SIST EN 50306-4:2020
(Main)Railway applications - Railway rolling stock cables having special fire performance - Thin wall - Part 4: Multicore and multipair screened or not screened sheathed cables
Railway applications - Railway rolling stock cables having special fire performance - Thin wall - Part 4: Multicore and multipair screened or not screened sheathed cables
EN 50306-4 specifies requirements for, and constructions and dimensions of, multicore and multipair cables rated voltage Uo/U: 300/500 V, of the following types:
- unscreened, sheathed for either exposed or protected wiring, 0,5 mm2 to 2,5 mm2, number of cores from 2 to 48;
- screened, sheathed for either exposed or protected wiring, 0,5 mm2 to 2,5 mm2, number of cores from 2 to 8;
- unscreened, sheathed for either exposed or protected wiring, 0,5 mm2 to 1,5 mm2, number of screened pairs of cores from 2 to 7;
- screened, sheathed for either exposed or protected wiring, 0,5 mm2 to 1,5 mm2, number of unscreened pairs of cores from 2 to 7.
Bahnanwendungen - Kabel und Leitungen für Schienenfahrzeuge mit verbessertem Verhalten im Brandfall - Reduzierte Isolierwanddicken - Teil 4: Mehradrige und mehrpaarige Leitungen
Applications ferroviaires - Câbles pour matériel roulant ferroviaire ayant des performances particulières de comportement au feu - Isolation mince - Partie 4: Câbles multiconducteurs et multipaires gainés blindés ou non blindés
Le présent document définit les exigences de construction et dimensionnelles des câbles multiconducteurs et multipaires, de tension assignée U0/U = 300 V/500 V, des types suivants:
- câbles gainés non blindés pour câblage exposé ou protégé (section de 0,5 mm2 à 2,5 mm2, 2 à 48 conducteurs);
- câbles gainés blindés pour câblage exposé ou protégé (section de 0,5 mm2 à 2,5 mm2, 2 à 8 conducteurs);
- câbles gainés non blindés pour câblage exposé ou protégé (section de 0,5 mm2 à 1,5 mm2, 2 à 7 paires de conducteurs blindés).
- câbles gainés blindés pour câblage exposé ou protégé (section de 0,5 mm2 à 1,5 mm2, 2 à 7 paires de conducteurs non blindés).
Tous les câbles sont constitués d'âmes câblées en cuivre étamé sous enveloppe isolante et gaine sans halogènes d'épaisseur mince. Ces types de câbles sont spécifiés pour les situations exposées (classe E) et pour les situations protégées (classe P). Ils sont destinés aux câblages fixes, ou aux câblages dont les flexions en service sont limitées, dans le matériel roulant ferroviaire.
Ces câbles sont conçus pour résister à des contraintes thermiques occasionnelles provoquant un vieillissement thermique équivalent à celui résultant d’un fonctionnement continu à 90 °C. Pour les câbles normalisés, cette température est déterminée par l’essai d’acceptation décrit dans l’EN 50305, qui consiste à appliquer un vieillissement thermique accéléré de longue durée (5 000 h) indiquant un indice de température de 110 °C/20 000 h. Si le client exigeait des prédictions de durée de vie, ces prédictions seraient fondées sur l’indice de température du produit tel que fourni par le fabricant.
La température maximale en cas de court-circuit est de 160 °C pour une durée de 5 s.
Lorsqu'ils sont soumis au feu, les câbles présentent des caractéristiques de performance particulières quant aux valeurs maximales admissibles relatives à la propagation de la flamme et l'émission de fumées et de gaz toxiques. Ces exigences permettent aux câbles de satisfaire au niveau de risque 3 de l’EN 45545-1 et de l’EN 45545-2.
L’EN 50306 4:2020 est prévu pour être utilisé conjointement avec l’EN 50306 1:2020, Exigences générales, l’EN 50306-2:2020, Câbles monoconducteurs, et l’EN 50306 3:2020, Câbles monoconducteurs et multiconducteurs blindés avec gaine d’épaisseur mince.
