IEC 60800:2009
(Main)Heating cables with a rated voltage of 300/500 V for comfort heating and prevention of ice formation
Heating cables with a rated voltage of 300/500 V for comfort heating and prevention of ice formation
IEC 60800:2009 is applicable to, and specifies requirements for, resistive heating cables for low temperature applications such as comfort heating and the prevention of ice formation. These cables and cable sets may comprise either factory fabricated or field (work-site) assembled units, and which are heating cables assembled in accordance with manufacturer's instructions. Bare conductors and protected conductors to be supplied at voltages equal to, or less than, 50 V are excluded from the scope of this standard. Typical applications include, but are not limited to
- surface heating installed in or under surfaces
- direct and storage heating
- snow melting and frost protection of roofs, gutters, pipes, etc.
Heating cables for industrial and commercial applications are specified in the IEC 62395 series as are mineral insulated heating cables. Applications in which the operating sheath temperature exceeds 100 °C are outside the scope of this standard. The object of this standard is to ensure that electrical resistance heating cables operate safely under their normal defined conditions of use. This is achieved by:
- employing heating cables of the appropriate construction that meet the test criteria detailed in this standard
- including, for cables with an electrical protective component, a metallic braid, concentric wires or sheath, or other suitable electrically conductive material for protective purposes in case of fault
- ensuring that the cables operate at safe temperatures with respect to the materials used in the construction of the cables and their installations according to national regulations.
The significant technical changes with respect to the previous edition are as follows
- introduction of heating cable sets
- testing of heating cable sets, including the integrated cold-lead, cold-lead splice and end-termination in twin and multicore cable sets, in addition to the heating cable
- introduction of requirements for installation instructions
- reduction to two, instead of three, mechanical classes, one for cables intended for installation with a low risk of mechanical damage (M1) and one for cables intended for installation with a higher risk of mechanical damage (M2)
- elimination of reference to specific materials to be used as insulation and sheath
- introduction of routine and sample tests.
Câbles chauffants de tension assignée 300/500 V pour le chauffage des locaux et la protection contre la formation de glace
La CEI 60800:2009 s'applique et spécifie les exigences pour les systèmes de câbles chauffants résistants utilisés dans des applications basse température telles que le chauffage des locaux ou la protection contre le gel. Ces câbles et ces câbles équipés peuvent comprendre soit des unités fabriquées en usine ou assemblées sur, le terrain (site de travail) et qui sont des câbles chauffants assemblés conformément aux instructions du fabricant. Les conducteurs nus ou protégés qui sont alimentés à une tension inférieure ou égale à 50 V sont exclus du domaine d'application de la présente norme. Les applications typiques comprennent entre autre:
- les surfaces chauffantes installées dans ou sous le sol fini;
- le chauffage direct ou à accumulation;
- le dégivrage des toits, gouttières, chénaux, etc.
Les câbles chauffants pour les applications commerciales et industrielles sont spécifiés dans la série CEI 62395 en tant que câbles chauffants à isolation minérale. Les applications pour lesquelles la température de la gaine dépasse 100 °C sont hors du domaine s'application de cette norme. L'objet de cette norme est de s'en assurer que les câbles chauffants résistants électriques fonctionnent de façon sûre dans leurs conditions normales d'utilisation. Ce but est atteint en:
- utilisant de câbles chauffants de construction approprié qui répondent aux critères d'essais détaillés dans cette norme;
- incluant pour les câbles comprenant un élément de protection électrique tel que une tresse métallique, des fils concentriques, une gaine ou tout autre élément conducteur métallique adapté dans un but de protection en cas de défaut;
- s'assurant que les câbles fonctionnent à une température sûre en respectant, conformément aux règlements nationaux, les types de matériaux utilisés dans la construction des câbles et leur installation.
Les principales modifications techniques par rapport à l'édition antérieure sont indiquées ci-dessous:
- introduction des câbles chauffants équipés;
- essais, en plus des câbles chauffants, des câbles chauffants équipés comprenant les liaisons froides intégrées, les jonctions de liaisons froides et les terminaisons d'extrémité pour les paires et les unités de câbles multiconducteurs;
- introduction des exigences relatives aux instructions d'installation;
- réduction des classes mécaniques de trois à deux: une pour les câbles destinés à des installations comportant des risques de dommages mécaniques faibles (M1) et une pour les câbles destinés à des installations comportant des risques de dommages mécaniques élevés (M2);
- disparition des références pour les matériaux spécifiques étant utilisés comme isolant et gaine;
- introduction des essais de série et des essais d'échantillonnage. Le contenu du corrigendum de août 2009 a été pris en considération dans cet exemplaire.
