SIST HD 604 S1:1998/A2:2003

0,6/1 kV and 1,9/3,3 kV power cables with special fire performance for use in power stations

Starkstromkabel mit besonderen Eigenschaften im Falle eines Brandes für Kraftwerke und einer Nennspannung von 0,6/1 kV und 1,9/3,3 kV

Câbles d'énergie 0,6/1 kV et 1,9/3,3 kV ayant un comportement au feu particulier et destinés aux centrales électriques

Elektroenergetski kabli za napetosti 0,6/1 kV in 1,9/3,3 kV s posebnimi ognjevzdržnimi lastnostmi za uporabo v elektrarnah

General Information

• Status: Published
• Publication Date: 31-Jan-2003
• ICS: 13.220.40 - Ignitability and burning behaviour of materials and products
• ICS: 29.060.20 - Cables
• Technical Committee: IEKA - Electric cables
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Feb-2003
• Due Date: 01-Feb-2003
• Completion Date: 01-Feb-2003
• Directive: 2006/95/EC - Directive 2006/95/EC of the European Parliament and of the Council of 12 December 2006 on the harmonisation of the laws of Member States relating to electrical equipment designed for use within certain voltage limits (codified version)
• Directive: 2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Directive: 73/23/EEC - Electrical equipment designed for use within certain voltage limits
• Ref Project: HD 604 S1:1994/A2:2002 - 0,6/1 kV and 1,9/3,3 kV power cables with special fire performance for use in power stations

Relations

• Amends: SIST HD 604 S1:1998 - 0,6/1 kV and 1,9/3,3 kV power cables with special fire performance for use in power stations
• Effective Date: 01-Feb-2003
• Revised: oSIST prHD 604-S2:2021 - 0,6/1,0 kV power cables with special fire performance for use in power stations and similar installations
• Effective Date: 24-Sep-2019

Overview

HD 604 S1:1994/A2:2002 (CENELEC Harmonization Document) specifies general requirements for 0,6/1 kV and 1,9/3,3 kV power cables with special fire performance for use in power stations. It covers rigid and flexible conductor cables for fixed installations in power generating plants and substations, including power supply and control cables (minimum conductor size 1 mm², up to 61 cores). Insulation and sheathing may be thermoplastic or thermosetting, halogenated or halogen‑free. The amendment (A2) updates Part 1 (general requirements) and cross‑references to modern EN/IEC test standards.

Key topics and technical requirements

• Scope and objective: standardizes cables that are safe and reliable in power station environments, defines characteristics and manufacturing requirements, and specifies conformity testing approaches.
• Cable types covered: PVC‑insulated and sheathed, XLPE/EPR insulated with PVC or chlorinated elastomer sheaths, and halogen‑free constructions (further detailed in Parts 3–5).
• Fire performance focus: special fire behaviour requirements - vertical flame propagation, smoke density, and combustion gas properties are central to the standard’s test regime.
• Materials defined: thermoplastic PVC, cross‑linked polyethylene (XLPE), cross‑linked ethylene‑propylene rubber (EPR), ethylene copolymers, and chlorinated elastomeric compounds.
• Construction elements addressed: conductors, insulation, fillers/tapes, inner coverings, metallic coverings/armour, oversheaths and non‑metallic components for halogen‑free cables.
• Test references: relies on EN/IEC test methods for cables under fire conditions and material tests (EN 50265, EN 50266, EN 50267, EN 50268, EN 60811, HD 21/22/383/605, IEC 60096‑1). These specify procedures for flame propagation, gas acidity/halogen content, and smoke measurement.
• Exclusions: cables intended for nuclear containment areas (LOCA) or radiation‑resistant designs are explicitly excluded.

Practical applications and users

Who uses HD 604 S1:1994/A2:2002:

• Cable manufacturers specifying and qualifying designs for power plants and substations.
• Design and installation engineers selecting fire‑performance cables for switchgear, generators, control rooms and distribution systems.
• Procurement and specification writers creating tenders and technical specifications that require harmonized fire performance.
• Testing laboratories and conformity assessors applying referenced EN/IEC methods during type and routine tests.
• Utilities, plant operators and regulators ensuring that installed cables meet fire safety and operational reliability objectives in power stations.

Practical benefits:

• Ensures consistent fire performance and material definitions across suppliers.
• Facilitates compliance with CENELEC harmonized requirements for power station environments.
• Improves safety by limiting flame spread, smoke and corrosive gases during cable combustion.

Related standards (selected)

• EN 50265 series - resistance to vertical flame propagation
• EN 50266 series - flame spread of bunched cables
• EN 50267 series - gases evolved during combustion (halogen acidity)
• EN 50268 series - smoke density measurement
• EN 60811 series - insulating and sheathing material tests
• HD 21 / HD 22 / HD 383 / HD 605, IEC 60096‑1

Keywords: HD 604 S1, power cables, fire performance, 0.6/1 kV, 1.9/3.3 kV, power stations, CENELEC, XLPE, EPR, PVC, halogen‑free, EN 50265.