Železniške naprave - Kabli v železniških vozilih s posebno požarno odpornostjo - Tanka stena - 4. del: Večžilni in večparni zaslonjeni in nezaslonjeni oplaščeni kabli
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 50306-4:2020
01-junij-2020
Nadomešča:
SIST EN 50306-4:2003
Železniške naprave - Kabli v železniških vozilih s posebno požarno odpornostjo -
Tanka stena - 4. del: Večžilni in večparni zaslonjeni in nezaslonjeni oplaščeni kabli
Railway applications - Railway rolling stock cables having special fire performance - Thin
wall - Part 4: Multicore and multipair screened or not screened sheathed cables
Bahnanwendungen - Kabel und Leitungen für Schienenfahrzeuge mit verbessertem
Verhalten im Brandfall - Reduzierte Isolierwanddicken - Teil 4: Mehradrige und
mehrpaarige Leitungen
Applications ferroviaires - Câbles pour matériel roulant ferroviaire ayant des
performances particulières de comportement au feu - Isolation mince - Partie 4: Câbles
multiconducteurs et multipaires gainés blindés ou non blindés
Ta slovenski standard je istoveten z: EN 50306-4:2020
ICS:
13.220.40 Sposobnost vžiga in Ignitability and burning
obnašanje materialov in behaviour of materials and
proizvodov pri gorenju products
29.060.20 Kabli Cables
45.060.01 Železniška vozila na splošno Railway rolling stock in
general
SIST EN 50306-4:2020 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 50306-4:2020
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SIST EN 50306-4:2020
EUROPEAN STANDARD EN 50306-4
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2020
ICS 13.220.40; 29.060.20; 45.060.01 Supersedes EN 50306-4:2002 and all of its amendments
and corrigenda (if any)
English Version
Railway applications - Railway rolling stock cables having
special fire performance - Thin wall - Part 4: Multicore and
multipair screened or not screened sheathed cables
Applications ferroviaires - Câbles pour matériel roulant Bahnanwendungen - Kabel und Leitungen für
ferroviaire ayant des performances particulières de Schienenfahrzeuge mit verbessertem Verhalten im
comportement au feu - Isolation mince - Partie 4: Câbles Brandfall - Reduzierte Isolierwanddicken - Teil 4:
multiconducteurs et multipaires gainés blindés ou non Mehradrige und mehrpaarige Leitungen
blindés
This European Standard was approved by CENELEC on 2019-12-30. 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 CEN-CENELEC
Management Centre 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 CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50306-4:2020 E
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SIST EN 50306-4:2020
EN 50306-4:2020 (E)
Contents Page
European foreword .4
Introduction .5
1 Scope .6
2 Normative references .6
3 Terms and definitions .7
4 Multicore cables - sheathed .7
4.1 General .7
4.2 Marking and code designation .7
4.2.1 Marking of cable .7
4.2.2 Code Designation .8
4.2.3 Marking on the insulation of cores .8
4.3 Rated voltage .8
4.4 Construction .8
4.4.1 Cores .8
4.4.2 Laying-up of cores .8
4.4.3 Sheath .8
5 Tests . 10
5.1 Definitions relating to tests . 10
5.2 Voltage test on cable . 10
5.3 Tests at low temperature . 10
5.4 Ozone resistance of sheath . 11
5.5 Compatibility . 11
5.6 Fire performance . 12
6 Multicore cables - screened and sheathed . 13
6.1 General . 13
6.2 Designation, marking and coding . 13
6.2.1 Marking of cable . 13
6.2.2 Marking on the insulation of cores . 14
6.3 Rated voltage . 14
6.4 Construction . 14
6.4.1 Cores . 14
6.4.2 Laying-up of cores . 14
6.4.3 Metallic braid screening . 14
6.4.4 Sheath . 15
7 Tests . 16
7.1 Definitions relating to tests . 16
7.2 Voltage test on cable . 16
7.3 Spark test on the sheath . 17
7.4 Tests at low temperature . 17
7.5 Ozone resistance . 17
7.6 Fire performance . 18
8 Multipair cables - individually screened and sheathed and with an overall sheath. 19
8.1 General . 19
2
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SIST EN 50306-4:2020
EN 50306-4:2020 (E)
8.2 Designation, marking and coding . 19
8.2.1 Marking of the cable . 19
8.2.2 Marking on the insulation of cores . 20
8.2.3 Marking on the sheath of the pair . 20
8.3 Rated voltage . 20
8.4 Construction . 20
8.4.1 Pairs . 20
8.4.2 Laying-up of pairs . 20
9 Tests . 21
9.1 Definitions relating to tests . 21
9.2 Voltage test . 22
10 Multipair cables – general screened and sheathed . 23
10.1 General . 23
10.2 Designation, marking and coding . 23
10.2.1 Marking of cable . 23
10.2.2 Marking on the insulation of cores . 24
10.3 Rated voltage . 24
10.4 Construction . 24
10.4.1 Pairs . 24
10.4.2 Laying-up of pairs . 24
10.4.3 Metallic braid screening . 24
10.4.4 Outer sheath of the cable . 25
11 Tests . 26
11.1 Definitions relating to tests . 26
11.2 Voltage test - core to screen. 26
Annex A (informative) Guidance on selection of cables for type approval . 29
Bibliography . 30
3
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SIST EN 50306-4:2020
EN 50306-4:2020 (E)
European foreword
This document (EN 50306-4:2020) has been prepared by CLC/TC 20, “Electric cables.
The following dates are fixed:
• latest date by which this document has (dop) 2020-12-30
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2022-12-30
standards conflicting with this document
have to be withdrawn
This document supersedes EN 50306-4:2002 and all of its amendments and corrigenda (if any).
This edition includes the following significant technical changes with respect to the previous edition:
— The documents have been updated to reflect the changes in the test standard EN 50305;
— The range of the conductor cross sections has been extended;
— The reference to cited standards (e.g. EN 60811 series) has been updated.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
4
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SIST EN 50306-4:2020
EN 50306-4:2020 (E)
Introduction
The EN 50306 series covers a range of sheathed and unsheathed cables with thin wall thickness
insulation, based on halogen-free materials, for use in railway rolling stock. It is divided into four parts:
Part 1: General requirements;
Part 2: Single core cables;
Part 3: Single core and multicore cables screened and thin wall sheathed;
Part 4: Multicore and multipair screened or not screened sheathed cables.
Special test methods referred to in the EN 50306 series are given in EN 50305. A guide to use is
given in EN 50355 and rules for installation are given in EN 50343.
EN 50306-1:2020, General requirements, contains a more extensive introduction to the EN 50306
series and should be read in conjunction with this document.
5
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SIST EN 50306-4:2020
EN 50306-4:2020 (E)
1 Scope
This document specifies requirements for, and constructions and dimensions of, multicore and
multipair cables rated voltage U /U: 300/500 V, of the following types:
0
2 2
— unscreened, sheathed for either exposed or protected wiring (0,5 mm to 2,5 mm , number of
cores from 2 to 48);
2 2
to 2,5 mm , number of cores
— screened, sheathed for either exposed or protected wiring (0,5 mm
from 2 to 8);
2 2
to 1,5 mm , number of
— unscreened, sheathed for either exposed or protected wiring (0,5 mm
screened pairs of cores from 2 to 7).