General Information
Relations
Standards Content (Sample)
IEC 60800 ®
Edition 3.0 2009-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Heating cables with a rated voltage of 300/500 V for comfort heating and
prevention of ice formation
Câbles chauffants de tension assignée 300/500 V pour le chauffage des locaux
et la protection contre la formation de glace
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by
any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IEC or
IEC's member National Committee in the country of the requester.
If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,
please contact the address below or your local IEC member National Committee for further information.
Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie
et les microfilms, sans l'accord écrit de la CEI ou du Comité national de la CEI du pays du demandeur.
Si vous avez des questions sur le copyright de la CEI ou si vous désirez obtenir des droits supplémentaires sur cette
publication, utilisez les coordonnées ci-après ou contactez le Comité national de la CEI de votre pays de résidence.
IEC Central Office
3, rue de Varembé
CH-1211 Geneva 20
Switzerland
Email: inmail@iec.ch
Web: www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
ƒ Catalogue of IEC publications: www.iec.ch/searchpub
The IEC on-line Catalogue enables you to search by a variety of criteria (reference number, text, technical committee,…).
It also gives information on projects, withdrawn and replaced publications.
ƒ IEC Just Published: www.iec.ch/online_news/justpub
Stay up to date on all new IEC publications. Just Published details twice a month all new publications released. Available
on-line and also by email.
ƒ Electropedia: www.electropedia.org
The world's leading online dictionary of electronic and electrical terms containing more than 20 000 terms and definitions
in English and French, with equivalent terms in additional languages. Also known as the International Electrotechnical
Vocabulary online.
ƒ Customer Service Centre: www.iec.ch/webstore/custserv
If you wish to give us your feedback on this publication or need further assistance, please visit the Customer Service
Centre FAQ or contact us:
Email: csc@iec.ch
Tel.: +41 22 919 02 11
Fax: +41 22 919 03 00
A propos de la CEI
La Commission Electrotechnique Internationale (CEI) est la première organisation mondiale qui élabore et publie des
normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.
A propos des publications CEI
Le contenu technique des publications de la CEI est constamment revu. Veuillez vous assurer que vous possédez
l’édition la plus récente, un corrigendum ou amendement peut avoir été publié.
ƒ Catalogue des publications de la CEI: www.iec.ch/searchpub/cur_fut-f.htm
Le Catalogue en-ligne de la CEI vous permet d’effectuer des recherches en utilisant différents critères (numéro de référence,
texte, comité d’études,…). Il donne aussi des informations sur les projets et les publications retirées ou remplacées.
ƒ Just Published CEI: www.iec.ch/online_news/justpub
Restez informé sur les nouvelles publications de la CEI. Just Published détaille deux fois par mois les nouvelles
publications parues. Disponible en-ligne et aussi par email.
ƒ Electropedia: www.electropedia.org
Le premier dictionnaire en ligne au monde de termes électroniques et électriques. Il contient plus de 20 000 termes et
définitions en anglais et en français, ainsi que les termes équivalents dans les langues additionnelles. Egalement appelé
Vocabulaire Electrotechnique International en ligne.
