Heating cables with a rated voltage up to and including 300/500 V for comfort heating and prevention of ice formation

IEC 60800:2021 is available as IEC 60800:2021 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 60800:2021 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 heating cables and heating cable sets can comprise either factory assembled or field (work-site) assembled units, and 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 document.
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.
Electrical resistance trace heating systems for industrial and commercial applications are specified in the IEC 62395 series [1] and for explosive atmospheres applications in the IEC/IEEE 60079-30 series [2], as are mineral insulated heating cables. Applications in which the sheath temperature exceeds 100 °C are outside the scope of this document.

Câbles chauffants de tension assignée jusques et y compris 300 V/500 V pour le chauffage des locaux et la protection contre la formation de glace

IEC 60800:2021 est disponible sous forme de IEC 60800:2021 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.L'IEC 60800:2021 s’applique aux câbles chauffants résistifs utilisés dans des applications basse température telles que le chauffage des locaux et la protection contre la formation de glace, et spécifie les exigences qui s’y appliquent. Ces câbles chauffants et câbles chauffants équipés peuvent comprendre soit des unités fabriquées en usine, soit des unités assemblées sur site (chantier), et sont des câbles chauffants assemblés conformément aux instructions du fabricant. Les conducteurs nus et les conducteurs protégés destinés à être alimentés à des tensions inférieures ou égales à 50 V sont exclus du domaine d’application du présent document.
Les applications typiques comprennent entre autres:
- le chauffage superficiel interne aux surfaces ou situé sous les surfaces;
- le chauffage direct et à accumulation;
- la fonte de neige et le dégivrage des toits, gouttières, chéneaux, etc.
Les systèmes de traçage par résistance électrique pour applications industrielles et commerciales sont spécifiés dans la série IEC 62395 [1] et ceux pour applications en atmosphères explosives dans la série IEC/IEEE 60079-30 [1], tout comme les câbles chauffants à isolation minérale. Les applications pour lesquelles la température de la gaine dépasse 100 °C ne relèvent pas du domaine d'application du présent document.

General Information

Status
Published
Publication Date
21-Nov-2021
Technical Committee
Current Stage
PPUB - Publication issued
Completion Date
22-Nov-2021
Ref Project

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IEC 60800
Edition 4.0 2021-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Heating cables with a rated voltage up to and including 300/500 V for comfort
heating and prevention of ice formation
Câbles chauffants de tension assignée jusques et y compris 300 V/500 V pour le
chauffage des locaux et la protection contre la formation de glace
IEC 60800:2021-11(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 60800
Edition 4.0 2021-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Heating cables with a rated voltage up to and including 300/500 V for comfort
heating and prevention of ice formation
Câbles chauffants de tension assignée jusques et y compris 300 V/500 V pour le
chauffage des locaux et la protection contre la formation de glace
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.060.20 ISBN 978-2-8322-1042-3

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 60800:2021 © IEC 2021
CONTENTS

FOREWORD ........................................................................................................................... 4

INTRODUCTION ..................................................................................................................... 6

1 Scope .............................................................................................................................. 7

2 Normative references ...................................................................................................... 7

3 Terms and definitions ...................................................................................................... 9

4 Mechanical classification ............................................................................................... 11

5 Requirements for marking .............................................................................................. 11

6 Requirements for installation instructions ...................................................................... 12

7 General requirements for construction of heating cables ................................................ 13

7.1 General ................................................................................................................. 13

7.2 Conductors ........................................................................................................... 13

7.3 Insulation .............................................................................................................. 14

7.4 Electrically conducting screen ............................................................................... 14

7.5 Armouring ............................................................................................................. 14

7.6 Sheath .................................................................................................................. 14

7.7 Moisture resistance ............................................................................................... 14

8 Testing .......................................................................................................................... 15

8.1 Type tests – General requirements ....................................................................... 15

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 ............................................... 16

8.2.3 Verification of rated output for parallel heating cables .................................... 17

8.2.4 Verification of start-up current for parallel heating cables .............................. 17

8.2.5 Penetration test for electrically conductive screen ......................................... 17

8.2.6 Flammability test ........................................................................................... 18

8.2.7 Deformation test for installation classification ................................................ 19

8.2.8 Cold impact test ............................................................................................. 20

8.2.9 Cold bend test ............................................................................................... 21

8.2.10 Ageing test for insulation ............................................................................... 22

8.2.11 Ageing test for non-metallic sheath ................................................................ 22

8.2.12 Compatibility test ........................................................................................... 22

8.2.13 Weathering and UV resistance test ................................................................ 22

8.2.14 Tensile test .................................................................................................... 23

