IEC 60092-376:2025

IEC 60092-376 ®
Edition 4.0 2025-04
REDLINE VERSION
INTERNATIONAL
STANDARD
Electrical installations in ships –
Part 376: Cables for control and instrumentation circuits 150/250 V (300 V)

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IEC 60092-376 ®
Edition 4.0 2025-04
REDLINE VERSION
INTERNATIONAL
STANDARD
Electrical installations in ships –
Part 376: Cables for control and instrumentation circuits 150/250 V (300 V)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 47.020.60 ISBN 978-2-8327-0406-6

– 2 – IEC 60092-376:2025 RLV © IEC 2025
CONTENTS
FOREWORD . 4
1 Scope and object . 6
2 Normative references . 6
3 Terms and definitions . 7
4 General requirements . 7
4.1 Rated voltage . 7
4.2 Markings . 8
4.2.1 Indication of origin and voltage identification . 8
4.2.2 Continuity of marking . 8
4.2.3 Core identification . 8
5 Construction requirements . 9
5.1 General description . 9
5.1.1 Overview . 9
5.1.2 Unarmoured single- or double-sheathed cable . 9
5.1.3 Armoured single-sheathed cable with outer sheath only . 9
5.1.4 Armoured double-sheathed cable with inner and outer sheath only . 9
5.1.5 Armoured single-sheathed cable with inner sheath only . 9
5.2 Conductors . 10
5.3 Insulation . 10
5.3.1 Material . 10
5.3.2 Application . 10
5.3.3 Thickness of insulation . 10
5.4 Cabling . 11
5.4.1 General . 11
5.4.2 Core assembly . 11
5.4.3 Forming pair, triple, or quad units . 11
5.4.4 Fillers . 12
5.4.5 Number of cores, pair, triple, or quad units . 12
5.5 Inner covering . 12
5.5.1 General . 12
5.5.2 Thickness of inner covering . 12
5.6 Screen . 12
5.6.1 Individual screen . 12
5.6.2 Collective electrostatic screen . 14
5.7 Inner sheath . 15
5.7.1 Material . 15
5.7.2 Application . 15
5.7.3 Thickness of inner sheath . 15
5.8 Braid armour . 15
5.8.1 General . 15
5.8.2 Braid wire diameter . 15
5.8.3 Coverage density . 16
5.8.4 Application of the armour . 16
5.9 Outer sheath . 16
5.9.1 Material . 16
5.9.2 Application . 16
5.9.3 Thickness of outer sheath . 16

5.9.4 Colour of outer sheath . 16
5.10 Construction for special applications . 17
5.10.1 Cables for installation in explosive atmosphere areas . 17
5.10.2 Cables for installation between areas with and without explosive
atmospheres . 17
6 Tests – Methods and requirements . 17
6.1 General . 17
6.2 Tests on cables for installation in explosive atmospheres . 20
6.3 Tests on cables for installation between areas with and without explosive

atmospheres . 20
Annex A (informative) Core identification . 21
Annex B (informative) Identification of cores of multicore cables . 22
B.1 Inscription Marking . 22
B.2 Arrangement of the marks . 22
B.3 Spacing and dimensions of the marks . 22
B.4 Appearance of inscription marking . 23
Annex C (informative) Number of cores, pair, triple or quad units . 24
C.1 Number of cores . 24
C.2 Number of pair, triple, or quad units . 24
Bibliography . 25

Figure B.1 – Arrangement of the marks . 22

Table 1 – Electrical resistance of conductors . 10
Table 2 – Insulation thickness . 11
Table 3 – Thickness of inner covering . 12
Table 4 – Drain wire requirements . 13
Table 5 – Tests applicable to all cables . 17
Table 6 – Additional tests required for halogen-free cables . 19
Table 7 – Additional test required for low smoke cables . 19
Table 8 – Additional tests required for fire resistant cables . 19
Table 9 – Additional tests required for specific performances . 20
Table 10 – Additional test for cables for installation between areas with and without
explosive atmospheres . 20
Table A.1 – Preferred colour code for single unit cables . 21
Table B.1 – Dimensions of the marks . 23