ƒ Service Clients: www.iec.ch/webstore/custserv/custserv_entry-f.htm
Si vous désirez nous donner des commentaires sur cette publication ou si vous avez des questions, visitez le FAQ du
Service clients ou contactez-nous:
Email: csc@iec.ch
Tél.: +41 22 919 02 11
Fax: +41 22 919 03 00
IEC 60800 ®
Edition 3.0 2009-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Heating cables with a rated voltage of 300/500 V for comfort heating and
prevention of ice formation
Câbles chauffants de tension assignée 300/500 V pour le chauffage des locaux
et la protection contre la formation de glace
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
U
CODE PRIX
ICS 29.060.20; 97.100 ISBN 978-2-88910-298-3
– 2 – 60800 © IEC:2009
CONTENTS
FOREWORD.4
INTRODUCTION.6
1 Scope and object.7
2 Normative references .7
3 Terms and definitions .8
4 Mechanical classification .10
5 Requirement for marking .11
6 Requirements for installation instructions .12
7 General requirements for construction of cables .12
7.1 General .12
7.2 Conductors.13
7.3 Insulation .13
7.4 Electrically conducting screen .13
7.5 Armouring .13
7.6 Sheath .14
7.7 Moisture resistance .14
8 Testing .14
8.1 Type tests – General requirements.14
8.2 Type tests – Detailed test requirements.15
8.2.1 Electrical resistance of heating conductors and screen.15
8.2.2 Water immersion and temperature cycling test .15
8.2.3 Verification of rated output for parallel heating cables.16
8.2.4 Verification of start-up current for parallel heating cables .17
8.2.5 Penetration test for electrical conductive screen .17
8.2.6 Flammability test .17
8.2.7 Deformation test for installation classification .18
8.2.8 Cold impact test .19
8.2.9 Cold bend test .20
8.2.10 Ageing test for insulation .21
8.2.11 Ageing test for non-metallic sheath.21
8.2.12 Compatability test.22
8.2.13 UV-resistance test .22
8.2.14 Tensile test.23
8.2.15 Reverse winding test .23
8.2.16 Heat shock test.24
8.2.17 Shrinkage test for insulation and sheath .24
8.2.18 Hot set test.24
8.2.19 Cyclic ageing test for the heating cable .24
8.2.20 Cyclic ageing test for splices and end seals.25
8.2.21 Checking of the durability of markings .25
8.2.22 Abrasion test .25
8.2.23 Deformation test for insulation and sheathing materials .26
8.3 Routine and sample tests .26
8.3.1 Voltage test .26
8.3.2 Heating cable resistance and output verification .26
8.3.3 Insulation thickness .26
60800 © IEC:2009 – 3 –
8.3.4 Sheath thickness .26
8.3.5 Hot set test.27
Bibliography.28
Figure 1 – Typical arrangement for testing the splice .18
Figure 2 – Typical arrangement for testing the end seal .18
Figure 3 – Cold bend test.21
Figure 4 – Jaws for tensile machine.23
– 4 – 60800 © IEC:2009
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HEATING CABLES WITH A RATED VOLTAGE OF 300/500 V
FOR COMFORT HEATING AND PREVENTION
OF ICE FORMATION
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60800 has been prepared by IEC technical committee 20: Electric
cables.
This third edition cancels and replaces the second edition, published in 1992, and constitutes
a technical revision.
The significant technical changes with respect to the previous edition are as follows:
– introduction of heating cable sets;
– testing of heating cable sets, including the integrated cold-lead, cold-lead splice and end-
termination in twin and multicore cable sets, in addition to the heating cable;
– introduction of requirements for installation instructions;
– reduction to two, instead of three, mechanical classes, one for cables intended for
installation with a low risk of mechanical damage (M1) and one for cables intended for
installation with a higher risk of mechanical damage (M2);
– elimination of reference to specific materials to be used as insulation and sheath;
– introduction of routine and sample tests.
660800 © IEC:2009 – 5 –
The text of this standard is based on the following documents:
FDIS Report on voting
20/1057/FDIS 20/1066/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
The contents of the corrigendum of August 2009 have been included in this copy.
– 6 – 60800 © IEC:2009
INTRODUCTION
This International Standard is intended to provide a comprehensive overview of the essential
requirements and testing appropriate to electrical resistance heating cables used for comfort
heating and prevention of ice formation. While some of this work already exists in national
standards or international standards, this standard has collated much of this existing work.
This standard provides a means to verify the electrical, thermal and mechanical durability of
resistive heating cables, so that in normal use their performance is without danger to the user
or surroundings. Compliance is checked by carrying out all the tests specified in this
standard.
60800 © IEC:2009 – 7 –
HEATING CABLES WITH A RATED VOLTAGE OF 300/500 V
FOR COMFORT HEATING AND PREVENTION
OF ICE FORMATION
1 Scope and object
This International Standard is applicable to, and specifies requirements for, resistive heating
cables for low temperature applications such as comfort heating and the prevention of ice
formation. These cables and cable sets may comprise either factory fabricated or field (work-
site) assembled units, and which are heating cables assembled in accordance with
manufacturer’s instructions.
