SIST EN 50565-1:2014
(Main)Electric cables - Guide to use for cables with a rated voltage not exceeding 450/750 V - Part 1: General guidance
Electric cables - Guide to use for cables with a rated voltage not exceeding 450/750 V - Part 1: General guidance
EN 50565-1 provides guidance to help installers, cabling designers and end users to understand the characteristics of electric cables, with a rated voltage not exceeding 450/750 V (UNEN-EN 50565-1 provides guidance to help installers, cabling designers and end users to understand the characteristics of electric cables, with a rated voltage not exceeding 450/750 V (U0/U) or equivalent d.c. voltages, so that the cable can be selected, installed and operated in a safe way. It is applicable to those cable types that are specified in EN 50525 (all parts). The guidance given in this European Standard can also be applicable to low-voltage cables of a similar type to those specified in EN 50525 but not specifically mentioned in those standards. In these cases, it is advisable to seek additional advice from the cable manufacturer. Legal or statutory requirements do take precedence over the guidance given in this document./U) or equivalent d.c. voltages, so that the cable can be selected, installed and operated in a safe way. It is applicable to those cable types that are specified in EN 50525 (all parts). The guidance given in this European Standard can also be applicable to low-voltage cables of a similar type to those specified in EN 50525 but not specifically mentioned in those standards. In these cases, it is advisable to seek additional advice from the cable manufacturer. Legal or statutory requirements do take precedence over the guidance given in this document.
Kabel und Leitungen - Leitfaden für die Verwendung von Kabeln und isolierten Leitungen mit einer Nennspannung nicht über 450/750 V - Teil 1: Allgemeiner Leitfaden
Câbles électriques - Guide d’emploi des câbles avec une tension assignée n’excédant pas 450/750 V - Partie 1: Lignes directrices
Električni kabli - Navodilo za uporabo kablov z naznačeno napetostjo, ki ne presega 450/750 V - 1. del: Splošna navodila
Standard EN 50565-1 podaja smernice, ki so inštalaterjem, načrtovalcem kablov in končnim uporabnikom v pomoč pri razumevanju značilnosti električnih kablov z nazivno napetostjo, manjšo od 450/750 V (standard UNEN-EN 50565-1 določa smernice, ki so inštalaterjem, načrtovalcem kablov in končnim uporabnikom v pomoč pri razumevanju značilnosti električnih kablov z nazivno napetostjo, manjšo od 450/750 V (U0/U) ali enakovredno enosmerno napetostjo, zato da lahko kabel izberejo ter varno namestijo in upravljajo). Uporablja se za vrste kablov, določene v standardu EN 50525 (vsi deli). Smernice, podane v tem evropskem standardu, lahko veljajo tudi za nizkonapetostne kable, ki so podobni vrsti kablov, določeni v standardu EN 50525, vendar v teh standardih niso posebej omenjene. V takšnih primerih je priporočljivo poiskati dodatne napotke pri proizvajalcu kabla. Zakonske zahteve imajo prednost pred smernicami, podanimi v tem dokumentu./U) ali enakovredno enosmerno napetostjo, zato da se lahko kabel varno izbere, namesti in upravlja. Uporablja se za vrste kablov, določene v standardu EN 50525 (vsi deli). Smernice, podane v tem evropskem standardu, lahko veljajo tudi za nizkonapetostne kable, ki so podobni vrsti kablov, določeni v standardu EN 50525, vendar v teh standardih niso posebej omenjene. V teh primerih je priporočljivo poiskati dodatne napotke pri proizvajalcu kabla. Zakonske zahteve imajo prednost pred smernicami, določenimi v tem dokumentu.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 50565-1:2014
01-julij-2014
1DGRPHãþD
SIST HD 516 S2:1999
SIST HD 516 S2:1999/A1:2004
SIST HD 516 S2:1999/A2:2009
(OHNWULþQLNDEOL1DYRGLOR]DXSRUDERNDEORY]QD]QDþHQRQDSHWRVWMRNLQH
SUHVHJD9GHO 6SORãQDQDYRGLOD
Electric cables - Guide to use for cables with a rated voltage not exceeding 450/750 V -
Part 1: General guidance
Kabel und Leitungen - Leitfaden für die Verwendung von Kabeln und isolierten Leitungen
mit einer Nennspannung nicht über 450/750 V - Teil 1: Allgemeiner Leitfaden
Câbles électriques - Guide d’emploi des câbles avec une tension assignée n’excédant
pas 450/750 V - Partie 1: Lignes directrices
Ta slovenski standard je istoveten z: EN 50565-1:2014
ICS:
29.060.20 Kabli Cables
SIST EN 50565-1:2014 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 50565-1:2014
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SIST EN 50565-1:2014
EUROPEAN STANDARD
EN 50565-1
NORME EUROPÉENNE
April 2014
EUROPÄISCHE NORM