Standards Content (Sample)

SLOVENSKI STANDARD
01-februar-2003
Elektroenergetski kabli za napetosti 0,6/1 kV in 1,9/3,3 kV s posebnimi
ognjevzdržnimi lastnostmi za uporabo v elektrarnah
0,6/1 kV and 1,9/3,3 kV power cables with special fire performance for use in power
stations
Starkstromkabel mit besonderen Eigenschaften im Falle eines Brandes für Kraftwerke
und einer Nennspannung von 0,6/1 kV und 1,9/3,3 kV
Câbles d'énergie 0,6/1 kV et 1,9/3,3 kV ayant un comportement au feu particulier et
destinés aux centrales électriques
Ta slovenski standard je istoveten z: HD 604 S1:1994/A2:2002
ICS:
13.220.40 Sposobnost vžiga in Ignitability and burning
obnašanje materialov in behaviour of materials and
proizvodov pri gorenju products
29.060.20 Kabli Cables
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

HARMONIZATION DOCUMENT HD 604 S1/A2
DOCUMENT D'HARMONISATION
HARMONISIERUNGSDOKUMENT October 2002
ICS 29.060.20; 13.220.40
English version
0,6/1 kV and 1,9/3,3 kV power cables
with special fire performance
for use in power stations
Câbles d'énergie 0,6/1 kV et 1,9/3,3 kV Starkstromkabel mit besonderen
ayant un comportement au feu particulier Eigenschaften im Falle eines Brandes für
et destinés aux centrales électriques Kraftwerke und einer Nennspannung von
0,6/1 kV und 1,9/3,3 kV
This amendment A2 modifies the Harmonization Document HD 604 S1:1994; it was approved by
CENELEC on 2002-07-01. CENELEC members are bound to comply with the CEN/CENELEC Internal
Regulations which stipulate the conditions for implementation of this amendment on a national level.
Up-to-date lists and bibliographical references concerning such national implementation may be obtained on
application to the Central Secretariat or to any CENELEC member.
This amendment exists in two official versions (English, French).
CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic,
Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta,
Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. HD 604 S1:1994/A2:2002 E

Page 0-2
Foreword
This second amendment to the Harmonization Document HD 604 S1:1994 was prepared by WG 9 of the
Technical Committee CENELEC TC 20 Electric Cable. CENELEC TC 20 confirmed at its Lucerne meeting
(May 2000) that the amendment should go to the Unique Acceptance Procedure.
As well as the listed additions and amendments to the particular sections of Parts 3-5, the whole of Part 1 has
been re-issued, especially to include the extensive changes to cross-references. Users of HD 604 should note
that, in the particular sections, cross-references have only been updated where the complete section has been
re-issued. This Part 0 of HD 604 contains a list of relevant changes to cross-references, which should be
consulted in conjunction with the particular section. National standards implementing one or more particular
sections of HD 604 may update cross-references in advance of changes to the published version of the HD.
The text of the draft was submitted to the Unique Acceptance Procedure and was approved by CENELEC as
amendment A2 to HD 604 S1 on 2002-07-01.
By decision of the Technical Board (D81/139), this HD exists only in English and French.
The following dates were fixed:
- latest date by which the existence of the amendment
has to be announced at national level (doa) 2003-01-01
- latest date by which the amendment has to be
implemented at national level by publication of a
harmonised national standard or by endorsement (dop) 2003-07-01
- latest date by which the national standards conflicting
with the amendment have to be withdrawn (dow) 2005-07-01

Page 0-3
CONTENTS
(HD 604 S1:1994 plus A1 and A2)
1), 5)
PART 1 General requirements
PART 3 Single core and multicore PVC insulated and sheathed cables
3-A Cables with copper and aluminium concentric conductors
1)
3-B Cables with copper or aluminium conductors, with or without metallic armour or
screen
1)
3-C Cables with circular copper conductors, with or without metallic covering
1), 5)
3-D Cables with copper or aluminium round or sector-shaped conductors and a
concentric conductor
2)
Cables with copper or aluminium conductors and wire or strip armour
3-E
3-F Cables with additional or amended requirements for oxygen index testing of
materials
PART 4 Single core and multicore XLPE or EPR insulated, PVC or chlorinated elastomer sheathed
cables
4-A Cables with copper and aluminium solid or stranded conductors
1)
4-B Cables with copper or aluminium conductors and tape armour
1)
4-C Cables without metallic covering, having circular copper conductors
1), 5)
4-D Cables with copper and aluminium conductors; unarmoured, armoured or double-
screened
2)
Cables with copper and aluminium conductors, and wire or strip armour
4-E
4-F Cables with additional or amended requirements for oxygen index testing of
materials
PART 5 Single core and multicore halogen free cables
1)
5-A Cables with copper or aluminium conductors with or without metallic covering or
screen
1)
5-B Unarmoured cables with copper conductors
1), 5)
5-C Cables with copper or aluminium conductors: unarmoured, armoured or double
screened
5-D Cables with copper and aluminium conductors and a metallic covering
2)
Cables with copper or aluminium conductors and wire armour
5-E
5-F Cables with copper or aluminium conductors either solid or stranded
1), 5)
5-G Cables with copper conductors and optional copper concentric conductor
1)
5-H Cables with copper conductors, with and without concentric copper conductors, and
with optional armouring
4)
5-I One to four core cables having aluminium or copper conductors
5-J Cables with additional or amended requirements for oxygen index testing of
materials
3)
5-K Cables with copper or aluminium conductors and optional copper concentric
conductors or screens
1)
Amendment no. 1 introduces some changes to the text.
2)
Amendment no. 1 completely revises the particular section.
3)
New section introduced by Amendment no. 1.
4)
Amendment no. 2 introduces some changes to the text.
5)
Amendment no. 2 completely revises the particular part or section.