Bare conductors and protected conductors to be supplied at voltages equal to, or less than,
50 V are excluded from the scope of this standard.
NOTE Terminations and gland fittings are outside the scope of this standard.
Typical applications include, but are not limited to:
• surface heating installed in or under surfaces;
• direct and storage heating;
• snow melting and frost protection of roofs, gutters, pipes, etc.
Heating cables for industrial and commercial applications are specified in the IEC 62395
series [1] as are mineral insulated heating cables.
Applications in which the operating sheath temperature exceeds 100 °C are outside the scope
of this standard.
The object of this standard is to ensure that electrical resistance heating cables operate
safely under their normal defined conditions of use. This is achieved by:
– employing heating cables of the appropriate construction that meet the test criteria
detailed in this standard;
– including, for cables with an electrical protective component, a metallic braid, concentric
wires or sheath, or other suitable electrically conductive material for protective purposes in
case of fault;
– ensuring that the cables operate at safe temperatures with respect to the materials used in
the construction of the cables and their installations according to national regulations.
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
IEC 60050-461, International Electrotechnical Vocabulary – Part 461: Electric cables
IEC 60228, Conductors of insulated cables
—————————
References in square brackets refer to the bibliography.
– 8 – 60800 © IEC:2009
IEC 60332-1-1, Tests on electric and optical fibre cables under fire conditions – Part 1-1: Test
for vertical flame propagation for a single insulated wire or cable – Apparatus
IEC 60332-1-2, Tests on electric and optical fibre cables under fire conditions – Part 1-2: Test
for vertical flame propagation for a single insulated wire or cable – Procedure for 1 kW pre-
mixed flame
IEC 60811-1-1, Common test methods for insulating and sheathing materials of electric
cables and optical cables – Part 1-1: Methods for general application –Measurement of
thickness and overall dimensions – Tests for determining the mechanical properties
IEC 60811-1-2:1985, Common test methods for insulating and sheathing materials of electric
and optical cables – Part 1-2: Methods for general application – Thermal ageing methods
Amendment 1 (1989)
Amendment 2 (2000)
IEC 60811-1-3, Common test methods for insulating and sheathing materials of electric and
optical cables – Part 1-3: General application – Methods for determining the density – Water
absorption tests – Shrinkage test
IEC 60811-1-4, Common test methods for insulating and sheathing materials of electric and
optical cables – Part 1-4: Methods for general application – Tests at low temperature
IEC 60811-2-1, Common test methods for insulating and sheathing materials of electric and
optical cables – Part 2-1: Methods specific to elastomeric compounds – Ozone resistance, hot
set and mineral oil immersion tests
IEC 60811-3-1, Common test methods for insulating and sheathing materials of electric and
optical cables – Part 3-1: Methods specific to PVC compounds – Pressure test at high
temperature – Tests for resistance to cracking
IEC 62395-1:2006, Electrical resistance trace heating systems for industrial and commercial
applications – Part 1: General and testing requirements
ISO 4892-3:2006, Plastics – Methods of exposure to laboratory light sources – Part 3:
Fluorescent UV lamps
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60050-461, together
with the following, apply.
3.1
armouring
mechanical reinforcement of the cable
NOTE The reinforcement can be made of one or more layers of steel wires or braid, or of a metallic sheath or
other suitable material.
