EN 50620:2017

Electric cables - Charging cables for electric vehicles

This standard specifies design, dimensions and test requirements for halogen-free cables with extruded insulation and sheath having a voltage rating of up to and including 450/750 V for flexible applications under severe condition for the power supply between the electricity supply point or the charging station and the vehicle. The EV charging cable is intended to supply power and if needed communication (details see IEC 61851 series and IEC 62196 series) to an electric vehicle. The charging cables are applicable for charging modes 1-3 of IEC 61851-1. Cables with rated voltage 300/500 V are only permitted for charging mode 1 of IEC 61851-1. The maximum conductor operating temperatures for the cables in this standard is 90°C. The cables may be a) an integral part of the vehicle (case A of IEC 61851-1), or b) a detachable cable assembly with a vehicle connector and AC supply connection to a socket outlet (case B of IEC 61851-1), or c) permanently attached to a fixed charging point (case C of IEC 61851-1). This standard describes cables whose safety and reliability is ensured when they are installed and/or used in accordance to the guide to use EN 50565-1 and ANNEX B.

Kabel und Leitungen - Ladeleitung für Elektrofahrzeuge

Diese Norm legt Aufbauten, Abmessungen und Prüfanforderungen von halogenfreien Leitungen mit extrudierter Isolierhülle und Mantel fest, die für Nennspannungen bis einschließlich 450/750 V ausgelegt sind. Die Leitung ist bestimmt für den flexiblen Einsatz bei schwerer Beanspruchung zwischen Netz oder Ladestation und dem Fahrzeug. Die Ladeleitung ist bestimmt für die Übertragung von Energie und gegebenenfalls zur Datenübertragung (näheres siehe Reihe IEC 61851 und Reihe IEC 62196) zum Elektrofahrzeug. Die Ladeleitungen sind geeignet für die Lademodi 1-3 nach IEC 61851 1. Für Ladeleitungen mit einer Nennspannung von 300/500 V ist ausschließlich die Ladebetriebsart 1 nach IEC 61851 1 zulässig. Die maximale Betriebstemperatur am Leiter für die in dieser Norm behandelten Leitungen beträgt 90 °C. Die Leitungen können a) ein fest eingebauter Bestandteil des Fahrzeuges sein (Fall A von EN 61851-1, oder b) eine lösbaren Ladeleitungsgarnitur mit Fahrzeugkupplungen am Fahrzeug und einem Wechsel-stromversorgungsanschluss an einer Steckdose (Fall B von EN 61851-1), oder c) fest an der Ladestation angebracht sein (Fall C von EN 61851-1). Die Sicherheit und Zuverlässigkeit der in dieser Norm beschriebenen Leitungen ist sichergestellt, wenn diese nach EN 50565-1 und Anhang B dieser Norm installiert und betrieben werden.

Câbles électriques - Câbles de charge pour véhicules électriques

La présente norme spécifie la conception, les dimensions et les exigences d’essai pour les câbles sans halogène avec isolation et gaine extrudées, ayant une tension assignée jusqu’à 450/750 V inclus pour des applications souples dans des conditions sévères, assurant l’alimentation entre le point de fourniture de l'énergie électrique ou la borne de charge et le véhicule électrique (VE). Le câble de charge pour VE est destiné à assurer l’alimentation électrique d'un véhicule électrique, et si nécessaire, la communication avec celui-ci (pour plus de détails, voir l’EN 61851 et la série EN 62196). Les câbles de charge sont applicables pour les modes de charge 1-3 de l’EN 61851-1. Les câbles décrits dans la présente norme ayant une tension assignée de 300/500 V sont uniquement autorisés pour le mode de charge 1 de l’EN 61851-1. La température maximale de fonctionnement du conducteur pour les câbles de cette norme est 90 °C. Les câbles peuvent être a) partie intégrante du véhicule (cas A de l'EN 61851 1); ou b) un faisceau de câbles non fixé à demeure avec un connecteur de véhicule et le raccordement d’alimentation à courant alternatif à un socle de prise de courant (cas B de l'EN 61851 1); ou c) reliés en permanence à un point de charge fixe (case C of EN 61851 1) La présente norme décrit des câbles dont la sécurité et la fiabilité sont assurées lorsqu’ils sont installés et utilisés conformément au guide d’utilisation de l’EN 50565-1 et de l’Annexe B.