2 2
to 1,5 mm , number of
— screened, sheathed for either exposed or protected wiring (0,5 mm
unscreened pairs of cores from 2 to 7).
All cables have stranded tinned copper conductors, halogen-free, thin wall thickness insulation and
standard wall thickness sheath. Cable types are specified for use in exposed situations (Class E), and
for protected situations (Class P). They are for use in railway rolling stock as fixed wiring or wiring
where limited flexing in operation is encountered.
These cables are rated for occasional thermal stresses causing ageing equivalent to continuous
operational life at a temperature of 90 °C. For standard cables this is determined by the acceptance
test defined in EN 50305, using accelerated long-term (5 000 h) thermal ageing indicating a
110 °C/20 000 h temperature index. If the customer were to require lifetime predictions this would be
demonstrated based on the temperature index of the product as supplied by the manufacturer.
The maximum temperature for short circuit conditions is 160 °C based on 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. These requirements are specified to permit the cables to satisfy Hazard Level 3 of EN 45545-1
and EN 45545-2.
EN 50306-4:2020 is expected to be used in conjunction with EN 50306-1:2020, General requirements,
EN 50306-2:2020, Single core cables, and EN 50306-3:2020, Single core and multicore cables.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 45545-1, Railway applications - Fire protection on railway vehicles - Part 1: General
EN 50264-1:2008, Railway applications - Railway rolling stock power and control cables having
special fire performance - Part 1: General requirements
EN 50305:2020, Railway applications - Railway rolling stock cables having special fire performance -
Test methods
EN 50306-1:2020, Railway applications - Railway rolling stock cables having special fire performance -
Thin wall - Part 1: General requirements
EN 50306-2:2020, Railway applications - Railway rolling stock cables having special fire performance -
Thin wall - Part 2: Single core cables
6
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SIST EN 50306-4:2020
EN 50306-4:2020 (E)
EN 50306-3:2020, Railway applications - Railway rolling stock cables having special fire performance -
Thin wall - Part 3: Single core and multicore cables screened and thin wall sheathed
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
EN 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
EN 61034-2, Measurement of smoke density of cables burning under defined conditions - Part 2: Test
procedure and requirements
EN 60811 (all parts), Electric and optical fibre cables - Test methods for non-metallic materials
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISOOnline browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
4 Multicore cables - sheathed
4.1 General
The completed cables shall conform to the applicable general requirements given in EN 50306-1:2020
and to the specific requirements of Clause 4 and Clause 5.
Conformity with the requirements shall be checked by inspection and by the tests given in Table 2.
4.2 Marking and code designation
4.2.1 Marking of cable
Cables shall be marked with the following:
— Manufacturer's name;
— EN reference;
— table number;
— cable class (P or E);
— Voltage rating (U0);
— No. of cores and conductor size;
— A code designation according for use of the cable (see 4.2.2);
— Conductor temperature rating
For example:
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SIST EN 50306-4:2020
EN 50306-4:2020 (E)
XYZ EN 50306-4 1E 300 V 2x1,5 MM 90
The marking shall conform to the requirements of EN 50306-1:2020, Clause 5.
4.2.2 Code Designation
The following letters shall be used as a code to identify the suitability of a particular cable for use
under one of the Hazard Levels of EN 45545-1, and to indicate performance levels relating to low
temperature and to oil and fuel resistance:
Hazard Level EN 45545-1 HL3
— low temperature / oil resistance C
— extra low temperature / oil resistance F
— low temperature / extra oil and fuel resistance J
— extra low temperature / extra oil and fuel resistance M
For sheathed cables two letters are required, one for the insulation and one for the sheath
4.2.3 Marking on the insulation of cores
The cores shall be marked 1, 2, etc., in accordance with the requirements, given in EN 50306-2:2020,
4.3.2.
However, the core number one may be marked as the relevant single core in accordance with the
requirements of EN 50306-2:2020, 4.3.2.
Durability of marking shall be in accordance with EN 50305:2020, 10.1.
4.3 Rated voltage
The rated voltage recognized for the purposes of this standard shall be U0/U = 300V / 500V
NOTE See EN 50355 and 50343 for further information.
4.4 Construction
4.4.1 Cores
Each insulated single core shall conform to the requirements given in EN 50306-2:2020.
4.4.2 Laying-up of cores
The cores shall be twisted together.
The pitch of lay for the cores shall not be greater than 20 times the diameter of the laid-up cores in the
cable.
4.4.3 Sheath
The sheath shall be a compound of type EM 101 to EM 104, and shall be applied by extrusion.
Compounds type EM 101 to EM 104 together with their requirements are defined in EN 50264-1.
The sheath material from the finished cable shall be tested in accordance with the requirements given
in EN 50264-1:2008, Table 4.
The sheath shall be smooth and uniformly applied; the application shall ensure that cables with a class
E sheath are substantially circular. The thickness of sheath shall conform to the specified value given
in Table 1 according to the class.
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SIST EN 50306-4:2020
EN 50306-4:2020 (E)
The sheath colour shall be black, unless otherwise specified.
Table 1 — Requirements for construction of multicore cables - sheathed
1 2 3 4 5 6 7
Number of Cables class E Cables class P
cores and
nominal
cross-section
of the
conductor
Average Overall diameter Minimum Overall diameter
minimum thickness
thickness of sheath at
of sheath any point
min. max. min. max.