3.2
cold lead
electrically insulated conductor or conductors used to connect a heating cable to the branch
circuit and designed so that it does not produce significant heat
3.3
connection splice
sealed splice, connecting the heating cable to the cold lead
60800 © IEC:2009 – 9 –
3.4
earthing conductor
uninsulated conductor which is in good electric contact with the electrical screen along
practically the whole length
3.5
electrical conductive screen
metallic braid, concentric wires, metallic sheath, or alternative covering with sufficient
conductivity so that, when bonded to ground, will cause a residual current device (RCD) to
operate under fault condition
3.6
end termination
sealed termination, which may be heat producing, connected to the heating cable at the end
opposite to that where the power is supplied
3.7
factory assembled unit or set
heating cable, including the necessary integral components, assembled by the manufacturer
3.8
field assembled unit or set
heating cable supplied in bulk, with the integral components to be assembled at the work site
3.9
heating cable
cable, with or without an electrically conductive screen, metallic or equivalent, sheath or
armour intended for emitting heat for heating purposes
3.10
heating cable set
heating cable with suitable power connection and end termination included
3.11
heating conductor
part of a heating cable in which the electrical energy is transformed into heat
3.12
insulation
material which insulates each conductor from other conductors or from conducting parts at
earth potential
3.13
integral components
factory-fabricated or field-assembled electrical terminations and connections, such as heat
shrink terminations, moulded end seals or splices, which conform to the general shape of the
heating cable and are exposed to the same environments as the heating cable
3.14
linear power density
power output in watts per linear metre for the heating cable and heating cable sets
3.15
operating conductor temperature
highest allowable continuous temperature of the cable conductor
– 10 – 60800 © IEC:2009
3.16
operating surface temperature
highest allowable continuous temperature of the cable surface
3.17
operating voltage
actual voltage applied to the heating cable when in service
3.18
rated temperature
temperature assigned to any insulated and sheathed cable which does not result in either the
insulation or the sheath being operated in excess of the appropriate operating surface
temperature
3.19
rated voltage
highest allowable voltage between the conductors in a twin and multi conductor cable, or
between one conductor and an electrical conductive screen, or between the two ends of a
single core cable, or earth in unscreened cables
3.20
rated resistance of individual conductor(s)
resistance at 20 °C of 1 m of cable
3.21
routine test
test made by the manufacturer on each manufactured length of cable to check that each
length meets the specified requirements
3.22
sample test
test made by the manufacturer on samples of completed cable or components taken from a
complete cable, at specified frequency, so as to verify that the finished product meets the
specified requirements
3.23
sheath
uniform and continuous tubular covering, metallic or non-metallic, enclosing the insulated
conductor(s), used for mechanical protection and to protect the cable against influences from
the surroundings (corrosion, moisture etc.)
3.24
type test
tests made before supplying, on a general commercial basis, a type of cable covered by this
standard, in order to demonstrate satisfactory performance characteristics to meet the
intended application
NOTE These tests are of such a nature, that after they have been made, they need not to be repeated, unless
changes are made in the cable materials or design or manufacturing process which might change the performance
characteristics.
4 Mechanical classification
The cables in this standard have been divided into two classes which indicate their ability to
withstand mechanical forces during and after installation. These classes are as follows:
– mechanical class M1: for cables intended for installation with low risk of mechanical
damage.
60800 © IEC:2009 – 11 –
– mechanical class M2: for cables intended for installation with higher risk of mechanical
damage.
The class of any cable is determined by its performance as measured against the
requirements in 8.2.7, 8.2.8 and 8.2.14.
NOTE 1 Mechanical class M1: for cables intended for use in applications with low risk of mechanical damage, as
for example installed on even surfaces like flat, smooth sub-floors of concrete or wooden materials or thermal
insulations, embedded in screeds with no sharp objects, etc.
NOTE 2 Mechanical class M2: for cables intended for use in applications with higher risk of mechanical damage,
such as installation on steel reinforcing grids, direct embedding in soil, concrete with sharp objects, roof and
gutters, etc.
5 Requirement for marking
The product shall be marked by printing, embossing or indenting on the sheath or on a label
attached to the product or on a component inside the cable.
NOTE 1 Embossing is not recommended on the insulation.
A label shall be attached to the product in a permanent way and be clearly detectable to the
electrical installer.
NOTE 2 The label should preferably be attached to that part of the product which is clearly visible when
unpacking the product, ready for installation.
The marking shall at least contain:
• identification of the manufacturer by name and or a symbol;
• the type reference;
• resistance per metre of cable at 20 °C in Ohms per metre if single or twin conductor series
resistive cables, or for a parallel cable, power output in Watts per metre at a reference
temperature. For series resistive cables with more than two conductors the resistance of
each conductor shall be clearly marked;
• mechanical classification;
• the rated voltage for parallel heating cables or maximum operating voltage for series
heating cables;
• if applicable, “only for installation in concrete”.
The distance between the end of one complete set of marks and the beginning of the next
shall not exceed:
– 550 mm, if the marking is on the sheath;
– 275 mm, if the marking is on a component inside the cable.