– 4 – IEC 60092-376:2025 RLV © IEC 2025
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICAL INSTALLATIONS IN SHIPS –

Part 376: Cables for control and instrumentation circuits 150/250 V (300 V)

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
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6) All users should ensure that they have the latest edition of this publication.
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
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the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
This redline version of the official IEC Standard allows the user to identify the changes
made to the previous edition IEC 60092-376:2017. A vertical bar appears in the margin
wherever a change has been made. Additions are in green text, deletions are in
strikethrough red text.
IEC 60092-376 has been prepared by subcommittee 18A: Electric cables for ships and mobile
and fixed offshore units, of IEC technical committee 18: Electrical installations of ships and of
mobile and fixed offshore units. It is an International Standard.
This fourth edition cancels and replaces the third edition published in 2017. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) addition of a colour code for wires and tapes for unit identification;
b) addition of the core numbering for multicore cables;
c) addition of design and test requirements for cables to be installed in explosive atmosphere
areas;
d) addition of the design and test requirements for cables to be installed between areas with
and without explosive atmospheres.
The text of this International Standard is based on the following documents:
Draft Report on voting
18A/496/FDIS 18A/502/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.
A list of all parts in the IEC 60092 series, published under the general title Electrical installations
in ships, can be found on the IEC website.
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/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, or
• revised.
– 6 – IEC 60092-376:2025 RLV © IEC 2025
ELECTRICAL INSTALLATIONS IN SHIPS –

Part 376: Cables for control and instrumentation circuits 150/250 V (300 V)

1 Scope and object
This part of IEC 60092 applies to screened and unscreened cables for control and
instrumentation circuits on ships and offshore units. The cables have an extruded solid
insulation with a voltage rating of 150/250 V (300 V) (see Clause 4) and are intended for fixed
installations.
The various types of cables are given in Clause 5. The constructional requirements and test
methods are aligned with those indicated in IEC 60092-350, unless otherwise specified in this
document.
This document
– standardizes cables whose safety and reliability are ensured when they are installed in
accordance compliance with the requirements specified in IEC 60092-352,
– lays down standard manufacturing construction requirements and characteristics of such
cables directly or indirectly bearing on safety, and
– specifies test methods for checking conformity with those requirements.
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 – Part 461: Electric cables
IEC 60079-14:2013, Explosive atmospheres – Part 14: Electrical installations design, selection
and installation of equipment, including initial inspection
IEC 60092-350:20142020, Electrical installations in ships – Part 350: General construction and
test methods of power, control and instrumentation cables for shipboard and offshore
applications
IEC 60092-352, Electrical installations in ships – Part 352: Choice and installation of electrical
cables
IEC 60092-360:20142021, Electrical installations in ships – Part 360: Insulating and sheathing
materials for shipboard and offshore units, power, control, instrumentation and
telecommunication cables
IEC 60331-1, Tests for electric cables under fire conditions – Circuit integrity – Part 1: Test
method for fire with shock at a temperature of at least 830 °C for cables of rated voltage up to
and including 0,6/1,0 kV and with an overall diameter exceeding 20 mm
IEC 60331-2, Tests for electric cables under fire conditions – Circuit integrity – Part 2: Test
method for fire with shock at a temperature of at least 830 °C for cables of rated voltage up to
and including 0,6/1,0 kV and with an overall diameter not exceeding 20 mm