ICS 29.060.20 Supersedes HD 516 S2:1997 (partially) + A1:2003 (partially) + A2:2008 (partially)
English version
Electric cables -
Guide to use for cables with a rated voltage not exceeding 450/750 V
(U /U) -
0
Part 1: General guidance
Câbles électriques - Kabel und Leitungen -
Guide d’emploi des câbles avec une Leitfaden für die Verwendung von Kabeln
tension assignée n’excédant pas 450/750 und isolierten Leitungen mit einer
V (U /U) - Nennspannung nicht über 450/750 V
0
Partie 1: Lignes directrices (U /U) -
0
Teil 1: Allgemeiner Leitfaden
This European Standard was approved by CENELEC on 2014-02-17. 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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
CENELEC
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
© 2014 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50565-1:2014 E
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Contents Page
Foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Safety . 7
4.1 General . 7
4.2 Selection and installation . 7
4.3 Cables in fixed installations . 8
4.4 Flexible cables . 9
5 Limiting conditions .10
5.1 General .10
5.2 Voltage .10
5.3 Current-carrying capacity .11
5.4 Thermal effects .12
5.5 Fire characteristics .13
5.6 Mechanical stress .13
5.6.1 General .13
5.6.2 Tension .13
5.6.3 Bending .14
5.6.4 Compression .15
5.6.5 Torsion .16
5.7 Compatibility .16
5.8 Dynamic stresses (electromechanical stress) .16
6 Initial and periodic verifications .16
7 Packaging, storage and handling/transportation .16
7.1 Packaging .16
7.2 Storage .16
7.3 Handling/transportation .17
Annex A (informative) Types of usage .18
Annex B (informative) Classes of duty .19
Annex C (informative) Current ratings (copper conductors) .21
Annex D (informative) Duty cycles, current ratings and voltage drop for arc welding cables (copper
conductors) .23
Figure 1 — Definition of internal bending radius .14
Table 1 - Spacing of supports for non-armoured cables in accessible positions . 9
Table 2 — Maximum permitted voltages against rated voltage of cable. .10
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Table 3 — Minimum recommended bending radii at cable temperatures of (20 ± 10) °C . 15
Table C.1 - Current rating for thermoplastic light and ordinary duty flexible cable . 21
Table C.2 - Current rating for cross-linked flexible cable . 21
Table C.3 - Current rating for cross-linked heavy duty flexible cable . 22
Table D.1 — Ambient temperature correction factors . 23
Table D.2 — Current rating for single cycle operation over a maximum period of 5 min . 24
Table D.3 — Current rating for repeat cycle operation based on 5 min repeat period . 24
Table D.4 — Current rating for repeat cycle operation based on a 10 min repeat period . 25
Table D.5 — Voltage drop at normal and elevated temperatures . 25
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Foreword
This document (EN 50565-1:2014) has been prepared by Technical Committee CLC/TC 20, "Electric cables".
The following dates are fixed:
• latest date by which this document has (dop) 2015-02-17
to be implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2017-02-17
• latest date by which the national
standards conflicting with this
document have to be withdrawn
This document together with Part 2 supersedes HD 516 S2:1997.
EN 50565-1:2014 and EN 50565-2:2014 includes the following significant technical changes with respect to
HD 516 S2:1997:
Both parts of EN 50565 refer to cable types specified in EN 50525, replacing the reference to the HD 21 and
HD 22 cable types. Part 1 provides general recommendations and guidance, Part 2 covers specific guidance
for each cable type in EN 50525, like designation, constructional details, recommendations for installation,
conditions and limits of operation, temperature limits and recommended use/suitability.
This standard covers the Principle Elements of the Safety Objectives for Electrical Equipment Designed for
Use within Certain Voltage Limits (LVD - 2006/95/EC).
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.
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Introduction
This European Standard provides guidance for equipment manufacturers, installers and end-users on the
properties of low voltage electric cables, and the limitations that are deemed to be necessary in order to
safeguard life, buildings, and goods. It also gives a reasonable certainty on cable life time expectation relevant
to its application, i.e. the duration of acceptable performance considered as reasonable for a cable used in a
fixed installation for the distribution of electricity in a building is more than that for flexible cable.