8.2.15 Reverse winding test ..................................................................................... 24

8.2.16 Heat shock test .............................................................................................. 24

8.2.17 Shrinkage test for insulation and sheath ........................................................ 25

8.2.18 Hot set test .................................................................................................... 25

8.2.19 Cyclic ageing test for the heating cable ......................................................... 25

8.2.20 Cyclic ageing test for splices and end seals ................................................... 26

8.2.21 Checking of the durability of markings ........................................................... 26

8.2.22 Pressure test at high temperature for insulation and sheath ........................... 26

8.3 Routine and sample tests ...................................................................................... 27

8.3.1 General remarks ............................................................................................ 27

8.3.2 Voltage test ................................................................................................... 27

8.3.3 Heating cable resistance and output verification ............................................ 27

---------------------- Page: 4 ----------------------
IEC 60800:2021 © IEC 2021 – 3 –

8.3.4 Insulation thickness ....................................................................................... 27

8.3.5 Sheath thickness ........................................................................................... 27

8.3.6 Hot set test .................................................................................................... 28

Annex A (normative) Weathering and UV resistance test ..................................................... 29

Bibliography .......................................................................................................................... 30

Figure 1 – Typical arrangement for splice testing .................................................................. 18

Figure 2 – Typical arrangement for end seal testing .............................................................. 19

Figure 3 – Cold bend test ...................................................................................................... 21

Figure 4 – Jaws for tensile machine ...................................................................................... 24

---------------------- Page: 5 ----------------------
– 4 – IEC 60800:2021 © IEC 2021
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HEATING CABLES WITH A RATED VOLTAGE UP TO
AND INCLUDING 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 itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

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.

IEC 60800 has been prepared by IEC technical committee 20: Electric cables. It is an

International Standard.

This fourth edition cancels and replaces the third edition published in 2009. This edition

constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous

edition:
a) modification of the title: "up to and including", has been introduced;
b) update of IEC 60811 references;

c) introduction of a test for mechanical properties of sheaths after the water immersion and

temperature cycling test;

d) introduction of a weathering and UV resistance test according to ISO 4892-2:2013, Annex A.

---------------------- Page: 6 ----------------------
IEC 60800:2021 © IEC 2021 – 5 –
The text of this International Standard is based on the following documents:
Draft Report on voting
20/1972/FDIS 20/1991/RVD

Full information on the voting for its approval can be found in the report on voting indicated in

the above table.
The language used for the development of this International Standard is English.

This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in

accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available

at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are

described in greater detail at www.iec.ch/standardsdev/publications.

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under webstore.iec.ch in the data related to the

specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------------- Page: 7 ----------------------
– 6 – IEC 60800:2021 © IEC 2021
INTRODUCTION

This document 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 document has collated much of this existing work.

This document 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 document.

---------------------- Page: 8 ----------------------
IEC 60800:2021 © IEC 2021 – 7 –
HEATING CABLES WITH A RATED VOLTAGE UP TO
AND INCLUDING 300/500 V FOR COMFORT HEATING AND
PREVENTION OF ICE FORMATION
1 Scope

This document 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

heating cables and heating cable sets can comprise either factory assembled or field (work-

site) assembled units, and 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 document.
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.

Electrical resistance trace heating systems for industrial and commercial applications are

specified in the IEC 62395 series [1] and for explosive atmospheres applications in the

IEC/IEEE 60079-30 series [2], as are mineral insulated heating cables.

Applications in which the sheath temperature exceeds 100 °C are outside the scope of this

document.

The object of this document 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 document;

• including, for heating 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 heating 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 documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies.

For undated references, the latest edition of the referenced document (including any

amendments) applies.