2
mm mm mm mm mm mm mm
2 × 0,5 1,0 4,9 5,9 0,42 3,5 4,5
3 × 0,5 1,0 5,1 6,1 0,42 3,8 4,8
4 × 0,5 1,0 5,5 6,5 0,42 4,1 5,3
7 × 0,5 1,0 6,3 7,3 0,42 4,9 6,1
13 × 0,5 1,0 8,3 9,3 0,56 7,3 8,5
19 × 0,5 1,0 9,0 10,2 0,56 8,1 9,3
37 × 0,5 1,0 12,3 13,5 0,56 10,8 12,2
2 × 0,75 1,0 5,3 6,3 0,42 4,0 5,0
3 × 0,75 1,0 5,5 6,5 0,42 4,2 5,2
4 × 0,75 1,0 6,0 7,0 0,42 4,6 5,8
7 × 0,75 1,0 6,9 7,9 0,42 5,5 6,6
13 × 0,75 1,0 9,1 10,3 0,56 8,2 9,4
19 × 0,75 1,0 10,0 11,2 0,56 9,0 10,4
37 × 0,75 1,0 13,2 14,4 0,56 12,2 13,6
48 × 0,75 1,0 14,8 16,4 0,56 13,9 15,7
2 × 1,0 1,0 5,6 6,6 0,42 4,3 5,3
3 × 1,0 1,0 5,9 6,9 0,42 4,6 5,6
4 × 1,0 1,0 6,3 7,3 0,42 4,9 6,1
7 × 1,0 1,0 7,3 8,3 0,42 6,0 7,2
13 × 1,0 1,0 9,7 10,9 0,56 8,7 10,1
19 × 1,0 1,0 10,7 11,9 0,56 9,8 11,2
37 × 1,0 1,0 14,0 15,6 0,56 13,3 14,7
2 × 1,5 1,0 6,3 7,3 0,42 5,0 6,0
3 × 1,5 1,0 6,6 7,6 0,42 5,3 6,3
4 × 1,5 1,0 7,4 8,4 0,42 6,0 7,2
7 × 1,5 1,0 8,6 9,8 0,56 7,7 8,9
13 × 1,5 1,0 11,7 12,9 0,56 10,7 12,1
19 × 1,5 1,0 13,0 14,2 0,56 12, 13,4
37 × 1,5 1,0 17,2 18,8 0,56 16,2 18,
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SIST EN 50306-4:2020
EN 50306-4:2020 (E)
1 2 3 4 5 6 7
Number of Cables class E Cables class P
cores and
nominal
cross-section
of the
conductor
Average Overall diameter Minimum Overall diameter
minimum thickness
thickness of sheath at
of sheath any point
min. max. min. max.
2
mm mm mm mm mm mm mm
2 × 2,5 1,0 7,7 8,7 0,56 6,7 7,9
3 × 2,5 1,0 8,1 9,1 0,56 7,1 8,3
4 × 2,5 1,0 8,8 10,0 0,56 7,9 9,1
For other compositions (number of cores), sheath thicknesses shall follow in principle the value
mentioned in the Table 1 or ask the manufacturer for adequate technical design depending on the
application requirements. The cable marking shall keep the standard name as EN 50306-4:2020.
5 Tests
5.1 Definitions relating to tests
The definition of Type (T), Sample (S) and Routine (R) tests is as given in EN 50306-1:2020,
Clause 3.
NOTE 1 Tests classified as Sample (S) or Routine (R) could be required as part of any approval schemes.
NOTE 2 Annex A gives guidance on the selection of cables for type approval.
5.2 Voltage test on cable
The test shall be carried out in accordance with EN 50305:2020, 6.2.1, using an AC or DC voltage and
the following conditions:
— sample length 20 m
— voltage (AC) 2 kV
— voltage (DC) 4,8 kV
— duration of application 5 min
— test temperature (20 ± 5) °C
At the conclusion of the test there shall be no breakdown of the insulation.
5.3 Tests at low temperature
a) Bending test for cable diameter ≤ 12,5mm
The test shall be carried out at (- 40 ± 2) °C in accordance with EN 60811-504.
At the conclusion of the test there shall be no cracks in the sheath.
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SIST EN 50306-4:2020
EN 50306-4:2020 (E)
Where cables sheaths are not to be used at extra low temperature, the test may be carried out at
(- 25 ± 2) °C.
b) Elongation test for cable diameter > 12,5mm
The test shall be carried out at (- 40 ± 2) °C in accordance with EN 60811-505.
The elongation of the sheath shall be not less than 30 %.
Where cables sheaths are not to be used at extra low temperatures, the test may be carried out at
(- 25 ± 2) °C.
c) Impact
The test shall be carried out at (- 25 ± 2) °C in accordance with EN 50305:2020, 5.1.
At the conclusion of the test there shall be no cracks in the inside or the outside of the sheath, nor on
the outside of the insulation.
5.4 Ozone resistance of sheath
The test shall be carried out either in accordance with EN 60811-403 (for Method A) or
EN 50305:2020, 7.4.2, (for Method B), using the following conditions:
The choice of Method A or Method B may be made by the supplier.
Method A:
−4
concentration (%) (250 to 300) × 10
test temperature (25 ± 2) °C
test duration 24 h
test requirements no cracks
Method B:
−6
concentration (%) (200 ± 50) × 10
test temperature (40 ± 2) °C
relative humidity (%) 55 ± 5
test duration 72 h
test requirements no cracks
5.5 Compatibility
The test shall be carried out in accordance with EN 50305:2020, 7.1. Cable shall be aged for 7 days at
the following temperatures:
(100 ± 2) °C for cables with a designated operating temperature of 90 °C;
Test requirement:
— tensile strength variation ± 30 % maximum
— elongation at break variation ± 30 % maximum
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SIST EN 50306-4:2020
EN 50306-4:2020 (E)
5.6 Fire performance
The completed cable shall conform to the requirements given in EN 50306-1:2020, 8.1, 8.2.1, 8.2.2 or
8.2.3 (depending upon overall diameter) and 8.3.
