –
Water absorption tests – Shrinkage test (IEC 60811-1-3:1993)
EN 60811-1-4:1995 Insulating and sheathing materials of electric and optical cables – Common test
methods – Part 1-4: General application – Tests at low temperature
(IEC 60811-1-4:1985 + A1:1993 + corr. May 1986)
EN 60811-2-1:1998 Insulating and sheathing materials of electric and optical cables – Common test
methods – Part 2-1: Methods specific to elastomeric compounds – Ozone
resistance, hot set and mineral oil immersion tests (IEC 60811-2-1:1998)
EN 61034-2 Measurement of smoke density of cables burning under defined conditions –
Part 2: Procedure and requirements (IEC 61034-2)
3 Definitions
For the purposes of all parts of EN 50264, the following terms and definitions apply.
The types or combination of insulating and sheathing compounds covered in this EN are listed below.
3.1
cross-linked ethylene propylene rubber (EPR)
compound based on ethylene propylene rubber or similar (EPM or EPDM) which when cross-linked complies
with the requirements given in the particular specification
3.2
cross-linked ethylene copolymers
compound in which the characteristic constituent is a copolymer of ethylene such as EVA or other, which,
when cross-linked, complies with the requirements given in the particular specification
3.3
type of compound
category, designated by one or several characteristics, in which a compound is placed according to its
properties, as determined by specific tests
NOTE The type designation is not directly related to the composition of the compound. See also 6.2.1 and 6.6.1.
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3.4
halogen-free material
combustible material which complies with the requirements of Annex A
3.5
variation
difference between the median value after ageing and the median value without ageing, expressed as a
percentage of the latter
3.6
type tests (symbol T)
tests required to be made before supplying a type of cable covered by this standard on a general commercial
basis in order to demonstrate satisfactory performance characteristics to meet the intended application
NOTE These tests are of such a nature that, after they have been made, they need not be repeated unless changes are made in the
cable materials, design or type of manufacturing process which might change the performance characteristics
3.7
sample tests (symbol S)
tests made on samples of completed cable, or components taken from a completed cable adequate to verify
that the finished product meets the design specification
3.8
routine tests (symbol R)
tests made on all complete cable lengths to demonstrate their integrity
4 Rated voltage
The rated voltage of a cable is the reference voltage for which the cable is designed, and which serves to
define the electrical tests.
The rated voltage is expressed by the combination of the following values (in volts):
U /U(U )
o m
where
U is the r.m.s. value between any insulated conductor and earth, i.e. metal covering of the
o
cable or the surrounding medium, e.g. U = 600 V;
o
U is the r.m.s. value between any two phase-conductors of a multicore cable or of a system of
single-core cables, e.g. U = 1 000 V;
is the maximum r.m.s. value of the "highest system voltage" for which the equipment may be
U
m
used, e.g. U = 1 200 V.
m
In an alternating current system, the rated voltage of a cable shall be at least equal to the nominal voltage of
the system for which it is intended.
In a direct current system, the cables shall have a maximum voltage against earth (V ) not exceeding
o
1,5 times the rated voltage (U ) of the cable, where:
o
V is the d.c. value between any insulated conductor and earth, i.e. metal covering of the cable
o
or the surrounding medium, e.g. V = 900 V.
o
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EN 50264-1:2008 – 8 –
The rated voltage recognized for the purposes of all parts of EN 50264 shall be as given in Table 1.
NOTE In the Railway Industry it is common practice to identify cables and systems by the value of U , not the more usual normal
o
practice of U.
Table 1 – Rated voltages
Rated voltage
V
U U U V
o m o
a a a a
300 500 600 450
600 1 000 1 200 900
1 800 3 000 3 600 2 700
3 600 6 000 7 200 5 400
a
Multicore cables only.
NOTE See Guide to use, EN 50355, for further information.
5 Marking
5.1 Indication of origin
Cables shall be provided with an identification of origin consisting of the continuous marking of either
manufacturer’s name or trademark or registered identification number, by one of the following methods:
1) a printed tape within the cable;
2) printing, indenting or embossing on the outer surface of sheathed cable;
3) printing on the outer surface of single core cables;
4) printing on the insulation of at least one core.
5.2 Code designation
The code designation is specified in the particular product EN.
5.3 Continuity of marks
Each specified mark shall be regarded as continuous if the distance between the end of the mark and the
beginning of the next identical mark does not exceed
a) 550 mm if the marking is on the outer surface of the cable,
b) 275 mm if the marking is on the insulation or on a tape.
NOTE 1 A "specified mark" is any mandatory mark covered by this part of EN 50264 or by the particular requirements of Parts 2-1,
2-2, 3-1 and 3-2.
NOTE 2 An example of marking on the outer surface of the cable is given in Figure 1.
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Figure 1 – Example of marking
Conformity shall be checked by visual examination and measurement.
5.4 Durability
Printed markings shall be durable. Compliance shall be checked by the test given in EN 50305, 10.1.
