SIST EN 50264-3-2:2008

Railway applications - Railway rolling stock power and control cables having special fire performance -- Part 3-2: Cables with crosslinked elastomeric insulation with reduced dimensions - Multicore cables

EN 50264-3-2 specifies requirements for, and constructions and dimensions of, multicore cables of the following types and voltage ratings: •   300/500 V screened or unscreened (1 mm2, 1,5 mm2 and 2,5 mm2, number of cores from 2 to 40); •   0,6/1 kV screened or unscreened, (1,5 mm2 to 50 mm2, 2, 3 and 4 cores). NOTE    Not all conductor sizes or number of cores are specified for every type. All cables have class 5 tinned copper conductors to EN 60228, halogen-free insulation and halogen-free sheath. They are for use in railway rolling stock as fixed wiring, or wiring where limited flexing in operation is encountered. The requirements provide for a continuous conductor temperature not exceeding 90 C and a maximum temperature for short circuit conditions of 200 C based on a duration of 5 s. Under fire conditions the cables exhibit special performance characteristics in respect of maximum permissible flame propagation (flame spread) and maximum permissible emission of smoke and toxic gases. EN 50264-3-2 should be read in conjunction with Part 1 “General requirements”.

Bahnanwendungen - Starkstrom- und Steuerleitungen für Schienenfahrzeuge mit verbessertem Verhalten im Brandfall -- Teil 3-2: Leitungen mit vernetzter elastomerer Isolierung mit reduzierten Abmessungen - Mehr- und vieladrige Leitungen

EN 50264-3-2 legt Anforderungen an und Aufbauten und Abmessungen von mehr- und vieladrigen Leitungen für folgende Bauarten und Nennspannungen fest: –   300 V/500 V   mit oder ohne Schirm    (1 mm2, 1,5 mm2 und 2,5 mm2, Aderzahlen von 2 bis 40); –   0,6 kV/1 kV   mit oder ohne Schirm    (1,5 mm2 bis 50 mm2, 2, 3 und 4 Adern). ANMERKUNG    Nicht alle Leiterquerschnitte oder Aderzahlen sind für jede Bauart festgelegt. Alle Leitungen haben einen verzinnten Kupferleiter Klasse 5 nach EN 60228, eine halogenfreie Isolierung und gegebenenfalls einen halogenfreien Mantel. Sie sind für feste Verlegung im Schienenfahrzeug bestimmt oder für Verdrahtungen, bei denen im Betrieb begrenzt mit Bewegungen gerechnet werden muss. Die Anforderungen berücksichtigen eine dauernde Leitertemperatur von nicht mehr als 90 °C und eine maximale Kurzschlusstemperatur von 200 °C bei einer Dauer von 5 Sekunden. Unter Brandbedingungen zeigen die Leitungen besondere Leistungsmerkmale hinsichtlich der maximal zulässigen Weiterleitung der Flammen (Ausbreitung der Flammen) und der höchsten zulässigen Emission von Rauch und giftigen Gasen  EN 50264-3-2 sollte in Verbindung mit Teil 1 „Allgemeine Anforderungen“ gelesen werden.

Applications ferroviaires - Câbles de puissance et de contrôle à comportement au feu spécifié pour matériel roulant ferroviaire -- Partie 3-2: Câbles à enveloppe isolante réticulée de faibles dimensions - Câbles multiconducteurs