Električni kabli - Kabli za napajanje električnih vozil

Ta standard določa zasnovo, mere in preskusne zahteve za kable brez halogenov z ekstrudirano izolacijo in plaščem z nazivno napetostjo največ 450/750 V za prilagodljive načine uporabe v zahtevnih pogojih za električno napajanje med točko napajanja ali polnilno postajo in električnim vozilom (EV).
Napajalni kabel električnega vozila je namenjen za napajanje in komunikacijo (za podrobnosti glej standard EN 61851-1 in skupino standardov EN 62196) z električnim vozilom, če je ta potrebna. Napajalni kabli se uporabljajo za napajalne načine 1–3 standarda EN 61851-1. Kabli iz tega standarda z nazivno napetostjo 300/500 V so dovoljeni samo za napajalni način 1 v standardu EN 61851-1.
Najvišja delovna temperatura kabelskega vodnika v tem standardu je 90 °C.
Kabli so lahko:
a) sestavni del vozila (primer A v standardu EN 61851-1); ali
b) snemljivi kabelski sklop s konektorjem vozila in priključek za izmenični tok z izhodno vtičnico (primer B v standardu EN 61851-1); ali
c) trajno nameščeni na fiksno napajalno točko (primer C v standardu EN 61851-1).
Ta standard opisuje kable, katerih varnost in zanesljivost je zagotovljena, ko so napeljani in/ali uporabljeni v skladu z vodnikom za uporabo, s standardom EN 50565-1 in dodatkom B.

General Information

• Status: Published
• Publication Date: 11-May-2017
• ICS: 29.060.20 - Cables
• Technical Committee: CLC/TC 20 - Electric cables
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Start Date: 25-Sep-2019
• Completion Date: 23-Sep-2025
• Directive: 2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Mandate: M/468 - Standardisation mandate addressed to CEN and CENELEC and ETSI concerning the charging of electric vehicles
• Mandate: M/490 - Standardisation mandate to the European Standardisation Organisations (ESOs) to support European Smart Grid deployment
• Mandate: M/511 - Mandate to CEN, CENELEC and ETSI relating to harmonised standards in the field of the Low Voltage Directive
• Ref Project: SIST EN 50620:2017 - Electric cables - Charging cables for electric vehicles

Relations

• Amended By: EN 50620:2017/A1:2019 - Electric cables - Charging cables for electric vehicles
• Effective Date: 26-Jan-2023
• Amended By: EN 50620:2017/A2:2024 - Electric cables - Charging cables for electric vehicles
• Effective Date: 26-Jan-2023

Overview - EN 50620:2017 (EV charging cables)

EN 50620:2017 (CLC) defines design, dimensions and test requirements for halogen‑free charging cables for electric vehicles (EVs). It covers flexible cables with extruded insulation and sheath, rated up to and including 450/750 V for severe‑duty applications supplying power (and where required, communication) between the electricity supply point or charging station and the vehicle. The standard applies to charging modes 1–3 of EN/IEC 61851‑1; 300/500 V cables are permitted only for Mode 1. Maximum conductor operating temperature is 90 °C. Cables may be: integral to the vehicle (Case A), detachable assemblies (Case B) or permanently attached to fixed charging points (Case C).

