IEC 60092-376:2003

INTERNATIONAL IEC
STANDARD
60092-376
Second edition
2003-05
Electrical installations in ships –
Part 376:
Cables for control and instrumentation
circuits 150/250 V (300 V)
Installations électriques à bord des navires –
Partie 376:
Câbles pour circuits de commande et d'instrumentation
150/250 V (300 V)
Reference number
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INTERNATIONAL IEC
STANDARD
60092-376
Second edition
2003-05
Electrical installations in ships –
Part 376:
Cables for control and instrumentation
circuits 150/250 V (300 V)
Installations électriques à bord des navires –
Partie 376:
Câbles pour circuits de commande et d'instrumentation
150/250 V (300 V)
 IEC 2003  Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch  Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale
S
International Electrotechnical Commission
Международная Электротехническая Комиссия
For price, see current catalogue

– 2 – 60092-376  IEC:2003(E)
CONTENTS
FOREWORD . 4
1 Scope and object . 5
2 Normative references. 5
3 Definitions . 6
4 Rated voltage .7
5 Types of insulating compounds. 7
6 Types of sheathing compounds. 7
7 Markings. 7
7.1 Indication of origin and voltage rating . 7
7.2 Continuity . 8
7.3 Durability . 8
7.4 Legibility. 8
7.5 Core identification. 8
7.6 Unit identification. 9
8 General description. 9
9 Conductors .10
10 Insulation system.10
10.1 Material .10
10.2 Electrical and non-electrical characteristics of the insulation system.10
10.3 Application to the conductor.11
10.4 Thickness of insulation .11
11 Cabling .11
11.1 Core assembly (multicore cables) .11
11.2 Forming pair, triple or quad units .11
11.3 Unit assembly (multiunit cables) .12
11.4 Fillers .12
11.5 Number of cores, pairs, triples or quads. .12
12 Electrostatic screen .12
12.1 Individually taped screened pair, triple or quad constructions .12
12.2 Individually braided screened pair, triple or quad constructions .12
12.3 Collectively screened constructions .13
13 Inner Coverings and binders .14
13.1 General .14
13.2 Thickness of inner covering .14
14 Sheath(s).15
14.1 Thickness of sheath(s).15
14.2 Colour of sheath .16
15 Metal braid armour.16
15.1 Braid wire diameter.16
15.2 Coverage density.16
15.3 Application of the braid armour .16
16 Particular tests.17
16.1 Additional compatibility test .17
16.2 Durability .17

60092-376  IEC:2003(E) – 3 –
17 Tests on completed cables .17
17.1 Routine tests .17
17.2 Special tests.18
17.3 Type tests, non-electrical.18
17.4 Type tests, electrical.18
Annex A (informative) Core identification.19
Annex B (informative) Number of cores and pair, triple or quad units .20
Table 1 – Dimension of the marks . 9
Table 2 – Specified thickness of insulation .11
Table 3 – Requirements of drain wire .13
Table 4 – thickness of inner covering .14
Table 5 –Coefficient cf .15
Table 6 – Electrical resistance of conductors .17
Table A.1 – Typical colour code for single unit cables .19

– 4 – 60092-376  IEC:2003(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICAL INSTALLATIONS IN SHIPS –
Part 376: Cables for control and instrumentation
circuits 150/250 V (300 V)
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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. The 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 the 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 National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60092-376 has been prepared by subcommittee 18A: Cables and
cable installations, of IEC technical committee 18: Electrical installations of ships and of
mobile and fixed offshore units
This second edition of IEC 60092-376 cancels and replaces the first edition published in 1983,
of which it constitutes a technical revision.
The text of this standard is based on the following documents:
FDIS Report on voting
18A/242/FDIS 18A/244/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this publication will remain unchanged until
2008. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
60092-376  IEC:2003(E) – 5 –
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 is applicable to screened and unscreened cables for control and
instrumentation circuits on ships and offshore units. The cables have extruded solid insulation
with a voltage rating of 150/250V (300V) (see Clause 4) and are intended for fixed
installations.
The various types of cables are given in Clause 8. The construction requirements and test
methods are expected to comply with those indicated in IEC 60092-350, unless otherwise
specified in this standard.
NOTE Provision is made for fire resistant (limited circuit integrity) cables to be specified if required.
The object of this part of IEC 60092 is
– to standardise cables whose safety and reliability are ensured when they are installed in
accordance with the requirements of IEC 60092-352;
– to lay down standard manufacturing requirements and characteristics of such cables
directly or indirectly bearing on safety;
– to specify test methods for checking conformity with those requirements.
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
IEC 60228, Conductors of insulated cables
IEC 60092-350:2001, Electrical installations in ships – Part 350: Shipboard power cables –
General construction and test requirements
IEC 60092-351, Electrical installations in ships – Part 351: Insulating materials for shipboard
and mobile and fixed offshore units power, telecommunication, and control data cables
IEC 60092-352, Electrical installation in ships – Part 352: Choice and installation of cables for
low-voltage power systems
IEC 60092-359, Electrical installations in ships – Part 359: Sheathing materials for shipboard
power and telecommunication cables
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 kV
IEC 60332-1, Tests on electric cables under fire conditions – Part 1: Test on a single vertical
insulated wire or cable
– 6 – 60092-376  IEC:2003(E)
IEC 60332-3-22, Tests on electric cables under fire conditions – Part 3-22: Test for vertical
flame spread of vertically-mounted bunched wires or cables – Category A
IEC 60811 (all parts), Common test methods for insulating and sheathing materials of electric
cables
IEC 61034-1, Measurement of smoke density of cables burning under defined conditions –
Part 1: Test apparatus
IEC 61034-2, Measurement of smoke density of cables burning under defined conditions –
Part 2: Test procedure and requirements
IEC 60092-353, Electrical installations in ships – Part 353: Single and multicore non-radial
field power cables with extruded solid insulation for rated voltages 1 kV and 3 kV
3 Definitions
For the purposes of this standard, the definitions given in IEC 60092-350 and the following
apply.
3.1
pair unit
a unit which consists of two cores laid up with or without interstitial fillers or binder tape(s)
3.2
triple unit
a unit which consists of three cores laid up with or without interstitial fillers or binder tape(s)
3.3
quad unit
a unit which consists of four cores laid up with or without interstitial fillers or binder tape(s)
3.4
electrostatic screen
surrounding earthed metallic layer to confine the electrical field within the cable cores, pair(s),
triple(s) or quad(s) and/or to protect the cable core(s), pair(s), triple(s) or quad(s) from
external electrical influence
3.5
drain wire
an uninsulated conductor which has the specific function of earthing an electrostatic tape
screen by ensuring a low resistive path throughout the length of the cable
3.6
single unit cable
a cable consisting of either one pair, triple or quad unit, either unscreened or with an
individual electrostatic screen
3.7
multi-unit cable
a cable consisting of more than one pair, triple or quad units either unscreened or with an
individual electrostatic screen around each unit or having an electrostatic screen applied
around the assembly of units (a collective screen)