5.5 Legibility
All markings shall be legible.
Printed markings shall be in contrasting colours.
5.6 Use of the name CENELEC
The name CENELEC, in full or abbreviated, shall not be marked on, or in, the cables.
6 General requirements for the construction of cables
6.1 Conductors
6.1.1 Material
The conductors shall be tin-coated annealed copper.
When tested in accordance with EN 10002-1 the minimum average elongation of the wires from the
conductors shall be 15 %, with a minimum value of 10 % for an individual wire.
6.1.2 Construction
Conductors shall be in accordance with EN 60228.
NOTE The class of the conductor relevant to the various types of cable is given in EN 50264-2-1, EN 50264-2-2, EN 50264-3-1 and
EN 50264-3-2.
6.1.3 Check of construction
Conformity with the requirements of 6.1.1 and 6.1.2 shall be checked by inspection and by measurement.
6.1.4 Electrical resistance
The resistance of each conductor at 20 °C shall be in accordance with the requirements of EN 60228 for the
given class of conductor.
Compliance shall be checked by the test given in EN 50305, 6.1.
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6.1.5 Separator tape
A non-hygroscopic separator tape of coloured material may be placed between the conductor and insulation.
If used, the separator tape shall be easily removable from the conductor.
6.1.6 Conductor screening
Where specified in EN 50264-2-1 or EN 50264-3-1 the conductor screening shall consist of either a
semi-conducting tape, or a layer of extruded semi-conducting compound, or a combination of both.
It shall be easily removable from the conductor.
6.2 Insulation system
6.2.1 Material
The insulation system shall be manufactured from materials as defined in either 3.1 or 3.2 of this part, or a
combination of both. It shall conform to the requirements given in Table 2a or Table 2b and as specified
below:
In Table 2a for Part 2-1 and Part 2-2 cables:
EI 101 low temperature resistant, oil resistant;
EI 102 extra low temperature resistant, oil resistant;
EI 103 low temperature resistant, extra oil and fuel resistant;
EI 104 extra low temperature resistant, extra oil and fuel resistant;
EI 105 extra low temperature resistant, non oil resistant.
In Table 2b for Part 3-1 and Part 3-2 cables:
EI 106 low temperature resistant, oil resistant;
EI 107 extra low temperature resistant, oil resistant;
EI 108 low temperature resistant, extra oil and fuel resistant;
EI 109 extra low temperature resistant, extra oil and fuel resistant;
EI 110 extra low temperature resistant, non oil resistant.
NOTE EI 105 and EI 110 are not fuel or acid/alkali resistant.
6.2.2 Multilayer insulation system
It is permitted to use types EI 105 and EI 110 as the inner layer of a multilayer insulation system, and types
EI 101 to EI 104 and EI 106 to EI 109 as the outer layer of an insulation system. In the case of multilayer
insulation systems, test pieces required for mechanical and related tests shall be prepared as given in
Annex C.
6.2.3 Application
The insulation system shall be applied by extrusion and may consist of one or more closely adherent layers.
The insulation system shall form a compact and homogeneous body and shall be so applied that it fits
closely on the conductor or over the separator tape or over the conductor screening and it shall be possible
to remove the insulation system without damage to the tinned conductor.
The insulation system shall be smooth, uniformly applied and substantially circular.
Conformity shall be checked by inspection and by manual testing.
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6.2.4 Thickness
The mean value of the thickness of insulation shall not be less than the specified value for each type and
size of cable as specified in EN 50264-2-1, EN 50264-2-2, EN 50264-3-1 and EN 50264-3-2.
It is permissible for the thickness at any one place to be less than the specified value provided that the
difference does not exceed 0,1 mm + 10 % of the specified value.
Conformity shall be checked by the procedure given in Annex D.
6.3 Fillers, tapes and inner coverings
6.3.1 General
Tapes may be applied as a separator over the insulation of an individual core or as a binder over the
assembly of cores.
Inner coverings may be applied over binders or laid up cores to make a circular assembly for screen
applications.
In such cases the requirements in 6.3.2 and 6.3.3 shall apply.
6.3.2 Material
The fillers, tapes and inner coverings, if any, shall be composed of non-hygroscopic material having no
harmful interactions with the constituents of the cable, suitable for the operating temperature and compatible
with the cable components with which they are in contact.
Conformity with this requirement shall be checked by the tests given in the particular specification.
All non-metallic components shall fulfil the requirements of Clause 9 and Table 3.
6.3.3 Application
Where specified the fillers shall be applied either separately or as part of the sheath to form a compact and
reasonably circular cable. It shall be possible to remove the sheath and fillers, if any, from the cable without
damaging the insulation of cores.
Conformity shall be checked by visual examination and manual test.
6.4 Metallic screen
Where a metallic screening braid is specified it shall consist of tin coated, annealed copper wires. There shall
be no more than one splice in any spindle of the braid over any 10 cm length of the braid. The braid shall be
applied evenly, it should neither slip nor leave a permanent imprint in the insulat
...
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