La EN 50264-3-2 spécifie les prescriptions, la construction et les dimensions des câbles multiconducteurs des types et tensions assignées suivants: -   300/500 V avec ou sans blindage (de 1 mm2, 1,5 mm2 et 2,5 mm2; de 2 à 40 conducteurs); -   0,6/1 kV   avec ou sans blindage   (de 1 mm2 à 50 mm2; de 2, 3 et 4 conducteurs). NOTE    Les combinaisons des sections et des nombres de conducteurs ne sont pas toutes spécifiées pour chaque type. Tous les câbles possèdent une âme en cuivre étamé de classe 5 selon la EN 60228, une isolation et une gaine sans halogènes. Ils sont destinés aux installations fixes ou soumis à de faibles flexions en service des matériels roulants ferroviaires. Les prescriptions sont basées pour une température permanente de l’âme ne dépassant pas 90 °C et à une température maximale de 200 °C pour une durée de 5 s en cas de court-circuit. Les câbles présentent, en cas d’incendie, des performances particulières de propagation maximale admissible de la flamme (longueur brûlée) et d’émission de fumées et de gaz toxiques. Il est recommandé de lire la EN 50264-3-2 conjointement avec la Partie 1 “Prescriptions générales”.

Železniške naprave - Energetski in krmilni kabli za železniška vozna sredstva, ki imajo posebne ognjevarne lastnosti - 3-2. del: Kabli z zamreženo elastomerno izolacijo z zmanjšanimi merami - Večžilni kabli

General Information

• Status: Published
• Publication Date: 21-Jul-2008
• ICS: 13.220.20 - Fire protection
• ICS: 29.060.20 - Cables
• ICS: 45.060.01 - Railway rolling stock in general
• Technical Committee: IEKA - Electric cables
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 02-Jul-2008
• Due Date: 06-Sep-2008
• Completion Date: 22-Jul-2008
• Ref Project: EN 50264-3-2:2008 - Railway applications - Railway rolling stock power and control cables having special fire performance - Part 3-2: Cables with crosslinked elastomeric insulation with reduced dimensions - Multicore cables

Overview

EN 50264-3-2:2008 is a CENELEC (CLC) standard for railway rolling stock multicore cables with crosslinked elastomeric insulation and reduced dimensions. It specifies construction, dimensions, marking and performance requirements for halogen‑free power and control cables with enhanced fire performance used in railway vehicles. EN 50264-3-2 is part of the EN 50264 series and should be read together with Part 1 (General requirements).

Key topics and technical requirements

• Voltage ratings and types
  • 300/500 V control cables (screened or unscreened): conductor sizes 1.0, 1.5, 2.5 mm²; number of cores 2–40 (not all combinations specified).
  • 0.6/1 kV power cables (screened or unscreened): conductor sizes 1.5 mm² to 50 mm²; 2, 3 and 4 cores.
• Conductors and materials
  • Class 5 tinned copper conductors per EN 60228.
  • Halogen‑free insulation and halogen‑free sheath for reduced toxic/fume emission in fires.
• Thermal limits
  • Continuous conductor temperature ≤ 90 °C.
  • Short‑circuit temperature up to 200 °C for a 5 s duration.
• Fire performance
  • Cables must meet limits on flame propagation (flame spread), smoke emission and toxic gas release under fire conditions; special fire tests are referenced (e.g., EN 50305, EN 60332-1-2, EN 61034-2).
• Mechanical & identification requirements
  • Designed for fixed wiring or installations with limited flexing.
  • Marking must include manufacturer, EN reference, voltage, number of cores & conductor size, and a code designation (an "S" is added if screened).
  • Core identification: cores are normally black (except earth); identification by printed numbers or colours in accordance with HD 308 and EN 50334.
• Tests and documentation
  • Detailed test schedule and methods are specified (electrical, mechanical, ageing, reaction-to-fire, low-temperature bending/impact, compatibility, etc.) and referenced to EN 50305 and relevant EN/IEC methods.

Applications and users

• Typical application: fixed power and control wiring within railway rolling stock (locomotives, EMUs, passenger coaches, trams) where space saving, fire safety and halogen‑free behavior are important.
• Primary users:
  • Railway OEMs and rolling stock designers
  • Cable manufacturers and suppliers
  • Rolling stock maintenance and procurement teams
  • Safety and compliance engineers specifying fire‑performance cables

Related standards

• EN 50264-1 (General requirements)
• EN 50264-2-1, EN 50264-2-2, EN 50264-3-1 (other parts of the series)
• EN 60228 (conductors)
• EN 50305, EN 50343, EN 50355 (test and selection guidance)
• EN 60332-1-2, EN 61034-2 (fire and smoke test methods)

This concise guide helps engineers and procurement specialists quickly understand EN 50264-3-2 scope, technical requirements and practical uses when selecting multicore railway cables with crosslinked elastomeric insulation and enhanced fire performance.