IEC 60331-21, Tests for electric cables under fire conditions – Circuit integrity – Part 21:
Procedures and requirements – Cables of rated voltage up to and including 0,6/1,0 kV
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 60332-3-22, Tests on electric and optical fibre cables under fire conditions – Part 3-22:
Test for vertical flame spread of vertically-mounted bunched wires or cables – Category A
IEC 60445, Basic and safety principles for man-machine interface, marking and identification –
Identification of equipment terminals, conductor terminations and conductors
IEC 60684-2, Flexible insulating sleeving – Part 2: Methods of test
IEC 60754-1, Test on gases evolved during combustion of materials from cables – Part 1:
Determination of the halogen acid gas content
IEC 60754-2, Test on gases evolved during combustion of materials from cables – Part 2:
Determination of acidity (by pH measurement) and conductivity
IEC 61034-2, Measurement of smoke density of cables burning under defined conditions –
Part 2: Test procedure and requirements
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60092-350 and
IEC 60050-461 apply.
ISO and IEC maintain terminology databases for use in standardization at the following
addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
4 General requirements
4.1 Rated voltage
The standard method of designating the rated voltages of cables covered by this document
shall take the form U / U (U ),
o m
where
U is the rated power-frequency voltage between phase conductors and earth or metallic
o
screen, for which the cable is designed;
U is the rated power-frequency voltage between phase conductors for which the cable is
designed;
U is the maximum value of the "highest system voltage" for which the equipment (including
m
cable) may can be used (see IEC 60038).
All voltages are given as RMS values.

– 8 – IEC 60092-376:2025 RLV © IEC 2025
The standard rated voltages U / U (U ) of the cables considered in this document are:
o m
U / U (U ) = 150 V/250 V (300 V) AC
o m
For 150/250 (300) V cables, DC voltage up to a maximum of 1,5 times the AC voltage may be
used provided that the voltage to earth does not exceed 250 V.
NOTE When circuits are supplied from a low impedance source, attention is drawn to
IEC 60092-353 for 600/1 000 V cables having a minimum conductor size of 1,5 mm .
4.2 Markings
4.2.1 Indication of origin and voltage identification
Cables shall comply with IEC 60092-350:20142020, 4.1.3 with respect to:
• indication of origin;
• rated voltage and cable construction (number of cores and cross-sectional area of the
construction cable);
• continuity of marking;
• durability/ or legibility, or both.
4.2.2 Continuity of marking
The marking is deemed to be continuous if the distance between the end of any marking and
the beginning of the next does not exceed
• 550 mm if the marking is on the outer surface of the cable;
• 275 mm in all other cases.
4.2.3 Core identification
4.2.3.1 General
Cable cores shall be clearly identified by either colours or numbers.
4.2.3.2 Coloured cores
The core colours shall be in accordance compliance with IEC 60445 unless otherwise specified
by the purchaser at the time of ordering.
NOTE Annex A gives details of preferred colour codes.
4.2.3.3 Numbered cores – multicore cables
numbers on each core starting from
Identification should be made by inscription the marking of
the centre beginning with 1 in accordance compliance with Annex B unless otherwise specified
by the purchaser at the time of ordering.
4.2.3.4 Unit identification
When requested by the purchaser, identification of the Individual units of multiunit cables is
permitted by the use of tape(s) marked with numbers.
Individual units of multiunit cables may be identified using numbered or colour tape(s).

5 Constructional requirements
5.1 General description
5.1.1 Overview
Shipboard and offshore cables for fixed installations shall be single or multicore cables
generally constructed as specified in 5.1.2, 5.1.3, 5.1.4 or 5.1.5.
5.1.2 Unarmoured single- or double-sheathed cable
• copper conductor, see 5.2;
• insulation, see 5.3;
• cabling (for multicore cables), see 5.4;
• inner covering (optional, but mandatory only when a braided electrostatic screening is
applied over the core lay-up), see 5.5;
• electrostatic screening (optional), see 5.6;
• inner sheath (optional), see 5.7;
• outer sheath applied as either one- or two-layer systems, see 5.9.
5.1.3 Armoured single-sheathed cable with outer sheath only
• copper conductor, see 5.2;
• insulation, see 5.3;
• cabling (for multicore cables), see 5.4;
• inner covering below electrostatic screening (optional, but mandatory only when a braided
electrostatic screening is applied over the core lay-up), see 5.5;
• electrostatic screening (optional), see 5.6;
• inner covering (optional, but mandatory only in case of a braid armour made of galvanised
steel wires in which. In such case the inner covering shall be extruded), see 5.5;
• braid armour, see 5.8;
• outer sheath applied as either one-or two-layer systems, see 5.9.
5.1.4 Armoured double-sheathed cable with inner and outer sheath only
• copper conductor, see 5.2;
• insulation, see 5.3;
• cabling (for multicore cables), see 5.4;
• inner covering (optional, but mandatory only when a braided electrostatic screening is
applied over the core lay-up), see 5.5;
• electrostatic screening (optional), see 5.6;
• inner sheath, see 5.7;
• braid armour, see 5.8;
• outer sheath applied as either one- or two-layer systems, see 5.9.
5.1.5 Armoured single-sheathed cable with inner sheath only
• copper conductor, see 5.2;
• insulation, see 5.3;
• cabling (for multicore cables), see 5.4;
• inner covering (optional, but mandatory only when a braided electrostatic screening is
applied over the core lay-up), see 5.5;