Page 0-4
Page 0-4
List of updated cross-references
Original Ref Original title New Ref New title
HD 186 Marking by inscription for the identification of EN 50334 Marking by inscription for the identification of cores of
cores of electric cables having more than 5 electric cables
cores
HD 405.1 Tests on electric cables under fire conditions EN 50265-2-1 Common test methods for cables under fire conditions –
Part 1: Test on a single vertical insulated wire or Test for resistance to vertical flame propagation for a
cable single insulated conductor or cable
Part 2-1: Procedures – 1 kW pre-mixed flame
HD 405.3 Tests on electric cables under fire conditions EN 50266 (series) Common test methods for cables under fire conditions –
Part 3: Tests on bunched wires or cables Test for vertical flame spread of vertically-mounted
bunched wires or cables
HD 505 (series) Common test methods for insulating and EN 60811 (series) Insulating and sheathing materials of electric cables –
sheathing materials of electric cables Common test methods
HD 602 Test on gases evolved during combustion of EN 50267-2-2 Common test methods for cables under fire conditions –
materials from cables – Determination of degree Test on gases evolved during combustion of materials
of acidity (corrosivity) of gases by measuring pH from cables
and conductivity Part 2-2: Procedures – Determination of degree of
acidity of gases for materials by measuring pH and
conductivity
HD 606 (series) Measurement of smoke density of electric EN 50268 (series) Common test methods for cables under fire conditions –
cables burning under defined conditions Measurement of smoke density of cables burning under
defined conditions
IEC 502 Extruded solid dielectric insulated power cables IEC 60502-1 Power cables with extruded insulation and their
accessories for rated voltages from 1 kV (U = 1,2 kV)
for rated voltages from 1 kV to 30 kV
m
up to 30 kV (U = 36 kV)
m
Part 1: Cables for rated voltages of 1 kV (U = 1,2 kV)
m
and 3 kV (U = 3,6 kV)
m
IEC 754-1 Test on gases evolved during combustion of EN 50267-2-1 Common test methods for cables under fire conditions –
electric cables Tests on gases evolved during combustion of materials
Part 1: determination of the amount of halogen from cables – Part 2-1: Procedures – Determination of
acid gas evolved during the combustion of the amount of halogen acid gas
polymeric materials taken from cables

Page 1-0
Part 1
PART 1: GENERAL REQUIREMENTS
Replace the complete part by the following.

Page 1-1
Part 1
0,6/1 kV AND 1,9/3,3 kV POWER CABLES WITH SPECIAL FIRE PERFORMANCE
FOR USE IN POWER STATIONS
PART 1: GENERAL REQUIREMENTS
Page 1-2
Part 1
REFERENCES
References are made in this Part 1 to other parts of HD 604 and to other Harmonization Documents and
International Standards as follows:
EN 50265 (Series) Common test methods for cables under fire conditions – Test for resistance to vertical
flame propagation for a single insulated conductor or cable
EN 50266 (Series) Common test methods for cables under fire conditions – Test for vertical flame spread
of vertically-mounted bunched wires or cables
EN 50267 (Series) Common test methods for cables under fire conditions - Tests on gases evolved
during combustion of materials from cables
EN 50268 (Series) Common test methods for cables under fire conditions - Measurement of smoke
density of cables burning under defined conditions
EN 50334 Marking by inscription for the identification of cores of electric cables
EN 60811 (Series) Insulating and sheathing materials of electric cables - Common test methods
HD 21 Polyvinyl chloride insulated cables of rated voltages up to and including 450/750V
HD 22 Rubber insulated cables of rated voltages up to and including 450/750V
HD 383 Conductors of insulated cables – First supplement: Guide to the dimensional limits of
circular conductors
HD 605 Electric cables – Additional test methods
IEC 60096-1 Radio frequency cables
Part 1: General requirements and measuring methods