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2008
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LPDMRSRVHEQHRJQMHYDUQHODVWQRVWLGHO.DEOL]]DPUHåHQRHODVWRPHUQR
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Railway applications - Railway rolling stock power and control cables having special fire
performance -- Part 3-2: Cables with crosslinked elastomeric insulation with reduced
dimensions - Multicore cables
Bahnanwendungen - Starkstrom- und Steuerleitungen für Schienenfahrzeuge mit
verbessertem Verhalten im Brandfall -- Teil 3-2: Leitungen mit vernetzter elastomerer
Isolierung mit reduzierten Abmessungen - Mehr- und vieladrige Leitungen
Applications ferroviaires - Câbles de puissance et de contrôle à comportement au feu
spécifié pour matériel roulant ferroviaire -- Partie 3-2: Câbles à enveloppe isolante
réticulée de faibles dimensions - Câbles multiconducteurs
Ta slovenski standard je istoveten z: EN 50264-3-2:2008
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
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 50264-3-2
NORME EUROPÉENNE
June 2008
EUROPÄISCHE NORM
ICS 13.220.20; 29.060.20; 45.060.01

English version
Railway applications -
Railway rolling stock power and control cables
having special fire performance -
Part 3-2: Cables with crosslinked elastomeric insulation
with reduced dimensions -
Multicore cables
Applications ferroviaires - Bahnanwendungen -
Câbles de puissance et de contrôle Starkstrom- und Steuerleitungen
à comportement au feu spécifié für Schienenfahrzeuge mit verbessertem
pour matériel roulant ferroviaire - Verhalten im Brandfall -
Partie 3-2: Câbles à enveloppe isolante Teil 3-2: Leitungen mit vernetzter
réticulée de faibles dimensions - elastomerer Isolierung
Câbles multiconducteurs mit reduzierten Abmessungen -
Mehr- und vieladrige Leitungen

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 50264-3-2:2008 E
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 50264-3-2 on
2008-03-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2009-03-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2011-03-01
__________
- 3 - EN 50264-3-2:2008
Contents
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Definitions . 7
4 Rated voltage . 7
5 Marking and identification. . 7
5.1 Marking of cable . 7
5.2 Core identification. 8
5.3 Sheath . 8
6 Construction of cables . 8
6.1 General . 8
6.2 Conductor . 8
6.3 Insulation system. 9
6.4 Laying up of cores and fillers . 9
6.5 Metallic screen . 9
6.6 Sheath . 9
6.7 Construction . 10
7 Tests . 22
7.1 Definitions relating to tests . 22
7.2 Conductor resistance . 22
7.3 Voltage test . 22
7.4 Insulation resistance . 23
7.5 Dielectric strength on sample . 23
7.6 Spark test . 23
7.7 Surface resistance. 23
7.8 Ageing test . 23
7.9 Hot set test . 24
7.10 Compatibility . 24
7.11 Water absorption test on sheath . 24
7.12 Ozone resistance . 24
7.13 Mineral oil resistance . 25
7.14 Fuel resistance . 26
7.15 Acid and alkali resistance . 26
7.16 Bending test at low temperature (cores and cables with OD ≤ 12,5 mm). 26
7.17 Cold elongation test (cores and cables with OD > 12,5 mm). 27
7.18 Impact test at low temperature . 27
7.19 Reaction to fire . 27
7.20 Reaction to fire – components . 27
Annex A (normative) Code designation . 31
Bibliography . 31