The sheath shall conform to the requirements of EN 50306-1:2020, Clause 9.
Table 2 — Schedule of tests for multicore cables - sheathed
1 2 3 4 5 6
Ref Test Catego-ry Test method given in Requirement
No of test given in
a
EN (Sub)clause
1 Electrical tests
1.1 Electrical resistance of conductors T, S EN 50305:2020 6.1 Table 1 of EN
50306-2:2020
1.2 Voltage test on complete cable T, S EN 50305:2020 6.2.1 5.2
2 Provisions covering constructional and
dimensional characteristics
2.1 Checking of conformity and constructional T, S EN 50306-1 Inspection 3.4 and Clause 6 of
provisions EN 50306-1:2020
2.2 Sheath:
(a) Application S EN 50306-1 Inspection and 6.6.2 of
manual test EN 50306-1:2020
(b) Thickness T, S EN 50306-1 A.2 Table 1
2.3 Overall diameter T, S EN 50306-1 6.7 Table 1
2.4 Identification and marking T, S EN 50306-4 Inspection and 4.2.1 and 4.2.3
measurement
2.5 Durability of identification T, S EN 50305:2020 10.1 5.3 of
EN 50306-1:2020
3 Tests of sheath material
3.1 Mechanical properties of sheath in state as T, S EN 60811-501 9.2 Table 4 of
delivered EN 50264-1:2008
3.2 Tests at low temperature
Bending (diameter ≤ 12,5 mm) T EN 60811-504 8.2 5.3(a)
Elongation (diameter > 12,5 mm) T EN 60811-505 8.4 5.3(b)
Impact resistance T EN 50305:2020 5.1 5.3(c)
3.3 Ozone resistance T EN 50305:2020 7.4.2 5.4
3.4 Water absorption (Gravimetric) T EN 60811-402 Table 4 of
EN 50264-1:2008
3.5 Compatibility test T EN 50305:2020 7.1 5.5
4 Fire performance
12
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SIST EN 50306-4:2020
EN 50306-4:2020 (E)
1 2 3 4 5 6
Ref Test Catego-ry Test method given in Requirement
No of test given in
a
EN (Sub)clause
4.1 Flame propaga
...
SLOVENSKI STANDARD
oSIST prEN 50306-4:2019
01-januar-2019
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Railway applications - Railway rolling stock cables having special fire performance - Thin
wall - Part 4: Multicore and multipair sheathed cables
Bahnanwendungen - Kabel und Leitungen für Schienenfahrzeuge mit verbessertem
Verhalten im Brandfall - Reduzierte Isolierwanddicken - Teil 4: Mehradrige und
mehrpaarige Leitungen
Applications ferroviaires - Câbles pour matériel roulant ferroviaire ayant des
performances particulières de comportement au feu - Isolation mince - Partie 4: Câbles
multiconducteurs et multipaires gainés
Ta slovenski standard je istoveten z: prEN 50306-4:2018
ICS:
13.220.40 Sposobnost vžiga in Ignitability and burning
obnašanje materialov in behaviour of materials and
proizvodov pri gorenju products
29.060.20 Kabli Cables
45.060.01 Železniška vozila na splošno Railway rolling stock in
general
oSIST prEN 50306-4:2019 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 50306-4:2019
EUROPEAN STANDARD DRAFT
prEN 50306-4
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2018
ICS Will supersede EN 50306-4:2002
English Version
Railway applications - Railway rolling stock cables having
special fire performance - Thin wall - Part 4: Multicore and
multipair sheathed cables
Applications ferroviaires - Câbles pour matériel roulant Bahnanwendungen - Kabel und Leitungen für
ferroviaire ayant des performances particulières de Schienenfahrzeuge mit verbessertem Verhalten im
comportement au feu - Isolation mince - Partie 4: Câbles Brandfall - Reduzierte Isolierwanddicken - Teil 4:
multiconducteurs et multipaires gainés Mehradrige und mehrpaarige Leitungen
This draft European Standard is submitted to CENELEC members for enquiry.
Deadline for CENELEC: 2019-02-08.