– 10 – IEC 60092-376:2025 RLV © IEC 2025
• electrostatic screening (optional), see 5.6;
• inner sheath, see 5.7;
• braid armour, see 5.8.
Cables for installation When installed in spaces where subject to corrosion can occur, for
example weather decks, wet locations, battery compartments, refrigeration rooms, the cables
should have an outer sheath over the braid, unless the braid itself is corrosion resistant.
5.2 Conductors
The material, metal coating, separator, class, and form of the conductors shall be in accordance
compliance with IEC 60092-350 and. The conductors shall be circular Class 2 or Class 5
2 2
constructions of with a circular shape and a cross-sectional area of 0,50 mm , 0,75 mm ,
2 2 2
1,0 mm , 1,5 mm or 2,5 mm .
2 2
NOTE In the shipbuilding and offshore industry, The preferred conductor sizes are usually 0,75 mm and 1,5 mm .
Conductor resistance shall be in accordance compliance with Table 1.
Table 1 – Electrical resistance of conductors
Maximum DC resistance for Maximum DC resistance for
Class 2 stranding Class 5 stranding
Nominal cross- of plain copper of tinned copper of plain copper of tinned copper
sectional area conductors conductors conductors conductors
Ω/km at 20 °C Ω /km at 20 °C Ω /km at 20 °C Ω /km at 20 °C
mm
0,50 40,4 41,6 41,4 42,5
0,75 26,0 26,3 27,6 28,3
1,0 19,2 19,3 20,7 21,2
1,5 12,8 12,9 14,1 14,5
2,5 7,86 8,02 8,47 8,71
5.3 Insulation
5.3.1 Material
The insulating compounds and their designations shall be as given in IEC 60092-360, thus
types EPR, HEPR, XLPE, HF 90 or S 95 shall be used.
The insulation system shall consist of one of the options a) to c) as listed in
IEC 60092-350:20142020, 4.3.1.
5.3.2 Application
The application shall be as detailed in IEC 60092-350:20142020, 4.3.2.
5.3.3 Thickness of insulation
The thickness of the insulation shall be as specified in Table 2 of this document and shall meet
the requirements of IEC 60092-350:20142020, 4.3.3.