If the units are factory assembled, the following additional information shall be provided:
For series resistive units:
– nominal voltage;
– total wattage;
– total resistance.
For parallel resistive units:
– power output in Watts per metre at a reference temperature or total wattage.
– 12 – 60800 © IEC:2009
Printed marking shall be durable. Compliance with this requirement shall be checked by the
test given in 8.2.21.
The above are the minimum requirements and suppliers are free to add any additional
information which may be useful.
NOTE 3 Traceability is recommended, for example week/year.
NOTE 4 National regulations may give other requirements.
6 Requirements for installation instructions
The manufacturer shall provide product specific installation instructions for heating cables,
heating cable sets and components. The instructions shall be clearly identified as to the
products and locations that apply, and shall include the following information:
a) the intended use(s), either by general application type or by specific listed application;
b) a means of isolating all line conductors from the supply;
c) over-current protection provided;
d) the statement “Residual current device (RCD) protection is required”;
e) for mechanical classification M1 heating cables, intended for reduced levels of mechanical
forces, the statement “Caution: Do not use in areas subject to high mechanical loads or
impact”;
f) an applicable statement to indicate that any metal sheath, braid, screen or equivalent
electrically conductive covering of the heating cable shall be connected to an earth
terminal;
g) minimum installation temperature;
h) minimum bending radius;
i) the statement: “The presence of the heating cable shall be made evident by the posting of
caution signs or markings, such as in the fuse box, at appropriate locations, such as at the
power connection fittings and/or at frequent intervals along the circuit and be part of any
electrical documentation following the installation”;
j) if applicable, the statement “The heating cable shall only be installed in concrete”.
The above are the minimum requirements and suppliers are free to add any additional
information which may be useful.
NOTE National regulations, or in their absence, the IEC 60364 series [2], may give other requirements.
7 General requirements for construction of cables
7.1 General
The cables shall be designed and constructed so as to give electrical, thermal and
mechanical durability, and so that, in normal use, their performance is without danger to the
user or surroundings.
All integral components shall comply with this standard. All others shall comply with relevant
product standards.
Compliance is checked by all the requirements and tests specified in this standard.
All parts of a heating cable intended for use in contact with potable water shall be constructed
of materials that meet relevant national or local requirements.
60800 © IEC:2009 – 13 –
7.2 Conductors
Conductors shall consist of one or more wires of pure or alloyed metal. In the case of
conductors consisting of pure copper coated with a metallic coating, the metallic coating shall
be appropriate to the conductor operating temperature. The resistance of the conductors at
20 °C ± 1 °C shall be in accordance with the values given by the manufacturer with a
maximum tolerance of %.
The heating conductor material used shall not have a negative temperature coefficient of
resistance. Compliance shall be checked according to the test in 8.2.1.
7.3 Insulation
The insulating materials used in heating cables shall be suitable for the intended use. This
shall be verified by meeting the tests and the requirements given in this standard.
The minimum average value of the insulation thickness shall be stated by the manufacturer,
and measured according to IEC 60811-1-1, and meet the minimum requirement specified in
8.3.4.
7.4 Electrically conducting screen
When applicable and required, heating cables shall be provided with an evenly distributed
electrically conductive metallic screen, or electrically conductive metallic sheath, tape or
laminate or other suitable electrically conductive material. The metallic screen or electrically
conductive material shall enable protection device(s) to operate as intended.
NOTE 1 For cables without an electrically conducting screen, additional national requirements may apply.
The resistance of the conductive sheath or screen, inclusive of a separate earthing conductor
which shall be in contact with the sheath or screen, shall be not higher than the resistance of
each conductor in the cable or higher than the resistance of a plain copper conductor having
0,5 mm cross-sectional area as given for a class 1 conductor according to IEC 60228,
whichever is the lesser. The combined resistance of any earthing conductor included with this
screen or sheath shall not be greater than that of a 0,5 mm copper conductor. A number of
copper wires may be included in order to comply with the requirements.
NOTE 2 In some countries, national regulations require the resistance to be less than that of 0,5 mm copper
conductors.
Compliance shall be checked as described in 8.2.1.