It has been drawn up by CLC/TC 20.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CENELEC 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 CEN-CENELEC Management Centre has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 67185 Ref. No. prEN 50306-4:2018 E
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prEN 50306-4:2018 (E)
Contents
European foreword .4
Introduction .5
1 Scope .6
2 Normative references .6
3 Multicore cables - sheathed .7
3.1 General .7
3.2 Marking and code designation .7
3.2.1 Marking of cable .7
3.2.2 Code Designation .7
3.2.3 Marking on the insulation of cores .8
3.3 Rated voltage .8
3.4 Construction .8
3.4.1 Cores .8
3.4.2 Laying-up of cores .8
3.4.3 Sheath .8
4 Tests . 10
4.1 Definitions relating to tests . 10
4.2 Voltage test on cable . 10
4.3 Tests at low temperature . 10
4.4 Ozone resistance of sheath . 11
4.5 Compatibility . 11
4.6 Reaction to fire . 11
5 Multicore cables - screened and sheathed . 13
5.1 General . 13
5.2 Designation, marking and coding . 13
5.2.1 Marking of cable . 13
5.2.2 Marking on the insulation of cores . 13
5.3 Rated voltage . 13
5.4 Construction . 14
5.4.1 Cores . 14
5.4.2 Laying-up of cores . 14
5.4.3 Metallic braid screening . 14
5.4.4 Sheath . 14
6 Tests . 16
6.1 Definitions relating to tests . 16
6.2 Voltage test on cable . 16
6.3 Spark test on the sheath . 16
6.4 Tests at low temperature . 16
6.5 Ozone resistance . 17
6.6 Reaction to fire . 17
7 Multipair cables - individually screened and sheathed and with an overall sheath. 19
7.1 General . 19
7.2 Designation, marking and coding . 19
2
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7.2.1 Marking of the cable . 19
7.2.2 Marking on the insulation of cores . 19
7.2.3 Marking on the sheath of the pair . 19
7.3 Rated voltage . 19
7.4 Construction . 20
7.4.1 Pairs . 20
7.4.2 Laying-up of pairs . 20
7.4.3 Outer sheath of the cable . 20
8 Tests . 21
8.1 Definitions relating to tests . 21
8.2 Voltage test - screen to screen . 22
9 Multipair cables – general screened and sheathed . 23
9.1 General . 23
9.2 Designation, marking and coding . 23
9.2.1 Marking of cable . 23
9.2.2 Marking on the insulation of cores . 24
9.3 Rated voltage . 24
9.4 Construction . 24
9.4.1 Pairs . 24
9.4.2 Laying-up of pairs . 24
9.4.3 Outer sheath of the cable . 24
10 Tests . 26
10.1 Definitions relating to tests . 26
10.2 Voltage test - core to screen. 26
Annex A (informative) Guidance on selection of cables for type approval . 28
Bibliography . 29
3
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prEN 50306-4:2018 (E)
European foreword
This document (prEN 50306-4:2018) has been prepared by Working Group 12, Railway cables, of
Technical Committee CENELEC TC 20, Electric cables, as part of the overall programme of work in
CENELEC TC 9X, Electrical and electronic applications for railways.
This document is currently submitted to the Enquiry.
The following dates are proposed:
• latest date by which the existence of this document has to (doa) dor + 6 months
be announced at national level
• latest date by which this document has to be implemented (dop) dor + 12 months
at national level by publication of an identical national
standard or by endorsement
• latest date by which the national standards conflicting with (dow) dor + 36 months
this document have to be withdrawn (to be confirmed or
modified when voting)
This document will supersede EN 50306-4:2002.
This edition includes the following significant technical changes with respect to the previous edition:
a) The documents have been updated to reflect the changes in the test standard EN 50305 (revision
starting in 2018);
b) The range of the conductor cross sections has been extended.
c) The reference to cited standards (e.g. 60811 series) has been updated.
4
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Introduction
EN 50306 covers a range of sheathed and unsheathed cables with thin wall thickness insulation,
based on halogen-free materials, for use in railway rolling stock. It is divided into four parts:
Part 1: General requirements;
Part 2: Single core cables;
Part 3: Single core and multicore cables screened and thin wall sheathed;
Part 4: Multicore and multipair cables sheathed.
Special test methods referred to in EN 50306 are given in EN 50305. A guide to use is given in
EN 50355 and rules for installation are given in EN 50343.
prEN 50306-1:2018, General requirements, contains a more extensive introduction to EN 50306 and
has to be read in conjunction with this European Standard.
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1 Scope
This document specifies requirements for, and constructions and dimensions of, multicore and
multipair cables rated voltage U /U: 300/500 V, of the following types:
o
2 2
– unscreened, sheathed for either exposed or protected wiring (0,5 mm to 2,5 mm , number of
cores from 2 to 48);
2 2
to 2,5 mm , number of cores
– screened, sheathed for either exposed or protected wiring (0,5 mm
from 2 to 8);
2 2
to 1,5 mm , number of
– unscreened, sheathed for either exposed or protected wiring (0,5 mm
screened pairs of cores from 2 to 7).
2 2
to 1,5 mm , number of
– screened, sheathed for either exposed or protected wiring (0,5 mm
unscreened pairs of cores from 2 to 7).
All cables have stranded tinned copper conductors, halogen-free, thin wall thickness insulation and
standard wall thickness sheath. Cable types are specified for use in exposed situations (Class E), and
for protected situations (Class P). They are for use in railway rolling stock as fixed wiring, or wiring
where limited flexing in operation is encountered.
These cables are rated for occasional thermal stresses causing ageing equivalent to continuous
operational life at a temperature of 90 °C. For standard cables this is determined by the acceptance
test defined in EN 50305, using accelerated long-term (5000h) thermal ageing indicating a
110 °C/20 000 h temperature index. Should the customer require lifetime predictions this should be
demonstrated based on the temperature index of the product as supplied by the manufacturer.
The maximum temperature for short circuit conditions is 160 °C based on 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. These requirements are specified to permit the cables to satisfy Hazard Level 3 of EN 45545-1
and EN 45545-2.
prEN 50306-4:2014 has to be used in conjunction with prEN 50306-1:2018, General requirements,
prEN 50306-2:2018, Single core cables, and prEN 50306-3:2018, Single core and multicore cables.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 45545-1, Railway applications - Fire protection on railway vehicles - Part 1: General
EN 50264-1, Railway applications - Railway rolling stock power and control cables having special fire
performance - Part 1: General requirements
EN 50305:2002, Railway applications - Railway rolling stock cables having special fire performance -
Test methods
prEN 50306-1:2018, Railway applications-Railway rolling stock cables having special fire performance
- Thin wall - Part 1: General requirements
prEN 50306-2:2018, Railway applications - Railway rolling stock cables having special fire
performance - Thin wall - Part 2: Single core cables
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prEN 50306-4:2018 (E)
prEN 50306-3:2018, Railway applications - Railway rolling stock cables having special fire
performance - Thin wall Part 3: Single core and multicore cables screened and thin wall sheathed
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
EN 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
EN 61034-2, Measurement of smoke density of cables burning under defined conditions - Part 2: Test
procedure and requirements
EN 60811 (all parts), Common test methods for insulating and sheathing materials of electric cables
3 Multicore cables - sheathed
3.1 General
The completed cables shall conform to the applicable general requirements given in
prEN 50306-1:2018 and to the specific requirements of Clause 3 and Clause 4.