Table 2 – Insulation thickness
Nominal cross-sectional area of EPR XLPE
conductor
HF 90 HEPR
S 95
mm mm
mm
0,50 0,6 0,4
0,75 0,6 0,5
1,0 0,6 0,5
1,5 0,7 0,6
2,5 0,7 0,6
For cables which include inorganic tape(s) or varnished glass braid to confer fire resistance (limited circuit
integrity), all the values of insulation given in this table shall be increased by 0,20 mm for subsequent consideration
in the calculation of fictitious diameters.
NOTE For the calculation of fictitious diameters, see method outlined in IEC 60092-350:2020, Annex A and
Annex B C.
5.4 Cabling
5.4.1 General
The cores of a multicore cable shall be laid up, and interstices filled, if necessary, with fillers,
inner covering or inner sheath (outer sheath in the case of unarmoured cables) according to in
compliance with IEC 60092-350:20142020, 4.5.
5.4.2 Core assembly
– Cores laid up in concentric layers, unscreened, provided with an optional tape wrapping,
finished to one of the constructions construction options detailed in 5.1.2.
– Cores laid up in concentric layers, with an overall collective screen with drain wire detailed
in 5.6.2, with an optional tape wrapping, finished to one of the constructions construction
options detailed in 5.1.3, 5.1.4 and 5.1.5.
– Cores twisted together to form a pair, triple or quad unit, each unit being individually
screened with drain wire detailed in 5.6.1, then cabled together, provided with an optional
tape wrapping or optional tape screen, and finished to one of the constructions construction
options detailed in 5.1.3, 5.1.4 and 5.1.5.
– Cores twisted to form a pair, triple or quad unit, these unscreened units cabled together with
an overall collective screen with drain wire detailed in 5.6.2, provided with an optional tape
wrapping, finished to one of the constructions construction options detailed in 5.1.3, 5.1.4
and 5.1.5.
NOTE A non-hygroscopic binder tape or tapes can be applied over each layer.
5.4.3 Forming pair, triple, or quad units
If the pair, triple or quad units are not individually screened then the lay length of the cores, in
adjacent units, shall be selected so as to reduce inductive effects and cross-talk to a minimum
and ensure that the cores of the pair, triple or quad units do not become disassociated by
normal handling. The lay length of the cores individually or collectively screened shall not
2 2
exceed 120 mm for sizes below 1,5 mm and 150 mm for sizes 1,5 mm and above.
NOTE A non-hygroscopic binder tape or tapes can be applied over each layer.

– 12 – IEC 60092-376:2025 RLV © IEC 2025
5.4.4 Fillers
Use of fillers is permitted Fillers may be used, as necessary, to give the completed cable a
substantially circular cross-section. When used, they shall be composed of a crosslinked or
non-crosslinked elastomeric compound, a thermoplastic compound or natural or synthetic
textiles. The fillers shall be non-hygroscopic and there shall be no harmful interactions between
the filler constituents and either the insulation or the sheath, or both. Fillers shall be removable
without causing damage to any other component in the cable. Alternatively, interstitial fillers
may be applied integrally with the sheath of unarmoured cables or the inner sheath or inner
covering of metal armoured cables.
5.4.5 Number of cores, pair, triple, or quad units
Within practical physical limits, any number of cores, pairs, triples, or quads can be laid up to
form a cable assembly. However, Annex C gives recommended cable assemblies.
5.5 Inner covering
5.5.1 General
The inner covering, if any, may be extruded (mandatory below galvanized steel wire braid) or
lapped. The relevant material and characteristics shall be in accordance compliance with
IEC 60092-350:20142020, 4.6.
5.5.2 Thickness of inner covering
The values of the (approximate) thickness of extruded inner covering for the calculation of
fictitious diameters are given in Table 3.
Table 3 – Thickness of inner covering
Fictitious diameter over laid-up cores Thickness of inner covering (approximate value)
Above Up to and including Extruded Lapped
mm mm mm mm
- 25 1,0 0,1
25 35 1,2 0,1
35 45 1,4 0,1
45 60 1,6 0,1
60 - 1,8 0,1
NOTE For the calculation of fictitious diameter, see IEC 60092-350:2020, Annex A and Annex C.

5.6 Screen
5.6.1 Individual screen
5.6.1.1 General
The screen, if any, shall be an individually metallic screen of a pair, triple, or quad. It shall be
in accordance compliance with IEC 60092-350:20142020, 4.4.2, and shall consist of one or
more tapes or a braid, or a combination of a braid with tape.