Page 1-3
Part 1
Contents
1 General.4
1.1 Scope .4
1.2 Object.4
2 Definitions.4
2.1 Definitions relating to insulating and sheathing compounds .4
2.2 Definitions relating to the tests .5
2.3 Rated voltage .5
3 Marking.5
3.1 Indication of origin.5
3.2 Additional marking .6
3.3 Durability .6
3.4 Legibility .6
3.5 Common marking.6
3.6 Use of the name CENELEC.6
4 Core identification .6
5 General requirements for the construction of cables .6
5.1 Conductors .6
5.2 Insulation.7
5.3 Fillers and tapes.7
5.4 Inner covering (bedding) .7
5.5 Inner sheath.8
5.6 Metallic coverings .8
5.7 Oversheath.8
5.8 Non-metallic components of halogen free cables.9
6 Tests on complete cables.9
7 (spare) .9
8 (spare) .9
9 Guide to use and selection of cables.9

Page 1-4
Part 1
0,6/1,0 kV and 1,9/3,3 kV power cables with special fire performance
for use in power stations
Part 1: General requirements
1 General
1.1 Scope
HD 604 applies to rigid and flexible conductor cables for fixed installations having a rated voltage Uo/U of
0,6/1,0 kV or 1,9/3,3 kV. The insulation and sheaths may be either thermoplastic or thermosetting, halogenated
or halogen free. The cables are mainly intended for use in power generating plants and sub-stations. All cables
have specific fire performance requirements. Cables designed to be installed within the containment area of
nuclear power plants (LOCA cables), or cables specifically designed to be radiation resistant are not included in
this HD.
Control cables having a minimum conductor size of 1mm² up to 61 cores are included in addition to the range
of power supply cables.
This Part 1 specifies the general requirements applicable to these cables; additional or deviating requirements
are given in the particular sections of this HD.
Test Methods are specified in EN 50265, EN 50266, EN 50267, EN 50268, EN 60811, HD 21, HD 22, HD 383,
HD 605 and IEC 60096-1
The particular types of cables are specified in Parts 3, 4 and 5.
1.2 Object
The objects of this Harmonization Document are:
- to standardise cables that are safe and reliable when properly used, in relation to the technical
requirements of the system of which they form a part;
- to state the characteristics and manufacturing requirements directly or indirectly bearing on safety,
- and to specify methods for checking conformity with those requirements.
2 Definitions
2.1 Definitions relating to insulating and sheathing compounds
2.1.1
insulating and sheathing compounds
the types of insulating and sheathing compounds covered in this HD are listed below, together with their
abbreviated designations
2.1.1.1
thermoplastic Polyvinyl Chloride compound (PVC)
combinations of materials suitably selected, proportioned and treated, of which the characteristic constituent is
polyvinyl chloride or one of its copolymers. The same term also designates compounds containing both
polyvinyl chloride and certain of its copolymers
2.1.1.2
cross-linked Ethylene Propylene Rubber (EPR)
a compound based on ethylene propylene rubber or similar (EPM or EPDM) which when cross-linked complies
with the requirements given in the particular sections
2.1.1.3
cross-linked Polyethylene (XLPE)
a thermosetting material formed by the cross-linking of thermoplastic polyethylene compound either by
chemical or irradiation methods so as to comply with the requirements given in the particular sections
2.1.1.4
ethylene copolymers
thermoplastic or cross-linked materials in which the characteristic constituent is a copolymer of ethylene such
as EVA, EEA, EMA, compounded so as to comply with the requirements given in the particular sections