IEC 60050-461, International Electrotechnical Vocabulary (IEV) – Part 461: Electric cables

(available at http://www.electropedia.org)
____________
Numbers in square brackets refer to the bibliography.
---------------------- Page: 9 ----------------------
– 8 – IEC 60800:2021 © IEC 2021
IEC 60228, Conductors of insulated cables

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 60364-7-701, Low-voltage electrical installations – Part 7-701: Requirements for special

installations or locations – Locations containing a bath or shower

IEC 60364-7-753, Low-voltage electrical installations – Part 7-753: Requirements for special

installations or locations – Heating cables and embedded heating systems
IEC 62230, Electric cables – Spark test method

IEC 60811-201, Electric and optical fibre cables – Test methods for non-metallic materials –

Part 201: General tests – Measurement of insulation thickness

IEC 60811-202, Electric and optical fibre cables – Test methods for non-metallic materials –

Part 202: General tests – Measurement of thickness of non-metallic sheath

IEC 60811-401, Electric and optical fibre cables – Test methods for non-metallic materials –

Part 401: Miscellaneous tests – Thermal ageing methods – Ageing in air oven

IEC 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 60811-502, Electric and optical fibre cables – Test methods for non-metallic materials-

Part 502: Mechanical tests – Shrinkage test for insulations

IEC 60811-503, Electric and optical fibre cables – Test methods for non-metallic materials –

Part 503: Mechanical tests – Shrinkage test for sheaths

IEC 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 60811-507, Electric and optical fibre cables – Test methods for non-metallic materials –

Part 507: Mechanical tests – Hot set test for cross-linked materials

IEC 60811-508, 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 60811-509, 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 62395-1:2013, Electrical resistance trace heating systems for industrial and commercial

applications – Part 1: General and testing requirements

ISO 4892-3:2016, Plastics – Methods of exposure to laboratory light sources – Part 3:

Fluorescent UV lamps
---------------------- Page: 10 ----------------------
IEC 60800:2021 © IEC 2021 – 9 –
3 Terms and definitions

For the purposes of this document, the terms and definitions given in IEC 60050-461 and the

following apply.

ISO and IEC maintain terminological databases for use in standardization at the following

addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
armouring
mechanical reinforcement of the heating cable

Note 1 to entry: 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, or an identical heating cable

3.4
earthing conductor

uninsulated conductor (drain wire) which is in good electric contact with the electrical screen

along the length
3.5
electrically 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 conditions
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 heating cable set

heating cable set (unit) supplied with components, which are assembled by the manufacturer

3.8
field assembled heating cable

heating cable supplied in bulk with components to be assembled during installation

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
---------------------- Page: 11 ----------------------
– 10 – IEC 60800:2021 © IEC 2021
3.10
heating cable set
heating cable with suitable power connection and end termination included
3.11
heating conductor

part of a serial 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-assembled 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
maximum sheath temperature
maximum temperature of the outermost covering of a heating cable
3.15
nominal voltage
actual voltage applied to the heating cable when in service
3.16
parallel heating cable

heating elements electrically connected in parallel, with the heating element either continuous

or in discrete units or zones, such that the watt density per unit length is not significantly

changed with any change in circuit length
3.17
rated resistance
resistance at 20 °C of 1 m of conductor

Note 1 to entry: Most heating cables contain more than one conductor and the resistance is measured for all

conductors.
3.18
rated voltage
reference voltage for which the heating cable is designed

Note 1 to entry: The rated voltage is expressed by the combination of two values U /U, expressed in volts:

U being the RMS value between any insulated conductor and "earth" (metal covering of the cable or the

surrounding medium);

U being the RMS value between any two-phase conductors of a multicore cable or of a system of single-core

cables.
Note 2 to entry: See IEC 62440:2008, 5.2 [3].
3.19
routine test

test made by the manufacturer on each manufactured length of cable to check that each length

meets the specified requirements
---------------------- Page: 12 ----------------------
IEC 60800:2021 © IEC 2021 – 11 –
3.20
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
3.21
sheath

uniform and continuous covering, metallic or non-metallic, enclosing the insulated conductor(s),

used for mechanical protection and to protect the cable against influences from the

surroundings
3.22
type test

test made before supplying, on a general commercial basis, a type of cable covered by this

document, 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 or design or manufacturing process which might change the performance

characteristics.
4 Mechanical classification

The heating cables in this document 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 heating cables intended for installation with low risk of mechanical

damage;

– mechanical class M2: for heating cables intended for installation with higher risk of

mechanical damage.

The class of any heating cable is determined by its performance as measured against the

requirements in 8.2.7 and 8.2.14.

NOTE 1 Mechanical class M1: for heating cables intended for use in applications with low risk of mechanical

damage, for example the installation on even surfaces like flat, smooth sub-floors of concrete or wooden materials

or thermal insulations, embed
...

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