Tables
Table 1 - Multicore cables - unscreened (300/500 V) . 10
Table 2 - Multicore cables - screened (300/500 V) . 12
Table 3 - Dimensions of core (0,6/1 kV) . 14
Table 4 - Two cores - (0,6/1 kV) unscreened . 15
Table 5 - Two cores - (0,6/1 kV) screened . 16
Table 6 - Three cores - (0,6/1 kV) unscreened. 17
Table 7 - Three cores - (0,6/1 kV) screened. 18
Table 8 - Four cores - (0,6/1 kV) unscreened. 19
Table 9 - Four cores - (0,6/1 kV) screened. 20
Table 10 - Schedule of tests for cables . 27

- 5 - EN 50264-3-2:2008
Introduction
The EN 50264 series covers cables, based upon halogen free materials, for use in railway rolling stock. It 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
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.
Part 1, “General requirements”, contains a more extensive introduction to EN 50264, and should be read in
conjunction with this Part 3-2.

1 Scope
EN 50264-3-2 specifies requirements for, and constructions and dimensions of, multicore cables of the
following types and voltage ratings:
2 2 2
• 300/500 V screened or unscreened (1 mm , 1,5 mm and 2,5 mm , number of cores from
2 to 40);
2 2
• 0,6/1 kV screened or unscreened, (1,5 mm to 50 mm , 2, 3 and 4 cores).
NOTE  Not all conductor sizes or number of cores are specified for every type.
All cables have class 5 tinned copper conductors to EN 60228, halogen-free insulation and halogen-free
sheath. They are for use in railway rolling stock as fixed wiring, or wiring where limited flexing in operation is
encountered. The requirements provide for a continuous conductor temperature not exceeding 90 °C and a
maximum temperature for short circuit conditions of 200 °C based on a duration of 5 s.
Under fire conditions the cables exhibit special performance characteristics in respect of maximum
permissible flame propagation (flame spread) and maximum permissible emission of smoke and toxic gases.
EN 50264-3-2 should be read in conjunction with Part 1 “General requirements”.
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 50264-1:2008 Railway applications – Railway rolling stock power and control cables having
special fire performance – Part 1: General requirements
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 50305:2002 Railway applications – Railway rolling stock cables having special fire
performance – Test methods
EN 50334 Marking by inscription for the identification of cores of electric cables
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)

- 7 - EN 50264-3-2:2008
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)
HD 308 Identification of cores in cables and flexible cords
3 Definitions
For the purposes of this document, the terms and definitions given in EN 50264-1 apply.
4 Rated voltage
The rated voltage for multicore cables shall be as follows:
2 2
a) 300/500 V (1 mm to 2,5 mm ) control cables;
2 2
b) 0,6/1 kV (1,5 mm to 50 mm ) power cables.
5 Marking and identification
5.1 Marking of cable
Cables shall be marked with the following:
• manufacturer’s name;
• EN reference;
• voltage rating (U );
o
• number of cores and conductor size;
• a code designation according to Annex A.
If a cable is screened, an additional letter, S, shall be added.