Key topics and technical requirements

• Scope & rated voltages: Clear limits for U0/U ratings (up to 450/750 V) and mode‑specific allowances (300/500 V → Mode 1 only).
• Halogen‑free materials: Requirements for insulation (EVI) and sheathing (EVM) compounds to limit halogen emissions and improve safety in fire.
• Construction and dimensions: Conductor materials, core sizes, insulation thickness, core identification and overall cable dimensional limits.
• Temperature rating: Maximum conductor operating temperature of 90 °C.
• Marking & traceability: Origin, continuous marking, code designation and durability/legibility requirements.
• Mechanical & environmental tests: Type/routine/sample tests addressing cold impact, bending, tensile/elongation, thermal ageing, oil/chemical resistance, UV/weathering and spark/safety tests.
• Compatibility & functional cores: Provision for control pilot (CP) and control/communication cores (CC) as used with EN/IEC 61851 and EN/IEC 62196 interfaces.
• Installation guidance: Safety and reliability when installed/used in accordance with EN 50565‑1 and Annex B of EN 50620.

Applications - who uses EN 50620 and why

• Cable manufacturers designing and certifying EV charging leads and fixed charging point cables.
• EVSE (charging station) and OEMs selecting compatible, tested cables for vehicles and public/private chargers.
• Testing laboratories performing type, sample and routine tests per the standard.
• Installers, fleet operators and regulators ensuring installed cables meet safety, marking and environmental resistance expectations for public and commercial charging infrastructure.
• Practical uses: detachable charge leads, tethered cables on wallboxes, in‑vehicle charging cords and heavy‑duty flexible supply cables for charging stations.

Related standards

• EN/IEC 61851‑1 (Electric vehicle conductive charging systems)
• EN/IEC 62196 series (Connectors and sockets)
• EN 50565‑1 (Guide to use-installation/selection)
• EN 50525‑1, EN 60228 and relevant EN/IEC test method standards referenced in EN 50620

Keywords: EN 50620:2017, EV charging cable standard, halogen‑free charging cable, 450/750 V EV cable, charging modes 1‑3, EVSE cable testing, EN 61851, EN 62196.