5.6.1.2 Metal-polymer tape
The laminated electrostatic screening tape shall be applied with the metallic side in electrical
contact with a drain wire. The minimum overlap of the laminated tape shall be 25 % of its total
width, to ensure coverage in case of cable bending. The laminated tape shall be either
aluminium bonded to polymeric material having a minimum thickness of aluminium of 0,008 mm
and a minimum thickness of polymer of 0,010 mm, or copper bonded to polymer having a
minimum thickness of copper of 0,018 mm and a minimum thickness of polymer of 0,023 mm.
the drain wire shall be composed of a number of strands of tinned annealed copper wires in the
case of aluminium laminate tape and either plain or tinned annealed copper wires in the case
of copper laminate tape. the drain wire shall have a maximum resistance in accordance with
Table 4.
In case of aluminium laminate tape, the drain wire shall be composed of a number of strands of
tinned annealed copper wires. In case of copper laminate tape, the drain wire shall be composed
of a number of strands of either plain or tinned annealed copper wires. The drain wire maximum
resistance shall be in compliance with Table 4.
5.6.1.3 Braided screen
When an individual braided screened pair, triple or quad construction is required, each pair,
triple or quad shall have a non-hygroscopic separator tape applied over the cores and under
the braid. The nominal overlap shall not be less than 25 %.
The braid shall be made of either plain or metal coated copper wires; the minimum diameter of
the braid wire shall be
• 0,15 mm for fictitious cable diameters under the braid less than or equal to 9 mm;
• 0,2 mm for fictitious cable diameters under the braid greater larger than 9 mm.
Joints in the braiding wires shall be soldered, twisted, or woven in and the complete braid shall
not be welded. The braid shall be evenly applied.
The "filling factor" F of the braid shall not be less than 0,6 when calculated in accordance
compliance with the alternative method given in IEC 60092-350.
NOTE The percentage coverage K is calculated as follows: K = (2F – F2) × 100
The fictitious diameter under the braid is calculated by the method described in
IEC 60092-350:20142020, Annex A.
When required, to aid termination, a drain wire may be applied under and in direct contact with
the braid screen. The drain wire shall be composed of a number of strands of tinned or plain
annealed copper wires. The drain wire shall have a maximum resistance shall be in accordance
compliance with Table 4.
Table 4 – Drain wire requirements
Nominal area of core conductor Maximum drain wire resistance
mm Ω/km
0,50 61,2
0,75 42,5
1,0 28,3
1,5 28,3
2,5 21,2
– 14 – IEC 60092-376:2025 RLV © IEC 2025
Polymer tape with a nominal thickness of either 0,023 mm or 0,050 mm shall be applied over
the screen with a minimum overlap of 20 % of its total width.
5.6.2 Collective electrostatic screen
5.6.2.1 Metal-polymer tape
When collectively screened constructions are required, a laminated electrostatic screening tape
shall be applied with the metallic side in electrical contact with the drain wire. The minimum
overlap of the laminated tape shall be 25 % of its total width.
The laminated tape shall be either aluminium bonded to polymer having a minimum thickness
of aluminium of 0,008 mm and a minimum thickness of polymer of 0,010 mm, or copper bonded
to polymer having a minimum thickness of copper of 0,018 mm and a minimum thickness of
polymer of 0,023 mm.
the drain wire shall be composed of a number of strands of tinned annealed copper wires in the
case of aluminium laminate tape and either plain or tinned annealed copper wires in the case
of copper laminate tape. the drain wire shall have a maximum resistance in accordance with
Table 4.
In case of aluminium laminate tape, the drain wire shall be composed of a number of strands of
tinned annealed copper wires. In case of copper laminate tape, the drain wire shall be composed
of a number of strands of either plain or tinned annealed copper wires. The drain wire maximum
resistance shall be in compliance with Table 4.
Alternatively, a braid screen may be applied.
5.6.2.2 Braided screen
The braid shall be made of either plain or metal coated copper wires; the nominal diameter of
the braid wire shall be
• 0,15 mm for fictitious cable diameters under the braid less than or equal to 9 mm;
• 0,2 mm for fictitious cable diameters under the braid greater larger than 9 mm.
Joints in the braiding wires shall be soldered, twisted, or woven in and the complete braid shall
not be welded. The braid shall be evenly applied.
The "filling factor" F of the braid shall not be less than 0,6 when calculated in accordance
compliance with the alternative method given in IEC 60092-350.
NOTE The percent coverage K = (2F – F ) × 100
The fictitious diameter under the braid is calculated by the method described in
IEC 60092-350:2020, Annex A.
When required to aid termination, a drain wire may be applied under and in direct contact with
the braid screen. The drain wire shall be composed of a number of strands of tinned or plain
annealed copper wires. The drain wire shall have a maximum resistance shall be in accordance
compliance with Table 4.
In the case of metal armour consisting of copper braid metal armour, this may also provide the
function of a collective screen.
A metal armour consisting of copper braids can also fulfil the function of a collective screen.