It is not possible to cover all the uses that the installers or users may wish to use for a specific type of cable.
The use other than the recommended ones could result in a lowering of safety and/or in a reduction in the
expected life of the cable. If a cable is intended to be used outside the recommended uses the cable
manufacturer should be consulted for advice.
In specific cases where guidance is not given, it is recommended that specific advice of the cable
manufacturer is sought.
In some countries, legislation may limit the use of certain cable types and define additional requirements for
cable installation practice.
Additional information on installation practice is given in HD 60364 and HD 384 series of specifications, and
national regulations/code practices.
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1 Scope
This European Standard provides guidance to help installers, cabling designers and end users to understand
the characteristics of electric cables, with a rated voltage not exceeding 450/750 V (U /U) or equivalent d.c.
0
voltages, so that the cable can be selected, installed and operated in a safe way. It is applicable to those
cable types that are specified in EN 50525 (all parts).
The guidance given in this European Standard can also be applicable to low-voltage cables of a similar type to
those specified in EN 50525 but not specifically mentioned in those standards. In these cases, it is advisable
to seek additional advice from the cable manufacturer.
Legal or statutory requirements do take precedence over the guidance given in this document.
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 50525 (all parts), Electric cables — Low voltage energy cables of rated voltages up to and including
450/750 V (Uo/U)
EN 50565-2, Electric cables — Guide to use for cables with a rated voltage not exceeding 450/750 V – Part 2:
Specific guidance related to EN 50525 cable types
EN 60079 (all parts), Electrical apparatus for explosive gas atmospheres (IEC 60079, all parts)
EN 60335-1, Household and similar electrical appliances — Safety — Part 1: General requirements
(IEC 60335-1)
HD 384 (all parts), Electrical Installations of buildings
HD 60364 (all parts), Low voltage electrical Installations (IEC 60364, all parts)
IEC 60050-461, International Electrotechnical Vocabulary — Part 461: Electric cables
IEC 60287 (all parts), Electric cables — Calculation of the current rating
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60050-461, HD 60364 and HD 384
standard series and the following apply.
3.1
internal wiring
wiring mechanically protected by being enclosed within a casing of equipment or by other equivalent means
3.2
skilled person
person with technical knowledge or sufficient experience to enable him/her to avoid dangers which electricity
may create
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3.3
instructed person
person adequately advised or supervised by skilled persons to enable him/her to avoid dangers which
electricity may create
4 Safety
4.1 General
Safety of a cable means that the product does not present an unacceptable risk of danger to life or property
whilst being used in its intended manner.
The duration of acceptable performance of a particular type of cable depends upon the type of use, installation
or electrical apparatus and on the particular combination of influences relating thereto. For example, the
duration of acceptable performance considered as reasonable for a cable used in a fixed installation for the
distribution of electricity in a building is more than that for flexible cable.
The test methods and test parameters described in the EN Standards referred to in Clause 1 are only for the
purposes of checking design with respect to safety and quality assurance. They do not indicate that the cables
are suitable for service under conditions equivalent to the test conditions.
Cables shall not be used for any purpose other than the transmission and distribution of electricity, and shall
be installed, jointed or/and connected to apparatus only by suitably skilled or instructed personnel.
4.2 Selection and installation
4.2.1 All cables shall be selected so as to be suitable for the voltages and currents likely to occur.
4.2.2 Cables shall be selected so that they are suitable for the intended operating conditions and equipment
classification. Examples of operation conditions are:
a) voltage;
b) current;
c) protective measures;
d) grouping of cables;
e) method of installation;
f) accessibility.
4.2.3 Cables shall be selected so that they are of a type designed to be suitable for any external influences
which might exist. Examples of external influences are:
a) ambient temperature;
b) presence of rain, steam or accumulation of water;
c) presence of corrosive, chemical or polluting substances;
d) mechanical stresses (such as through holes or sharp edges in metal work), impact or vibration;
e) fauna (such as rodents);
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f) flora (such as mould);
g) radiation (such as sunlight).
Annex A gives an explanation of the different types of usage (i.e. indoor/outdoor).
4.2.4 Cables shall be so selected, installed, protected, used and maintained as to prevent danger so far as
it is reasonably practicable.
4.2.5 Care shall be taken during the installation and termination of cables so as not to damage the cables.
For cables with sheaths, it is recommended that the minimum length of sheath is removed in order not to
change the mechanical characteristics of the cable in this critical part of the installation. Also, when removing
cable sheaths, damage to the insulation shall be avoided.