Page 1-5
Part 1
2.1.1.5
chlorinated synthetic elastomeric compound
a vulcanised compound in which the characteristic constituent is polychloroprene rubber (PCP) or other
chlorinated synthetic elastomer, such as CSP, CPE or NBR/PVC, compounded so as to comply with the
requirements given in the particular sections;
NOTE The abbreviations PCP, CSP and CPE are those in common use. Equivalent codings according to ASTM are CR, CSM and CM.
2.1.2
type of compound
the category in which a compound is placed according to its properties, is determined by specific tests. The
type designation is not directly related to the composition of the compound
2.2 Definitions relating to the tests
NOTE Tests classified as Sample (S) or Routine (R) may be required as part of any Type Approval Schemes.
2.2.1
type tests (symbol T)
tests required to be made before supplying a type of cable covered by this HD on a general commercial basis
in order to demonstrate satisfactory performance characteristics to meet the intended application. These tests
are of such a nature that, after they have been made, they need not be repeated unless changes are made in
the cable material, design or type of manufacturing process which might change the performance
characteristics
2.2.2
sample tests (symbol S)
tests made on selected lengths of completed cable, on samples of completed cable, or components taken from
a completed cable adequate to verify that the finished product meets the design specifications
2.2.3
routine test (symbol R)
tests made on all production cable lengths to demonstrate their integrity
2.2.4
tests after installation
tests intended to demonstrate the integrity of the cable and its accessories as installed
2.3
rated voltage
the rated voltage of a cable is the reference voltage for which the cable is designed, and which serves to define
the electrical tests.
The rated voltage is expressed by the combination of the following values U /U(U ) expressed in kV:
0 m
-U is the r.m.s value between any insulated conductor and earth (metallic covering of the cable or the
surrounding medium) - U = 0,6 kV or 1,9 kV;
-U is the r.m.s. value between any two phase -conductors of a multicore cable or of a system of single-core
cables - U = 1,0 kV or 3,3 kV;
-U is the max. r.m.s. value of the highest system voltage for which the equipment may be used - U = 1,2
m m
kV or 3,6 kV.
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.
If used in dc systems, the 0,6/1,0 kV cables of this HD shall have a maximum voltage against earth not
exceeding 1,9 kV
NOTE The suitability of cables rated 1,9/3,3 kV for use in d.c. systems should be confirmed with the manufacturer before installation.
3 Marking
3.1 Indication of origin
Cables shall be provided with an identification of origin consisting of:
1) either the manufacturer's identification thread, or
2) the continuous marking of the manufacturer's name or trademark, or (if legally protected) identification
number by one of the three following methods:
a) printed tape within the cable;
b) printing in a contrasting colour on the insulation of at least one core;
c) printing, indenting or embossing on the outer surface of the cable.

Page 1-6
Part 1
3.1.1 Continuity of marks
Unless otherwise specified in the particular section, each specified mark shall be regarded as continuous if the
distance between the end of the mark and the beginning of the next identical mark does not exceed:
- 550 mm if the marking is on the outer surface of the cable,
- 275 mm if the marking is:
i) on the insulation of a sheathed cable,
ii) on a tape within a sheathed cable.
NOTE A "Specified Mark" is any mandatory mark covered by this part of the HD or by the particular requirements of Part 3 onwards of
this HD.
The diagram below shows an example of the marking as used on the outer surface of the cable, where the
word "ORIGIN" is for the mandatory information required for 3.1, and "XYZ" is one of any other mandatory
marks.
3.2 Additional marking
Additional marking requirements may be specified in the particular sections.
3.3 Durability
Printed markings shall be durable. Compliance with this requirement shall be checked by the test given in
subclause 2.5.4 of HD 605.
The printed legend shall be legible after carrying out the test.
3.4 Legibility
All markings shall be legible. Printed markings shall be in contrasting colours.
All colours of the identification thread shall be easy to recognise or easily be made recognisable, if necessary,
by cleaning with a suitable solvent.
3.5 Common marking
Under consideration.
3.6 Use of the name CENELEC
The name CENELEC, in full or abbreviated, shall not be directly marked on, or in, the cables.
4 Core identification
The cores shall be identified by colours or numbers when specified in the particular sections. Colouring shall be
achieved by the use of coloured insulation or by a coloured surface.
When identification is by numbers, they shall be printed in a colour which contrasts with the core colours.
Marking shall comply with EN 50334 unless otherwise specified.
The colours shall be clearly identifiable and durable. Durability shall be checked by the test given in subclause
2.5.4 of HD 605.
Compliance with these requirements shall be verified by visual examination.
5 General requirements for the construction of cables
5.1 Conductors
5.1.1 Material
Conductors shall be either plain or metal-coated annealed copper or plain aluminium in accordance with
HD 383, and with particular requirements in particular sections.