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2017
(OHNWULþQLNDEOL.DEOL]DQDSDMDQMHHOHNWULþQLKYR]LO
Electric cables - Charging cables for electric vehicles
Kabel und Leitungen - Ladeleitung für Elektrofahrzeuge
Câbles électriques - Câbles de charge pour véhicules électriques
Ta slovenski standard je istoveten z: EN 50620:2017
ICS:
29.060.20 Kabli Cables
43.120 (OHNWULþQDFHVWQDYR]LOD Electric road vehicles
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 50620
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2017
ICS 29.060.20
English Version
Electric cables - Charging cables for electric vehicles
(BT(DE/NOT)259)
Câbles électriques - Câbles de charge pour véhicules Kabel und Leitungen - Ladeleitung für Elektrofahrzeuge
électriques (BT(DE/NOT)259)
(BT(DE/NOT)259)
This European Standard was approved by CENELEC on 2016-06-27. 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, 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.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50620:2017 E
Contents Page
European foreword . 4
1 Scope . 5
2 Normative references. 5
3 Terms and definitions . 7
4 Rated voltage . 8
5 Marking . 8
5.1 Indication of origin . 8
5.2 Continuity of marking . 8
5.3 Use of the name CENELEC . 9
5.4 Code designation . 9
5.5 Additional voluntary marking . 9
5.6 Additional requirements . 10
5.6.1 Durability . 10
5.6.2 Legibility . 10
6 Requirements for the construction of cables . 10
6.1 Conductors . 10
6.1.1 Material . 10
6.1.2 Electrical resistance . 10
6.2 Sizes of cable . 10
6.3 Insulation . 10
6.3.1 Material . 10
6.3.2 Application to the conductor . 10
6.3.3 Thickness . 11
6.3.4 Core identification . 11
6.4 Assembly of cores . 12
6.5 Other components . 12
6.5.1 General. 12
6.5.2 Interstitial fillers . 12
6.6 Sheath . 13
6.6.1 Material . 13
6.6.2 Application . 13
6.6.3 Thickness . 13
6.6.4 Colour . 14
7 Requirements . 14
Annex A (normative) Requirements for compatibility test . 25
A.1 Conditions . 25
A.2 Requirements . 25
Annex B (informative)  Guide to use (future amendment EN 50565) . 26
Annex C (normative) Cold impact test . 27
Annex D (normative) Resistance against chemicals . 28
Annex E (informative) Current ratings . 29
Annex F (normative) Weathering/UV resistance test . 30
Bibliography . 31
Tables
Table 1 - Examples of maximum permitted voltages against rated voltage of cable . 8
Table 2 — Requirements for halogen free insulation compounds. 15
Table 3 — Requirements for halogen free sheathing compounds. 16
a
Table 4a — Dimensional and insulation resistance values of H05BZ5-F and H07BZ5-F . 18
a
Table 4b — Dimensional and insulation resistance values of H05BZ6-F and H07BZ6-F . 19
Table 5 — Tests for complete cable . 20
Table A.1 — Requirements . 25
Table B.1 - Constructional details and limiting conditions . 26
Table C.1 — Parameter for cold impact . 27
Table D.1 — List of test media . 28
Table E.1 - Current rating for flexible cable for Mode 1 charging only (300/500 V) . 29
Table E.2 - Current rating for flexible cable for Mode 2 and 3 charging (450/750V) . 29
Figures
Figure 1 — Example of marking . 9
European foreword
This document (EN 50620:2017) has been prepared by CLC/TC 20, Electric cables.
The following dates are fixed:
• latest date by which this document has (dop) 2017-11-12
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2020-05-12
standards conflicting with this
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
This document has been prepared under a mandate given to CENELEC by the European Commission
and the European Free Trade Association.
1 Scope
This standard specifies design, dimensions and test requirements for halogen-free cables with
extruded insulation and sheath having a voltage rating of up to and including 450/750 V for flexible
applications under severe condition for the power supply between the electricity supply point or the
charging station and the electric vehicle (EV).
The EV charging cable is intended to supply power and if needed communication (details see
EN 61851-1 and the EN 62196 series) to an electric vehicle. The charging cables are applicable for