If conductive sheath or screen alone is used as the earthing conductor, the resistance
measured shall be the total resistance including the earthing connections delivered with the
cable.
Electrically conductive screens shall be so constructed as to prevent the penetration of
foreign substances greater than 1 mm in diameter into the insulation without touching the
screen. Compliance shall be checked by the test specified in 8.2.5.
7.5 Armouring
Separate armouring, if any, may consist of metallic or non-metallic wires, sheath, tape or
laminate. If metallic, it shall not be applied directly on to the metallic sheath if any, but shall
be separated from this by a protective layer of suitable insulating material which can
withstand the mechanical abuse and the temperatures which can occur under normal use, and
protects the metallic sheath against corrosion.
– 14 – 60800 © IEC:2009
Electrically conductive armouring shall be so constructed as to prevent the penetration of
foreign substances greater than 1 mm in diameter into the insulation without touching the
armouring. Compliance shall be checked by the test as specified in 8.2.5.
If the armouring is based on a conductive material the same requirements as specified for the
electrically conductive screen shall apply.
NOTE National regulations may give other requirements.
7.6 Sheath
The sheathing materials used in heating cables shall be suitable for the intended use. This
shall be verified by meeting the tests and the requirements given in this standard.
A non-metallic outer sheath shall give mechanical and/or corrosion protection dependent on
the type of cable.
The minimum average value of the sheath thickness shall be stated by the manufacturer and
measured according to IEC 60811-1-1, and meet the minimum requirement specified in 8.3.5.
7.7 Moisture resistance
Heating cables shall comply with the requirements as stated in 8.2.2.
NOTE This requirement is comparable with class IPX7 as defined in IEC 60529 [3].
8 Testing
8.1 Type tests – General requirements
For heating cables intended to be supplied in bulk, a 5 m sample of the heating cable shall be
used for testing, if not otherwise specified.
For heating cable sets which are factory assembled, including cold lead, splice and end seal,
the complete heating cable set shall be used for testing. Alternatively a 5 m sample of cable
may be tested. The various parts such as cold lead, connection splice and end termination
may be assembled on a dummy length of cable and tested separately.
For heating cables intended to be field assembled, the connections and end terminations to
be used and specified by the manufacturer shall be assembled, according to the
manufacturer’s instructions, with the heating cable to form a heating cable set. The complete
heating cable set shall be tested. Alternatively a 5 m sample of cable may be tested. The
various parts such as cold lead, connection splice and end termination may be assembled on
a 5 m dummy length of cable and tested separately, if not otherwise specified.
All sample components used shall be typical examples from what is supplied to the market or
intended to be supplied to the market.
Tests shall be conducted at a room temperature between 20 °C and 25 °C, unless otherwise
specified.
Unless otherwise specified, the test voltage shall be a.c. at a frequency between 49 Hz and
61 Hz of approximately sinusoidal waveform.
For a parallel resistive cable, the power output in Watts per metre shall be checked according
to the test in 8.2.3.
60800 © IEC:2009 – 15 –
For a parallel resistive cable, the start-up current shall be checked according to the test in
8.2.4.
Separate samples may be used for each test unless otherwise specified. These shall be
prepared in accordance with the manufacturer’s recommendations.
If a sample does not meet a specified requirement, two new complete sets of samples shall
be tested. If both pass the test requirement, the cable shall be deemed to meet the test.
8.2 Type tests – Detailed test requirements
8.2.1 Electrical resistance of heating conductors and screen
The resistance of the conductor(s) and screen, if any, shall be measured by any suitable
means on samples at least 1 m long. Two measurements shall be taken for the individual
conductors, the first at ambient temperature and the second at a temperature of 100 °C. The
measurement at ambient temperature, corrected to 20 °C ± 1 °C, shall determine whether or
not the resistance value specified by the manufacturer has been achieved, both for the
conductors and the screen.
The measurement at the higher temperature shall be compared with that at ambient
temperature to confirm that the individual conductor(s) does not have a negative temperature
coefficient of resistance.
8.2.2 Water immersion and temperature cycling test
8.2.2.1 General remark
A 5 m sample shall be subjected to two ageing cycles and shall be immersed for a total of
56 h in potable water at a temperature of 20 °C ± 5 °C for 8 h, 80 °C ± 5 °C for 16 h,
20 °C ± 5 °C for 8 h, 80 °C ± 5 °C for 16 h and 20 °C ± 5 °C for 8 h, i.e. 8 h + 16 h + 8 h
+16 h+ 8 h.