Conformity with the requirements shall be checked by inspection and by the tests given in Table 2.
3.2 Marking and code designation
3.2.1 Marking of cable
Cables shall be marked with the following:
• Manufacturer's name;
• EN reference;
• table number;
• cable class (P or E);
• Voltage rating (UO);
• No. of cores and conductor size;
• A code designation according for use of the cable (see 3.2.2);
• Conductor temperature rating
For example:
XYZ EN 50306-4 1E 300 V 2x1,5 MM 90
The marking shall conform to the requirements of Clause 5 of prEN 50306-1:2018.
3.2.2 Code Designation
The following letters shall be used as a code to identify the suitability of a particular cable for use
under one of the Hazard Levels of EN 45545-1, and to indicate performance levels relating to low
temperature and to oil and fuel resistance:
NOTE For sheathed cables two letters are required, one for the insulation and one for the sheath.
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Hazard Level EN 45545-1 HL3
- low temperature / oil resistance C
- extra low temperature / oil resistance F
- low temperature / extra oil and fuel resistance J
- extra low temperature / extra oil and fuel resistance M
For sheathed cables two letters are required, one for the insulation and one for the sheath
3.2.3 Marking on the insulation of cores
The cores shall be marked 1, 2, etc., in accordance with the requirements given in 3.3.1 of
prEN 50306-2:2018.
However, the core number one may be marked as the relevant single core in accordance with the
requirements of 3.3.1 of prEN 50306-2:2018.
3.3 Rated voltage
The rated voltage recognized for the purposes of this standard shall be U /U = 300V / 500V
o
NOTE See EN 50355 and 50343 for further information.
3.4 Construction
3.4.1 Cores
Each insulated single core shall conform to the requirements given in prEN 50306-2:2018.
3.4.2 Laying-up of cores
The cores shall be twisted together.
The pitch of lay for the cores shall not be greater than 20 times the diameter of the laid up cores in the
cable.
3.4.3 Sheath
The sheath shall be a compound of type EM 101 to EM 104, and shall be applied by extrusion.
Compounds type EM 101 to EM 104 together with their requirements are defined in EN 50264-1.
The sheath shall be smooth and uniformly applied; the application shall ensure that cables with a class
E sheath are substantially circular. The thickness of sheath shall conform to the specified value given
in Table 1 according to the class.
The sheath colour shall be black, unless otherwise specified.
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Table 1 — Requirements for construction of multicore cables - sheathed
1 2 3 4 5 6 7
Number of Cables class E Cables class P
cores and Average Overall diameter Minimum Overall diameter
nominal Minimum thickness
cross-section thickness of of sheath
sheath
at any point
of the
conductor min. max. min. max.
2
mm mm mm mm mm mm mm
2 × 0,5 1,0 4,90 5,90 0,42 3,5 4,5
3 × 0,5 1,0 5,10 6,10 0,42 3,8 4,8
4 × 0,5 1,0 5,5 6,5 0,42 4,1 5,3
7 × 0,5 1,0 6,3 7,3 0,42 4,9 6,1
13 × 0,5 1,0 8,3 9,3 0,56 7,3 8,5
19 × 0,5 1,0 9,0 10,2 0,56 8,1 9,3
37 × 0,5 1,0 12,3 13,5 0,56 10,8 12,2
2 × 0,75 1,0 5,30 6,30 0,42 4,0 5,0
3 × 0,75 1,0 5,50 6,50 0,42 4,2 5,2
4 × 0,75 1,0 6,0 7,0 0,42 4,6 5,8
7 × 0,75 1,0 6,9 7,9 0,42 5,5 6,6
13 × 0,75 1,0 9,1 10,3 0,56 8,2 9,4
19 × 0,75 1,0 10,0 11,2 0,56 9, 10,4
37 × 0,75 1,0 13,2 14,4 0,56 12,2 13,6
48 × 0,75 1,0 14,8 16,4 0,56 13,9 15,7
2 × 1,0 1,0 5,6 6,6 0,42 4,3 5,3
1,0 5,9 6,9 0,42 4,6 5,6
3 × 1,0
1,0 6,3 7,3 0,42 4,9 6,1
4 × 1,0
7 × 1,0 1,0 7,3 8,3 0,42 6,0 7,2
13 × 1,0 1,0 9,7 10,9 0,56 8,7 10,1
19 × 1,0 1,0 10,7 11,9 0,56 9,8 11,2
37 × 1,0 1,0 14,0 15,6 0,56 13,3 14,7
2 × 1,5 1,0 6,3 7,3 0,42 5,0 6,0
6,6 7,6 0,42 5,3 6,3
3 × 1,5 1,0
7,4 8,4 0,42 6,0 7,2
4 × 1,5
1,0
7 × 1,5 1,0 8,6 9,8 0,56 7,7 8,9
13 × 1,5 1,0 11,7 12,9 0,56 10,7 12,1
19 × 1,5 1,0 13,0 14,2 0,56 12, 13,4
37 × 1,5 1,0 17,2 18,8 0,56 16,2 18,
2 × 2,5 1,0 7,7 8,7 0,56 6,7 7,9
3 × 2,5 1,0 8,1 9,1 0,56 7,7 8,3
4 × 2,5 1,0 8,8 10,0 0,56 7,9 9,1
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For other compositions (number of cores), insulation and sheath thicknesses shall follow in principle
the value mentioned in the Table 1 or ask the manufacturer for adequate technical design depending
on the application requirements. The cable marking shall keep the standard name as
prEN 50306-4:2018.