charging modes 1-3 of EN 61851-1. The cables in this standard with rated voltage 300/500 V are only
permitted for charging mode 1 of EN 61851-1.
The maximum conductor operating temperatures for the cables in this standard is 90 °C.
The cables may be:
a) an integral part of the vehicle (case A of EN 61851-1); or
b) a detachable cable assembly with a vehicle connector and AC supply connection to a socket
outlet (case B of EN 61851-1); or
c) permanently attached to a fixed charging point (case C of EN 61851-1).
This standard describes cables whose safety and reliability is ensured when they are installed and/or
used in accordance to the guide to use EN 50565-1 and Annex B.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
EN 228, Automotive fuels — Unleaded petrol — Requirements and test methods
EN 590, Automotive fuels — Diesel — Requirements and test methods
EN 50289-1-5:2001, Communication cables — Specifications for test methods — Part 1-5: Electrical
test methods - Capacitance
EN 50289-4-17, Communication cables — Specifications for test methods — Part 4-17: Test methods
for UV resistance evaluation of the sheath of electrical and optical fibre cable
EN 50334, Marking by inscription for the identification of cores of electric cables
EN 50395:2005, Electrical test methods for low voltage energy cables
EN 50396:2005, Non electrical test methods for low voltage energy cables
EN 50525-1:2011, Electric cables — Low voltage energy cables of rated voltages up to and including
450/750 V (U0/U) — Part 1: General requirements
EN 60228, Conductors of insulated cables (IEC 60228)
EN 60332-1-2:2004/A1:2015, 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 60332-1-2:2004/A1:2015)
EN 60719, Calculation of the lower and upper limits for the average outer dimensions of cables with
circular copper conductors and of rated voltages up to and including 450/750 V (IEC 60719)
EN 60811-401, Electric and optical fibre cables — Test methods for non-metallic materials — Part
401: Miscellaneous tests — Thermal ageing methods — Ageing in an air oven (IEC 60811-401)
EN 60811-403, Electric and optical fibre cables — Test methods for non-metallic materials — Part
403: Miscellaneous tests — Ozone resistance test on cross-linked compounds (IEC 60811-403)
EN 60811-404, Electric and optical fibre cables — Test methods for non-metallic materials — Part
404: Miscellaneous tests — Mineral oil immersion tests for sheaths (IEC 60811-404)
EN 60811-501, Electric and optical fibre cables — Test methods for non-metallic materials — Part
501: Mechanical tests — Tests for determining the mechanical properties of insulating and sheathing
compounds (IEC 60811-501)
EN 60811-503, Electric and optical fibre cables — Test methods for non-metallic materials — Part
503: Mechanical tests — Shrinkage test for sheaths (IEC 60811-503)
EN 60811-504, Electric and optical fibre cables — Test methods for non-metallic materials — Part
504: Mechanical tests — Bending tests at low temperature for insulation and sheaths (IEC 60811-504)
EN 60811-505, Electric and optical fibre cables — Test methods for non-metallic materials — Part
505: Mechanical tests — Elongation at low temperature for insulations and sheaths (IEC 60811-505)
EN 60811-506, Electric and optical fibre cables — Test methods for non-metallic materials — Part
506: Mechanical tests — Impact test at low temperature for insulations and sheaths (IEC 60811-506)
EN 60811-507, Electric and optical fibre cables — Test methods for non-metallic materials — Part
507: Mechanical tests — Hot set test for cross-linked materials (IEC 60811-507)
EN 60811-508, Electric and optical fibre cables — Test methods for non-metallic materials — Part
508: Mechanical tests — Pressure test at high temperature for insulation and sheaths (IEC 60811-
508)
EN 60811-509, Electric and optical fibre cables — Test methods for non-metallic materials — Part
509: Mechanical tests — Test for resistance of insulations and sheaths to cracking (heat shock test)
(IEC 60811-509)