5.6.2.3 Application
The screen, if any, shall be applied over the inner covering in case of a braided or a metal-
polymer tape screen (see 5.1.3, 5.1.4 and 5.1.5).
5.7 Inner sheath
5.7.1 Material
The inner sheathing compound and its designation shall be one of those given in Tables 5 or 7
of in compliance with IEC 60092-360:2021, Table 5 for cross-linked sheathing compounds or
with IEC 60092-360:2021, Table 7 for thermoplastic sheathing compounds.
5.7.2 Application
The application shall be as detailed in compliance with IEC 60092-350:20142020, 4.7.2.
5.7.3 Thickness of inner sheath
The thickness of the inner sheath is given as a function of the internal diameter of the sheath
under consideration, the fictitious diameter being calculated by the method specified in
IEC 60092-350:20142020, Annex A and Annex C.
The formula is the following:
a) for unarmoured double sheathed cables (see 5.1.2):
t = 0,025 D + 0,6 mm with a minimum thickness of 0,8 mm;
– where D is the fictitious diameter under the inner sheath.
b) for armoured cables (see 5.1.4 and 5.1.5):
t = 0,04 D + 0,8 mm with a minimum thickness of 1,0 mm;
– where D is the fictitious diameter under the inner sheath.
The thickness at any point shall satisfy the prescriptions given in be in compliance with
IEC 60092-350:20142020, 4.7.3.
5.8 Braid armour
5.8.1 General
In this document, only metal braid armours are specified, the braid wires being of copper (plain
or tinned), copper alloy (plain or tinned) or zinc coated (galvanized) steel, or stainless steel.
Joints in the braiding wires shall be soldered, twisted, or woven in and the complete braid shall
not be jointed. The braid shall be evenly applied.
The armour may can serve as a collective metallic screen (see 5.6).
NOTE In some countries, the use of an armour as an earthing collective metallic screen is prohibited for legal
reasons.
5.8.2 Braid wire diameter
Irrespective of the metal used, the nominal diameter of the braid wire shall be
– 0,2 mm, as a minimum, for cables having fictitious diameters under the braid less than or
equal to 10 mm,
– 0,3 mm, as a minimum, for cables having fictitious diameters under the braid larger than
10 mm and less than or equal to 30 mm, and

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– 0,4 mm, as a minimum, for cables having fictitious diameter under the braid larger than
30 mm.
5.8.3 Coverage density
The coverage density of the braid shall be in accordance compliance with
IEC 60092-350:20142020, 4.8.2.
NOTE If the alternative method specified in accordance compliance with
IEC 60092-350:20142020, 4.8.2 is used to evaluate the coverage density, the mean diameter
of the braid to be used is the fictitious diameter under the braid plus two times the nominal
diameter of the braiding wires.
5.8.4 Application of the armour
The armour shall be applied so that it shall neither does not adhere to the inner covering or
inner sheath nor or to the outer sheath.
5.9 Outer sheath
5.9.1 Material
The outer sheathing compound and its designation shall be one of those given in compliance
with IEC 60092-360.
5.9.2 Application
s detailed in compliance with IEC 60092-350:20142020, 4.9.2.
The application shall be a
5.9.3 Thickness of outer sheath
The thickness of outer sheath is given as a function of the internal diameter of the sheath under
consideration, the fictitious diameter being calculated by the method specified in
IEC 60092-350:20142020, Annex A and Annex C.
The formula is the following:
a) for unarmoured or armoured single-sheathed cables (see 5.1.2 and 5.1.3):
t = 0,04 D + 0,8 mm with a minimum thickness of 1,0 mm
where D is the fictitious diameter under the sheath
b) for unarmoured
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