Page 1-7
Part 1
5.1.2 Construction
The maximum diameters of the wires of flexible conductors, and the minimum number of the wires of rigid
conductors, shall be in accordance with HD 383, unless otherwise specified in the particular sections.
The classes of the conductors relevant to the various types of cables are given in the particular sections.
Conductors shall be either circular or sector in shape, and of solid metal or stranded.
5.1.3 Check of construction
Compliance with the requirements of 5.1.1 and 5.1.2 including the requirements of HD 383, shall be checked
by inspection and by measurement.
5.1.4 Electrical resistance
The resistance of each conductor at 20 �C shall be in accordance with the requirements of HD 383 for the
given class of conductor.
Compliance shall be checked by the test given in subclause 3.1.1 of HD 605.
5.1.5 Separator layer
A separator layer may be placed between the conductor and insulation. Unless otherwise specified, it shall
be non-hygroscopic
It shall be easily removable from the conductor.
5.2 Insulation
5.2.1 Material
The insulation shall be a compound as specified for each type of cable in the particular sections.
The test requirements and the references to test methods are specified in the particular sections.
The maximum conductor temperature in normal operation and the short circuit temperature for each
insulation are specified in the particular sections.
5.2.2 Application
The insulation may consist of one or more bonded layers. It shall be so applied that it fits closely on the
conductor or over the separator tape, and it shall be possible to remove it without damage to the insulation
itself, to the conductor or to the metal coating if any. If required, compliance shall be checked by inspection
and by manual test. The insulation shall be applied by a suitable extrusion process, cross-linked where
required, and shall form a compact and homogeneous body.
5.2.3 Thickness
The mean value of the thickness of insulation shall not be less than the specified value for each type and
size of cable shown in the tables of the particular sections.
However, the thickness at any one place may be less than the specified value provided that the difference
does not exceed 0,1 mm + 10 % of the specified value.
Compliance shall be checked by the test given in subclause 2.1.1 of HD 605.
5.3 Fillers and tapes
For each type of cable, the particular sections specify whether that cable includes fillers or tapes or whether
the sheath or inner covering may penetrate between the cores, thus forming a filling.
Tapes may be applied as separators over the insulation of an individual core or as a binder over the core
assembly.
5.3.1 Material
The fillers and tapes, if any, shall be composed of a suitable material.
When fillers or tapes are employed, there shall be no harmful interactions between their constituents and the
insulation and/or the sheath.
Compliance with this requirement shall be checked by the test specified in the particular section.
5.3.2 Application
Where fillers are used these may be applied either separately or as part of the inner covering or the inner
sheath to form a compact and reasonably circular cable. It shall be possible to strip the fillers, if any, from the
cable without damaging the insulation of cores.
5.4 Inner covering (bedding)
The inner covering, if any, may be extruded or lapped or a combination of the two.

Page 1-8
Part 1
5.4.1 Material
The material used for inner coverings shall be suitable for use at the maximum conductor temperature of the
cable in normal operation, and compatible with the cable components with which it is in contact.
Compliance with this requirement shall be checked by the test specified in the particular section.
5.4.2 Application
The extruded inner covering shall surround the core assembly completely and may penetrate the spaces
between them, giving the assembly a reasonably circular shape. The extruded inner covering shall be easily
separable from the cores.
Lapped beddings shall consist of one or more layers of tape covering the entire outer surface of the core
assembly.
For each type of cable, the particular sections indicate whether that cable includes an extruded inner
covering or a lapped bedding or a combination of these.
5.4.3 Thickness
Unless otherwise stated in the particular sections no measurement is required for the extruded or lapped
inner covering.
5.5 Inner sheath
An inner sheath may be specified in the particular sections.
5.5.1 Material
The material used for the extruded inner sheath shall be suitable for use at the maximum conductor
temperature of the cable in normal operation, and compatible with the cable components with which it is in
contact.
The requirements and references to the test methods are specified in the particular sections.
5.5.2 Application
The inner sheath shall be extruded in a single layer. The sheath may be applied over an inner covering, or
directly over the core assembly. The sheath shall not adhere to the cores.
5.5.3 Thickness
The thickness of the extruded inner sheath shall be as specified in the particular sections.
5.6 Metallic coverings
5.6.1 Type of metallic layers
The following types of metallic layers may be specified in particular sections:
a) metallic screen,
c) metallic armour,
d) a combination of the above.
Detailed constructions of metallic coverings, together with test methods and requirements, are specified in
the particular sections.
5.6.2 Application
The metallic layers may be applied over an inner covering or inner sheath, as specified in the particular
sections.
5.7 Oversheath
5.7.1 Material
The oversheath shall be a compound suitable for use at the maximum conductor temperature of the cable in
normal operation, and of the type specified for each type of cable in the particular sections.
The test requirements and the references to test methods for these compounds are specified in the particular
sections.
5.7.2 Application
The oversheath shall be extruded and may consist of one or more layers.
For unarmoured cables the sheath shall not adhere to the cores.
A separator, consisting of a film or tape, may be placed under the oversheath.
5.7.3 Thickness
Unless otherwise specified in the particular section the following requirements shall apply.

Page 1-9
Part 1
5.7.3.1 Sheath applied over smooth surface
For a sheath applied on a smooth cylindrical surface, such as an inner covering, a metal sheath or the
insulation of a single core, the mean value of the thickness of the oversheath shall not be less than the
specified value for each type and size of cable shown in the tables of the particular section.
However, the thickness at any place may be less than the specified value provided that the difference does
not exceed 0,1 mm + 15 % of the specified value.
Test methods are specified in subclause 2.1.2 of HD 605.
5.7.3.2 Sheath applied over uneven surface
For a sheath applied on an irregular cylindrical surface, such as a penetrating sheath on an unarmoured
cable without inner covering or a sheath applied directly over armour, metallic screen or concentric
conductor, the smallest thickness at any point of the oversheath shall not fall below the value given in the
appropriate particular sections by more than 0,2 mm + 20 % of the specified value.
Test methods are specified in subclause 2.1.2 of HD 605.
5.8 Non-metallic components of halogen free cables
All non-metallic components shall be halogen free. This shall be checked by one of the tests specified in
EN 50267 unless otherwise specified in the particular section.
6 Tests on complete cables
All cables shall comply with the requirements given in the particular sections.
7 (spare)
8 (spare)
9 Guide to use and selection of cables
For guidance on the use of cables, see particular sections of this HD.
When selecting cables, attention is drawn to the fact that national conditions or regulations covering,
e.g.climatic conditions or installation requirements, may exist. These should therefore be followed in
conjunction with this HD.
Page 1-10
Part 1
BLANK PAGE
Page 3-D-0
Part 3 Section D
SECTION D: CABLES WITH COPPER OR ALUMINIUM ROUND OR SECTOR SHAPED CONDUCTORS
AND A CONCENTRIC CONDUCTOR
Replace the complete section by the following.