EN 61851-1, Electric vehicle conductive charging system — Part 1: General requirements (IEC 61851-
1)
EN 62230, Electric cables — Spark-test method (IEC 62230)
HD 308 S2, Identification of cores in cables and flexible cords
HD 605 S2:2008, Electric cables — Additional test methods
ISO 48, Rubber, vulcanized or thermoplastic — Determination of hardness (hardness between 10
IRHD and 100 IRHD)
ISO 14572:2011, Road vehicles — Round, sheathed, 60 V and 600 V screened and unscreened
single- or multi-core cables — Test methods and requirements for basic- and high-performance cables
ISO 22241-1, Diesel engines — NOx reduction agent AUS 32 — Part 1: Quality requirements
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
type test
T
test 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 1 to entry: Type 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.
3.2
sample test
S
test made on samples of completed cable, or components taken from a completed cable adequate to
verify that the finished product meets the design specifications
3.3
routine test
R
tests made on all production cable lengths to demonstrate their integrity
3.4
halogen-free material
when used in cables designated halogen-free, material complying with the assessment of halogen
requirements in Table 5
3.5
type of compound
category in which a compound is placed according to its properties, as determined by specific tests
Note 1 to entry: The type designation is not directly related to the composition of the compound.
3.6
EVI
insulation compound for cables in this standard
3.7
EVM
sheathing compound for cables in this standard
3.8
CP core
control pilot core
core in the cable which serve the basic control function to operate a charging cable
Note 1 to entry: For further information see EN 61851-1.
3.9
CC
control core
core in the cable for additional control and measurement functions
4 Rated voltage
The rated voltage of a cable is the reference voltage for which the cable is designed.
The rated voltage in an alternating current system, is expressed by the combination of two values
U0/U, expressed in volts, where:
a) U0 is the r.m.s. value between any insulated conductor and “earth” (metal covering of the cable or
the surrounding medium);
b) U is the r.m.s. value between any two phase conductors of a multicore cable or of a system of
single core cables.
In an alternating current system, the rated voltage of a cable or cord shall be at least equal to the
nominal voltage of the system for which it is intended. This condition applies to the values of both U0
and U.
The operating voltage of a system may permanently exceed the nominal voltage of the system. The
maximum permanent permitted operating voltage of the cable is stated in Table 1.
Table 1 — Examples of maximum permitted voltages against rated voltage of cable
Rated voltage of cable Maximum permanent permitted
operating voltage of the cable
a.c. 3-phase a.c.
U /U Conductor- Conductor-
earth conductor
V U max (V) U max (V)
300/500 320 550
450/750 480 825
5 Marking
5.1 Indication of origin
Cables shall be provided with an identification of origin consisting of:
a) either the manufacturer’s identification thread;
b) or the continuous marking of the manufacturer’s name or his trademark, or (if legally protected)
his identification number, by one of the three following methods:
1) printed tape within the cable;
2) printing, indenting or embossing on the insulation of at least one core. Any core may be
chosen;
3) printing, indenting or embossing on the sheath.
5.2 Continuity of marking
Each specified marking 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 sheath of the cable;
b) 275 mm if the marking is:
1) on the insulation of a sheathed cable;
2) on a tape within a sheathed cable.
NOTE A “Specified Marking” is any marking that is prescribed as a normative requirement by this EN.
Other marking, such as that required under recognized voluntary third party approval schemes, may
also follow the requirements of this subclause.
Figure 1 shows an example of the marking as used on the outer sheath of the cable.