4.2.6 Cables covered by this guide to use, shall not be directly or indirectly buried in the ground. Some
National Regulations allow temporary installation of some heavy duty flexible cables directly or indirectly in the
ground (please see relevant National Regulations).
4.2.7 Cables shall be prevented from being in contact with or close to hot surfaces, unless they are of a
type intended for such conditions. It should be noted that thermoplastic insulated and/or sheathed cables have
a relatively low melting temperature, and very careful consideration of the temperatures involved shall be
made before selection and use of this type of cable.
4.2.8 In an installation that may be subject to damage by fauna (such as rodents) additional protection is
required.
4.3 Cables in fixed installations
Cables shall be supported adequately. The recommended maximum spacing of supports is given in Table 1.
In deciding the actual spacing required, the fixing method, the likelihood of vibration and the mass of the cable
between the supports shall be taken into account.
Cables shall not be damaged by any mechanical restraint used for their support.
In the case of single-core cables, the spacing also depends on the dynamic forces due to a short-circuit
current; the manufacturer’s recommendations shall be observed (see 5.8).
Cables which have been in use can be damaged if they are disturbed. This can arise from the effect of natural
ageing on the physical properties of the materials used for cable insulation and sheathing which can ultimately
result in hardening of these materials.
Cables for fixed installation shall not be installed in contact with water, unless specifically designed for such
purposes.
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Table 1 — Spacing of supports for non-armoured cables in accessible positions
a b c
Overall diameter (D) of cable Maximum spacing of clips (mm)
(mm) Horizontal Vertical
D ≤ 9 250 400
9 < D ≤ 15 300 400
350 450
15 < D ≤ 20
d
400 550
20 < D ≤ 40
a
For flat cables this is taken as the measurement of the major axis.
b
The spacings stated for horizontal runs may also be applied to runs at an angle of more than 30° from the vertical. For runs at
an angle of 30° or less than the vertical, the vertical spacings are applicable.
c
The spacing stated in this table is a maximum. Reduced spacing may be required for various reasons, for example, the fixing
method used, vibration, weight of cable.
d
For the spacing of supports for cables of overall diameter exceeding 40 mm, and for single core cables having conductors of
2
cross-sectional area 300 mm and larger, the manufacturer’s recommendations shall be observed.
4.4 Flexible cables
4.4.1 Flexible cables shall be used for connections to all mobile equipment. The length of such cables shall
not be so great as to prevent the short circuit protective device from operating correctly. Such cables shall
also be of a minimum practical length to reduce the risk of mechanical damage.
4.4.2 Flexible cables shall be selected and used with due reference to the appropriate class of duty.
Annex B gives information on classes of duty.
4.4.3 Where thermoplastic flexible cables are acceptable, consideration shall be given to the use of
extensible leads as a means of limiting the length of the connection.
4.4.4 Flexible multicore control cables, if installed so that they are continually flexed, shall be protected in a
manner which minimises the possibility of abrasion, cutting and sharp bends.
4.4.5 Flexible cables shall not be used as fixed wiring unless they are contained in an enclosure affording
mechanical protection, with the following two exceptions:
final connection to fixed equipment when the duty type of the cable is at least ordinary duty or higher;
fixed installations in temporary buildings when the duty type of the cable is heavy duty.
4.4.6 Flexible cables shall not be installed in plaster.
4.4.7 Exposed lengths of flexible cable used as final connections to fixed equipment shall be as short as
practicably possible and shall be directly connected to the fixed wiring in a manner that is appropriate to the
equipment and the method of termination.
4.4.8 Flexible cables shall not be subject to excessive tension (see 5.6.2), crushing, abrasion, torsion and
kinking, particularly at the inlet of the appliance and at the point of connection to the fixed wiring. They shall
not be damaged by any strain relief or clamping device.
4.4.9 Flexible cables shall not be placed under carpets or other floor coverings, where there is:
a) any risk of thermal insulating effects, leading to excessive temperature rise (see 5.4.1a); or
b) any risk of damage due to furniture or equipment resting on them or traffic passing over them.
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4.4.10 Thermoplastic covered cables shall not be used for welding, this includes both industrial arc welding
and hobby welding. Only the cross-linked elastomeric covered cables specified in EN 50525-2-81 shall be
used for such purposes, as they are designed to resist the hot particles that are commonly generated during
welding.