4 Tests
4.1 Definitions relating to tests
The definition of Type (T), Sample (S) and Routine (R) tests is as given in Clause 3 of
prEN 50306-1:2018.
NOTE 1 Tests classified as Sample (S) or Routine (R) may be required as part of any approval schemes.
NOTE 2 Annex A gives guidance on the selection of cables for type approval.
4.2 Voltage test on cable
The test shall be carried out in accordance with 6.2.1 of EN 50305:2002, using an a.c. or d.c. voltage
and the following conditions:
- sample length 20 m
- voltage (a.c.) 2 kV
- voltage (d.c.) 4,8 kV
- duration of application 5 min
- test temperature (20 ± 5) °C
At the conclusion of the test there shall be no breakdown of the insulation.
4.3 Tests at low temperature
a) Bending
The test shall be carried out at (- 40 ± 2) °C in accordance with EN 60811-504.
At the conclusion of the test there shall be no cracks in the sheath.
NOTE Where cables sheaths are not to be used at extra low temperature, the test may be carried out at (-
25 ± 2) °C.
b) Elongation
The test shall be carried out at (- 40 ± 2) °C in accordance with EN 60811-505.
The elongation of the sheath shall be not less than 30 %.
NOTE Where cables sheaths are not to be used at extra low temperatures, the test may be carried out at (-
25 ± 2) °C.
c) Impact
The test shall be carried out at (- 25 ± 2) °C in accordance with 5.1 of EN 50305:2002.
At the conclusion of the test there shall be no cracks in the inside or the outside of the sheath, nor on
the outside of the insulation.
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4.4 Ozone resistance of sheath
The test shall be carried out either in accordance with EN 60811-403 (for Method A) or 7.4.2 of
EN 50305:2002 (for Method B), using the following conditions:
NOTE The choice of Method A or Method B may be made by the supplier.
Method A:
−4
concentration (%) (250 to 300) × 10
test temperature (25 ± 2) °C
test duration 24 h
test requirements no cracks
Method B:
−6
concentration (%) (200 ± 50) × 10
test temperature (40 ± 2) °C
relative humidity (%) 55 ± 5
test duration 72 h
test requirements no cracks
4.5 Compatibility
The test shall be carried out in accordance with 7.1 of EN 50305:2002. Cable shall be aged for 7 days
at the following temperatures:
(100 ± 2) °C for cables with a designated operating temperature of 90 °C;
Test requirement:
– tensile strength variation ±30 % maximum
– elongation at break variation ±30 % maximum
4.6 Reaction to fire
The completed cable shall conform to the requirements given in 8.1, 8.2.1, 8.2.2 or 8.2.3 (depending
upon overall diameter) and 8.3 of prEN 50306-1:2018.
The sheath shall conform to the requirements of Clause 9 of prEN 50306-1:2018.
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Table 2 — Schedule of tests for multicore cables - sheathed
1 2 3 4 5 6
Ref Test Category Test method given in Requirement
No of test EN (Sub)clause given in
a
1 Electrical tests
EN 50306-2, Table 1
1.1 Electrical resistance of conductors T,S 50305 6.1
4.2
1.2 Voltage test on complete cable T,S 50305 6.2.1
2 Provisions covering constructional
and dimensional characteristics
3.4 and EN 50306-1, 6
2.1 Checking of conformity and constructional T,S 50306–1 Inspection
provisions
2.2 Sheath:
EN 50306-1, 6.6.2
(a) Application S 50306–1 Inspection &
manual test
Table 1
(b) Thickness T,S 50306–1 A.2
Table 1
2.3 Overall diameter T,S 50306–1 6.7
3.2.3 and 3.2.4
2.4 Identification and marking T,S 50306–4 Inspection &
measuremen
t
EN 50306-1, 5.3
2.5 Durability of identification T,S 50305 10.1
3 Tests of sheath material
3.1 Mechanical properties of sheath in state T,S 60811–501 9.2
as delivered
EN 50264-1, Table 4
3.2 Tests at low temperature
4.3(a)
Bending (diameter ≤ 12,5 mm) T 60811–504 8.2
4.3(b)
Elongation (diameter > 12,5 mm) T 60811–505 8.4
4.3(c)
Impact resistance T 50305 5.1
4.4
3.3 Ozone resistance T 50305 7.4.2
EN 50264-1, Table 4
3.4 Water absorption (Gravimetric) T 60811–402
4.5
3.5 Compatibility test T 50305 7.1
4 Reaction to fire
4.1 Flame propagation
4.6 and EN 50306-1, 8.1
single cable T,S 60332–1-2 -
4.13 and
bunched cable (diameters ≥ 12 mm) T 60332–3- -
EN 50306-1, 8.2.1
24
4.6 and
bunched cable T 50305 9.1.1
EN 50306-1, 8.2.2
(diameters > 6 mm < 12 mm)
4.6 and
bunched cable (diameters ≤ 6mm) T 50305 9.1.2
EN 50306-1, 8.2.3
4.2 Halogen-Free / Determination of halogens – T 50305 Annex: F
Elemental test and G
4.6 and EN 50306-1, 8.3
4.3 Smoke emission T 61034–2 -
4.6 and EN 50306-1, 9
4.4 Toxicity of sheath T 50305 9.2
a
According to EN 50306-4 unless otherwise specified.
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5 Multicore cables - screened and
...
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