An example of a complete mark is:
XYZ EN 50264-3-2  300 V 37 x 1,5  FF S
The marking shall conform to the requirements of EN 50264-1, Clause 5.
5.2 Core identification
The cores of all cables, except the earthing conductor, shall be black unless otherwise specified.
The identification of the individual core in a cable, except the earthing conductor, shall be by printed number
or colour. The number shall be printed in a colour, which contrasts with the core colour. If a colour other than
black is specified it shall be a clearly identifiable colour in accordance with HD 308 and shall be durable. The
colour shall be throughout the whole of the insulation or on its surface. Durability shall be checked by the test
given in EN 50305, 10.1.
The marking by numbers shall conform to EN 50334, unless otherwise specified, and conformity shall be
checked by visual examination and measurement.
5.3 Sheath
The sheath shall be black unless otherwise agreed between the manufacturer and purchaser.
6 Construction of cables
6.1 General
Cores complying with this part or EN 50264-3-1 may be used as components of multicore cables
The control cable dimensions shall be as given in Tables 1 or 2 as appropriate to the cable type.
The power cable core dimensions shall be as given in Table 3 and the other cable dimensions as given in
Tables 4 to 9 as appropriate to the cable type.
If agreed between the purchaser and manufacturer, cables may be made with a number of cores not
specified in Tables 1 and 2. In such cases the thickness of the sheath and diameter of the braid wire (if any)
shall be those specified in the relevant table for the cable containing the next higher number of cores.
6.2 Conductor
Conductors shall be tin-coated annealed copper, class 5, according to EN 60228.
When tested in accordance with EN 10002-1 the minimum average elongation of the wires from the
conductor shall be 15 %, with a minimum value of 10 % for any individual wire.
NOTE  It is not necessary to test all individual wires. 5 % of wires or 10 wires, whichever is the least number, should be selected at
random.
- 9 - EN 50264-3-2:2008
6.3 Insulation system
The insulation shall be one or more extruded materials as defined in EN 50264-1 applied so as to meet the
requirements of compound type EI 106 to EI 110:
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.
To claim extra low temperature performance both insulation and sheaths shall be extra low temperature
resistant.
The insulation shall be applied to meet the requirements of EN 50264-1, 6.2.
The insulation thickness shall conform to the specified value given in Tables 1 to 3.
6.4 Laying up of cores and fillers
The cores shall be twisted together with either a continuous right or left-hand direction of lay.
The pitch or lay for primary cores shall not be greater than 20 times the diameter of the bunch of cores in the
cable.
NOTE  Non-hygroscopic fillers may be applied as given in EN 50264-1, 6.3. A synthetic binder tape may be used over the laid-up
assembly at the manufacturer’s discretion.
6.5 Metallic screen
Where screens are applied over cores a tape shall be used between cores and screens. The metallic
screening braid shall meet the requirements of EN 50264-1, 6.4.
6.6 Sheath
Sheath shall be an extruded material as defined in EN 50264-1 applied so as to meet the requirements of
compound type EM 101 to EM 104:
EM 101 low temperature resistant, oil resistant;
EM 102 extra low temperature resistant, oil resistant;
EM 103 low temperature resistant, extra oil and fuel resistant;
EM 104 extra low temperature resistant, extra oil and fuel resistant.
The sheath shall consist of one or more extruded layers of the same type.
The sheath shall be applied to meet the requirements of EN 50264-1, 6.6.
The sheath thickness shall conform to the specified value given in Tables 1, 2 and 4 to 9.

6.7 Construction
Power and control cables of all types shall be composed of the following components in the order given:
• conductor flexible tin coated annealed copper, class 5;
• separator optional;
• insulation a compound or compounds as given in 6.3;
• laying up and fillers as given in 6.4;
• metallic screen (where required) as given in 6.5 and specified in Tables 2, 5, 7, 9;
• separator optional;
• sheath compound as given in 6.6.

- 11 - EN 50264-3-2:2008
Table 1 - Multicore cables - unscreened (300/500 V)
1 2 3 4 5 6 7 8 9 10 11 1
Number and Conductor Mean Core Mean Overall diameter Conductor Insulation Insulation Number and
nominal diameter thickness dimensions thickness of resistance resistance resistance nominal cross-
D a
cross- of sheath at 20 °C at 20 °C
at 20 °C
sectional area
b
d
sectional insulation EI 110 EI 106, 107,
a
108, 109
area
min. max. min. max. max. min. min.
2 2
mm mm mm mm mm mm mm
n × mm Ω/km MΩ.km MΩ.km n × mm
2 × 1 0,4  0,6 5,3 6,2 20,0 15,0 7,5 2 × 1
4 × 1 0,4  0,6 6,1 7,2 20,0 15,0 7,5 4 × 1
0,4  0,7 7,5 8,7 20,0 15,0 7,5
7 × 1 7 × 1
0,4  0,7 9,1 10,6 20,0 15,0 7,5
9 × 1 9 × 1
1,25 0,4 2,0 2,4 0,7
...