4.4.11 When flexible cables are required for use outdoors, whether for intermittent, temporary or permanent
usage, their suitability for such usage shall be determined in accordance with EN 50565-2. Flexible
thermoplastic cables are unsuitable for permanent use outdoors.
4.4.12 Non-sheathed cables shall not be used for connection to any Class II appliance (as defined in
EN 60335-1), or for any extension lead or for the replacement of any sheathed cable type.
4.4.13 Flexible cables covered by this guide shall not be used in deep mining, or opencast mining, or
tunnelling operations, or in quarrying or similar use or on moveable equipment such as cranes with spring-
loaded reeling devices.
4.4.14 Flexible thermoplastic cables are not necessarily suitable for the manufacture of extensible leads.
5 Limiting conditions
5.1 General
The influence of all factors as outlined in 5.2 to 5.8 shall be considered in combination, not separately.
5.2 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 U /U,
0
expressed in volts, where:
a) U is the r.m.s. value between any insulated conductor and “earth” (metal covering of the cable or the
0
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 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 U and U.
0
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 2.
Table 2 — Maximum permitted voltages against rated voltage of cable
Rated voltage of cable Maximum permanent permitted operating voltage of the cable
a.c. d.c.
Conductor-earth Conductor- Conductor-earth Conductor-conductor
U /U
0
conductor
V (V) (V)
U (V) U (V)
0
a
300/300 320 320 410 410
300/500 320 550 410 820
450/750 480 825 620 1240
a
Single phase power system only
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5.3 Current-carrying capacity
5.3.1 The cross-sectional area of every conductor shall be such that its current-carrying capacity is not less
than the maximum sustained current which will normally flow through it.
5.3.2 The limiting temperature to which the current-carrying capacity is related shall not exceed that
appropriate to the type of cable insulation or sheath concerned.
5.3.3 The current-carrying capacities for fixed wiring shall be in accordance with HD 60364-5-52, National
regulations/codes or where not available reference shall be made to the cable manufacturer.
The values given for fixed wiring in HD 60364-5-52 for the particular cable type and size have been
determined such that the limiting temperatures of the cable are not exceeded, under the particular installation
conditions given, when the cables are continuously loaded (100 % load factor) with current having an
alternating frequency of 50 Hz or 60 Hz. National regulations/codes also give current carrying capacity that
are in line with limiting temperatures of the cables.
If current ratings for a particular fixed wiring cable type are not included in HD 60364-5-52, or given by
National regulations/codes they shall be derived from IEC 60287 or reference shall be made to the cable
manufacturer.
Current ratings for light, ordinary and heavy duty flexible cables at standard temperature for installation in air
are given in Annex C. National regulations/codes also give current carrying capacity that are in line with
limiting temperatures of the cables.
For arc welding cables, the current-carrying capacities and the associated voltage drop figures are given for
various duty cycles in Annex D.
5.3.4 In the case of soft soldered joints or terminations, the temperature for the conductor under short circuit
conditions shall be not more than 160 ºC.
5.3.5 Tinned copper flexible conductors shall not be used at temperatures above 200 ºC, even under fault
conditions.
5.3.6 The conductors of an a.c. circuit installed in a ferromagnetic enclosure shall be arranged so that all
conductors are contained in the same enclosure.
5.3.7 The method of installation used for the cable affects its current-carrying capacity, and due account
shall be taken of this. Correction factors for quoted current-carrying capacities are sometimes available for
particular conditions such as:
a) ambient temperature;
b) cable grouping;
c) type of overcurrent protection;
d) presence of thermal insulation;
e) reeled/drummed cables;
f) frequency of supply (if different from 50 or 60 Hz, etc.);
g) effect of harmonics.
5.3.8 The selection of the cross-sectional area of any conductor shall not be based on current-carrying
capacity alone. Account shall also be taken of:
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a) protection against electric shock;
b) thermal effects;
c) overload and short circuit current;
d) voltage drop;
e) mechanical strength;
taking particular account of influences such as:
f) limiting temperatures for terminals of equipment, busbars or bare conductors;
g) limiting short circuit temperatures;
h) the carrying of current by the neutral conductor, e.g. as resulting from the presence of significant
harmonic current in a three-phase circuit;
i) electromagnetic effects;
j) reduction of heat dissipation;
k) size of the circuit protective conductor under fault conditions;
l) solar or infra-red radiation.
This list is not exhaustive. Other influences might arise for particular installations.
5.4 Thermal effects
5.4.1 The maximum continuous operating temperature
...
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