The sample shall be transferred to preheated water containers between each sub-cycle. The
temperature in the water containers must be controlled, for example by placing them in
preheated cabinets according to IEC 60811-1-2
Heating cable sets, including factory assembled cold lead, splice and end seal shall be
subjected to this test after being assembled to a suitable heating cable.
Splices and end seals intended for heating cables for field assembly shall be subjected to this
test after being assembled to a suitable heating cable and with cold leads.
All heating cable types and heating cable sets must be tested, except if they are clearly
identified as not to be used in wet or humid conditions.
The sample may be transferred from the ageing water immersion unit to another water
immersion unit for the dielectric testing described in 8.2.2.2 and the electrical insulation
resistance test described in 8.2.2.3. The water temperature of both shall be 20 °C ± 5 °C.
8.2.2.2 Dielectric test
A 5 m sample shall be submerged in potable water with uncovered ends of the sample
protruding sufficiently to avoid flashover at the prescribed voltage. The metallic or other
equivalent electrically conductive sheath shall be removed from the ends of the sample in
order to prevent breakdown at these points.
– 16 – 60800 © IEC:2009
Cables which have not been factory assembled and which are supplied with special
connections shall be tested with these connections submerged in water.
For a twin- and multi-conductor series resistive cable where the conductors are electrically
insulated from each other, the voltage shall be applied between the conductors and between
the conductors connected together and the metallic or equivalent conducting material, sheath,
armour or screen and water if no armour or screen is part of the cable construction.
For single conductor series heating cables with a metallic, or equivalent conducting material,
sheath, armour or screen the voltage shall be applied between the conductor and the sheath,
armour or screen.
For single conductor series heating cables without a metallic, or equivalent conducting
material, sheath, armour or screen the cable shall be submerged in water with the ends
protruding from the water to avoid flashover at the ends. The voltage shall be applied between
the conductor and the water,
For parallel resistive cables the voltage shall be applied between the conductors connected
together and the metallic sheath, braid, screen or equivalent electrically conductive covering.
Dielectric strength for insulated heating wires shall be tested by placing the insulated wire in
potable water. The voltage shall be applied between the conductor and the water.
An a.c. test voltage of 2 000 V shall be applied for 5 min. The test voltage shall be increased
gradually and the prescribed value reached in a time of 2 s to 10 s.
No breakdown shall occur.
8.2.2.3 Electrical insulation resistance test
The electrical insulation resistance shall be measured on the test sample(s) prepared in
accordance with 8.2.2.1, after the dielectric test in 8.2.2.2 has been carried out.
Non-screened cables shall be tested, submerged in water, with any layer(s) outside the
insulation removed.
For single conductor, series resistive cables, the resistance of the electrical insulation shall
be measured between the conductor and the metallic or equivalent conducting material,
sheath or armour or conductive screen.
For a multi-conductor series resistive cable, where the conductors are electrically insulated
from each other, the resistance of the insulation shall be measured between the conductors
connected together and the metallic, or equivalent conducting material, sheath or armour or
conductive screen, and also between each conductor in turn with the remaining conductor(s)
connected together.
For parallel cables the resistance shall be measured between the conductors connected
together and the metallic sheath, braid, screen or equivalent electrically conductive covering.
The insulation resistance shall be measured by means of a d.c. voltage of 1 000 V, 1 min after
application of the voltage, with the positive pole to the water. The measured value shall be not
less than 50 MΩ.
8.2.3 Verification of rated output for parallel heating cables
The rated output shall be verified by the method described in IEC 62395-1 [4].
60800 © IEC:2009 – 17 –
8.2.4 Verification of start-up current for parallel heating cables
The start-up current of the heating cable shall be measured as described in IEC 62395-1 [4].
8.2.5 Penetration test for electrical conductive screen
A steel test pin with a diameter of 1 mm shall be pushed through the conductive screen into
the insulation when the cable is straight and also when it is wound onto a mandrel of diameter
equal to five times the diameter, or the minor axis of the cable.
Three samples sha
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.
Loading comments...