Page 3-D-1
Part 3 Section D
SECTION D: CABLES WITH COPPER OR ALUMINIUM ROUND OR SECTOR-SHAPED
CONDUCTORS AND A CONCENTRIC CONDUCTOR
CONTENTS
Page
1 Scope.3-D-2
2 Additional general requirements
2.1 Identification of cores.3-D-2
2.2 Splicing during manufacture.3-D-2
2.3 Cable marking.3-D-3
2.4 Additional test requirement.3-D-4
3 (Not applicable) .3-D-5
4 Cables with metallic covering
4.1 Code designation .3-D-5
4.2 Rated voltage.3-D-5
4.3 Construction.3-D-6
4.4 Tests.3-D-7
Appendix: Guide to use.3-D-17
Tables 1 - 9 .3-D-8
--------------------
REFERENCES
References are made, in this Section D of Part 3 of HD 604, to other parts of this HD and to other
Harmonization Documents and International Standards as follows:
EN 50265-2-1 Common test methods for cables under fire conditions - Test for resistance to
vertical flame propagation for a single insulated conductor or cable
Part 2-1: Procedures - 1 kW pre-mixed flame
EN 50266-2-3 Common test methods for cables under fire conditions - Test for vertical flame
spread of vertically-mounted bunched wires or cables
Part 2-3: Procedures - Category B
EN 50334 Marking by inscription for the identification of cores of electric cables
EN 60811 (Series) Insulating and sheathing materials of electric cables - Common test methods
HD 21 Polyvinyl chloride insulated cables of rated voltages up to and including 450/750 V
HD 383 Conductors of insulated cables - First supplement: Guide to the dimensional limits of
circular conductors
HD 605 Electric cables - Additional test methods
IEC 60502-1 Power cables with extruded insulation and their accessories for rated voltages from
= 1,2 kV) up to 30 kV (U = 36 kV)
1 kV (U
m m
Part 1: Cables for rated voltages of 1 kV (U = 1,2 kV) and 3 kV (U = 3,6 kV)
m m
In all cases, reference to another HD or International Standard implies the latest edition of that document.

Page 3-D-2
Part 3 Section D
SECTION D
1Scope
This section specifies requirements for and dimensions of single core and multi-core PVC insulated and
sheathed cables having reduced fire propagation performance.
The maximum continuous conductor temperature shall not exceed 70 �C. The maximum temperature
for short-circuit conditions is 150 �C.
This section covers the following class of cable:
1, 2, 3 and 4 core cables having copper or aluminium, round or sector shaped conductors and a
concentric conductor.
2 Additional general requirements
The following general requirements shall be read in conjunction with those given in Part 1.
2.1 Identification of cores
The cores of all cables shall be identified preferably by numbers, or alternatively by colours, in
accordance with the following sequence:
Number of cores Numbers Colours
One - Black
Two 1, 4 Black, blue
Three 1, 2, 3 Black, brown, black
Four 1, 2, 3, 4 Black, brown, black, blue
When numbers are used the colour of the core shall be black. Spacing and dimensions of
numbers shall be in accordance with EN 50334, clause 5. Single core cables need no number.
When colours are used in multi-core cables, one of the black cores, corresponding to number
1, may be provided with a white stripe. The width of this stripe shall be as follows:
- when the circumference of the core is equal to or less than 10 mm the width shall be
(0,5 ± 0,1) mm;
- when the circumference of the core is bigger than 10 mm the width shall be not less than
0,5 mm and not more than 5 % of the circumference.
2.2 Splicing during manufacture
Splicing during manufacture shall be done in such a way that all requirements in this
specification regarding construction and testing are fulfilled.
Conductors and concentric conductors may be spliced by welding or other equivalent methods.
Solid aluminium conductors of class 1 may, however only be spliced by MIG-welding,
TIG-welding or an equivalent method.