Figure 1 — Example of marking
5.3 Use of the name CENELEC
The name CENELEC, in full or abbreviated, shall not be marked on, or in the cables.
5.4 Code designation
Each cable shall have its full code designation according to requirements in this standard marked
continuously (see 5.2) on the sheath:
— EVC (Electric Vehicle Cable);
— code designation: H05BZ5-F or H05BZ6-F or H07BZ5-F or H07BZ6-F;
— number and nominal cross section of power cores;
— additional core(s) (CC and/or CP) with number and nominal cross section, if any;
— rated voltage;
— number of cable standard.
EXAMPLE For code designation: EVC H07BZ5-F 5 × 6 + 2x0,5 450/750 V EN 50620
5.5 Additional voluntary marking
Additional markings, for example the year of manufacture, are permitted, but are not requirements of
this standard. If an additional marking is applied it shall neither conflict nor interfere with the required
markings in 5.1 and 5.4. Any additional voluntary marking shall be throughout the length of the cable,
and shall be on the external surface of the cable.
Such markings, which are permitted to be applied on the same line as the obligatory marking, or on an
additional line, shall be repeated at intervals not exceeding 1 100 mm.
5.6 Additional requirements
5.6.1 Durability
Printed markings shall be durable. Compliance with this requirement shall be checked by the test
given in EN 50396:2005, 5.1.
5.6.2 Legibility
All markings shall be legible.
The colours of the identification threads shall be easy to recognize or easily made recognizable, if
necessary by cleaning with any permitted safe petroleum-based solvent.
6 Requirements for the construction of cables
6.1 Conductors
6.1.1 Material
The conductors shall be class 5 flexible copper conductors in accordance with EN 60228.
The wires of conductors shall be plain or metal coated, for example with tin or silver. Coated wires
shall be covered with a continuous layer of the coating. There shall be no visible gaps in the
continuous layer, when examined with normal or corrected vision.
6.1.2 Electrical resistance
The resistance of each conductor at 20 °C shall be in accordance with the requirements of EN 60228.
Compliance shall be checked by the test given in EN 50395:2005, Clause 5.
6.2 Sizes of cable
The sizes of cable shall be:
2 2
— power cores 300/500 V – 1,5 mm and 2,5 mm - 3 core;
2 2 2
— power cores 450/750 V – 1,5 mm 3 core and 2,5 mm to 35 mm - 3, 4 and 5 core;
2 2
— CC/CP cores– 0,5 mm and 1,0 mm - number of cores not specified.
6.3 Insulation
6.3.1 Material
The insulation shall be halogen-free compound EVI-2 for power cores, and EVI-1 or EVI-2 for CC/CP
cores.
In all cases the insulation shall meet the requirements given in Table 2.
6.3.2 Application to the conductor
The insulation shall be applied by extrusion, such that it fits closely on the conductor, but it shall be
possible to remove it without damage to the insulation itself, to the conductor or to the metal coating, if
present. It is permitted to apply the insulation in a single layer, or in a number of coherent layers.
Where more than one layer is used, all testing shall be carried out on the complete insulation as
though it were a single layer.
NOTE Insulation applied in more than one layer does not conform to the definition of “double insulation”
given, for instance, in HD 60364.
Compliance shall be checked by inspection and by manual test.
6.3.3 Thickness
The mean value of the thickness of insulation of the power cores shall be not less than the specified
value for each size of cable shown in the Table 4a and 4b.
However, the thickness at any place may be less than the specified value provided that the difference
does not exceed 0,1 mm + 10 % of the specified value.
Compliance shall be checked by the test given in EN 50396:2005, 4.1.
For CP/CC cores the minimum wall thickness at any point shall not be less than 0,33 mm.
6.3.4 Core identification
6.3.4.1 General
Each power core in the cable shall be identified by colour, see 6.3.4.2.
Each control and/or pilot core (CP/CC) in the cable shall be identified either by colour, see 6.3.4.2 or
numbering, see 6.3.4.3.
6.3.4.2 Core identification by colours
6.3.4.2.1 General requirements
Identification of the cores of a cable shall be achieved by the use of coloured insulation or by a
coloured surface like in EN 50525-1:2011.
Each core of a cable shall have only one colour, except the core identified by a combination of the
colours green-and-yellow.
The green-and-yellow core, if any, shall comply with the requirement of 6.3.4.3.
The colours green and yellow, when not in combination, shall not be used for any multicore cable.
6.3.4.2.2 Colour scheme
Colour scheme for power cores shall be in accordance with HD 308 S2:
— three-core cable: green-and-yellow, blue, brown;
— four-core cable: green-and-yellow, brown, black, grey;
— five-core cable: green-and-yellow, blue, brown, black, grey.
The colours of pilot and/or control cores shall be clearly indentified and different to the power cores.
The colours shall be clearly identifiable and durable. Durability shall be checked by the test given in
EN 50396:2005, 5.1.
6.3.4.2.3 Colour combination green-and-yellow
The combination of the colours green-and-yellow shall be such that, on any 15 mm length of the core,
one of these colours covers at least 30 % and not more than 70 % of the surface of the core, the other
colour covering the remainder of that surface.
NOTE This requirement is in accordance with EN 60445.
Compliance shall be checked using one of the test methods in EN 50396:2005, 5.2.
6.3.4.3 Core identification by numbers for control, pilot (CC,CP) cores
6.3.4.3.1 General requirements
The insulation of the cores shall be of the same colour and numbered sequentially.
The numbering shall start by number 1.
The numbers shall be printed in arabic numerals on the outer surfaces of the cores. All the numbers
shall be of the same colour, which shall contrast with the colour of the insulation. The numerals shall
be legible.
6.3.4.3.2 Preferred arrangement of marking
The numbers shall be repeated, at regular intervals along the core in accordance with the axial
arrangement described in EN 50334.
6.3.4.3.3 Durability
Printed numerals shall be durable. Compliance with this requirement shall be checked by the test
given in EN 50396:2005, 5.2.
6.4 Assembly of cores
The cores shall be twisted together. A tape may be applied over the core assembly.
A centre-core is not permitted. A c
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