Page 3-D-3
Part 3 Section D
2.3 Cable marking
The method of cable marking shall comply with clause 3 of Part 1 and the following additional
requirements:
2.3.1 External marking
The external surface of all cables shall be legibly marked with the following elements
of marking:
Element Example of marking
a) Code designation in XXXX
accordance with 4.1
b) Number and cross-section 3 x 150/41
of conductors and cross-
section of concentric
conductor
c) Rated voltage (U)1 kV
d) Year of manufacture 91
(two last digits)
The marking shall be made by printing, embossing or indenting on the oversheath.
The marking, if printed, must be resistant to conditions in the ground.
The sequence of marks shall be as given above and the marks shall be kept together
in a group.
The distance between groups of marks shall not exceed 1 m.
2.3.2 Meter marking
A meter marking with reasonable accuracy shall be applied on the oversheath and in
such a way that it does not interfere with the marking in 2.3.1.
2.3.3 The mark of an Approval Organisation
If the mark of an Approval Organisation is used on the cable it shall be provided
throughout the length of the cable and in such a way that it does not interfere with
other markings.
If the mark is applied on the oversheath the distance between marks shall not exceed
1 m.
As an alternative to the mark of Approval Organisation, an identification thread may be
incorporated into the cable, as specified by the Approval Organisation.
2.3.4 Optional marking
The use of optional marking is permitted. Where such marking is made it shall be
throughout the length of the cable, and may be on the external surface of the cable, or
by means of a tape or thread within the cable, or by a combination of these methods.
If the additional marking is applied to the surface of the cable it shall not interfere with
the marking specified in 2.3.1 to 2.3.3.
The additional marking, however made, shall be repeated at intervals not exceeding
1 m.
Page 3-D-4
Part 3 Section D
2.4 Additional test requirements
2.4.1 Sampling for thickness measurement
The measurements of thickness of insulation and oversheath, listed in Table 2,
Schedule of tests, shall be made on two samples of cable, taken one from each end of
the cable selected for the test, having discarded any portion which may have suffered
damage.
If any of the thicknesses measured does not comply with the requirements in 4.3.2
and 4.3.5, then two further samples shall be checked for the non-compliant items. If
both samples meet the specified requirements the cable is deemed to comply, but if
either does not meet the requirements, the cable is deemed not to comply.
2.4.2 Voltage test
2.4.2.1 Voltage test on oversheath
When testing the oversheath in water in accordance with HD 605,
subclause 3.2.3.1, the following test conditions shall apply:
- length of test cable: not less than 10 m;
- test voltage between concentric conductor and water: 4 kV a.c.;
- duration of test: 4 h.
The cable shall be immersed in the water for at least one hour before the
test voltage is applied.
No breakdown shall occur.
2.4.2.2 Voltage test on cores
When testing the cores according to HD 605, subclause 3.2.2.2, the
following test conditions shall apply:
- length of cores: not less than 10 m;
- test voltage: 4 kV a.c.;
- duration of test: 4 h.
No breakdown shall occur.
2.4.2.3 Spark test on oversheath
When spark-testing the oversheath in accordance with HD 21.2, subclause
2.6.1, the speed of the cable and length of the electrode shall be chosen
so that the dwelling-time of each point of the cable in the electrical field is
at least 0,1 s. The test voltage shall be either 8 kV a.c. or 15 kV d.c.
No breakdown shall occur.
Page 3-D-5
Part 3 Section D
2.4.2.4 Voltage test on completed cable
When the cable is tested in accordance with HD 605, subclause 3.2.1, the
test voltage shall be 3,5 kV a.c. and the duration five minutes. Alternatively
the test voltage may be 15 kV d.c. and the duration one minute.
No breakdown shall occur.
2.4.3 Insulation resistance
When the cable cores are tested in accordance with subclause 3.3.1 of HD 605 at
70�C, the volume resistivity shall not be less than 10 �cm.
2.4.4 Tests related to fire conditions
This is a type test which shall be performed on the cable with the smallest conductor
cross-section of the cable type to be covered by the test and, when appropriate, on
the cable with the smallest number of cores. When testing cables in accordance with
EN 50266 separate tests shall be made for cables with conductor cross-sections up to
and including 35 mm and for cables with conductor cross-sections greater than
35 mm , if such cross-sections are to be covered by the type test. If materials or
designs of the cable type to be tested varies with the conductor cross-section or with
the number of cores or if there are other deviations within the type series, then the
different designs have to be tested separately.
The complete cable shall meet the following fire propagation test requirements:
a) single core cables with conductor cross-sections of all sizes and multi-core
cables with conductor cross-sections up to and including 16 mm .
When tested according to EN 50265-2-1, the requirements for the test method
shall be met;
b) multi-core cables with conductor cross-sections exceeding 16 mm .
When tested according to EN 50266-2-3, the requirements for the test method
shall be met.
3 Cables without metallic covering
Not applicable.
4. Cables with metallic covering
4.1 Code designation
(under consideration by TC 20)
4.2 Rated voltage
0,6/1 kV.
...