60092-376  IEC:2003(E) – 7 –
3.8
braid armour
a covering formed from braided metal wires used to protect the cable from external
mechanical effects
NOTE Copper wire braid armour may also provide the function of an electrostatic collective screen, providing it is
earthed.
3.9
inner covering
a non-metallic covering which surrounds the assembly of the cores (and filler if any) of a
multi-conductor cable and over which the protective covering is applied
4 Rated voltage
The standard rated voltage U /U (U ) is as follows:
o m
U /U (U ) = 150 V/250 V (300 V) a.c.
o m
In the voltage designation of cables
U is the rated power-frequency voltage between the conductor and the earth or metallic
o
covering for which the cable is designed;
U is the rated power-frequency voltage between conductors for which the cable is
designed.
U is the maximum value of the highest system voltage for which the equipment may be
m
used.
A d.c. voltage up to a maximum of 1,5 times the a.c. voltage may be used, provided that the
voltage to earth does not exceed 250 V.
NOTE When circuits are to be supplied from a low impedance source, attention is drawn to IEC 60092-353 for
600/1000 V cables having a minimum conductor size of 1,5 mm .
5 Types of insulating compounds
The insulation compounds and their designations shall be selected fromIEC 60092-351.
6 Types of sheathing compounds
The sheathing compounds and their designations shall be selected from IEC 60092-359.
7 Markings
7.1 Indication of origin and voltage rating
Identification of origin (manufacturer’s name or trade mark), rated voltage (U /U) and cons-
o
truction (number of cores, pairs, triples or quads and cross sectional area of the conductor) to
be printed, embossed or indented on the oversheath. It is allowed, in addition, to include an
identification printed tape.
Multicore example : “Name or Trade mark 150/250 V 19 x 1,5 mm “
Multi-unit example: “Name or Trade mark 150/250 V 3 x 2 x 0,75 mm “
In the case of an outer metal braid armour applied above the oversheath, identification by
threads or printed tapes inserted under the metal braid is permitted.

– 8 – 60092-376  IEC:2003(E)
7.2 Continuity
The marking of the manufacturer's name or trademark 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 indication is on the sheath, and
– 275 mm in all other cases.
7.3 Durability
The printed marking shall be indelible.
Compliance with this requirement is checked by the test described in 16.2.
7.4 Legibility
The marking of the manufacturer's name or trademark shall be legible.
The colours of identification threads, if any, shall be easy to recognise or easily made
recognisable, if necessary, by cleaning.
7.5 Core identification
Identification of cores shall be made within multicore cables or cores within pair, triple or quad
unit(s), according to one of the methods below.
7.5.1 Multicore cables
Identification shall be made by inscription of numbers on each core starting from the centre
beginning with 1 in accordance with the following.
7.5.1.1 Identification
The identification shall be composed of marks at regular intervals along the entire length of
core and comprising of
a) a reference number in Arabic numerals;
b) a dash which underlines this reference number and indicates the direction in which the
number must be read.
7.5.1.2 Arrangement of the marks
Two consecutive marks shall always be placed upside down in relation to one another. The
arrangement of the marks is shown in Figure 1.
i
d i
d
n i
IEC  1639/03
Figure 1 – Arrangement of the marks
e
D
60092-376  IEC:2003(E) – 9 –
When the reference consists of a single numeral, the dash is placed under it; if the reference
number consists of two numerals, these are disposed one below the other and the dash is
placed underneath the lower numeral.
7.5.1.3 Spacing and dimensions of the marks
The dimensions of the marks and the spacing are given in Table 1,
where
D = nominal diameter of the core;
e = minimum width of a mark;
n = minimum height of a numeral;
i = approximate interval, in a mark, between two consecutive numerals, as well as between
numeral and dash;
d = maximum interval between two consecutive marks.
Table 1 – Dimension of the marks
Nominal diameter, D,
a
of the core e ni d
mm
0,6 mm 2,3 mm 2 mm 50 mm
D ≤ 2,4
2,4 < D < 5 1,2 mm 3,2 mm 3 mm 50 mm
a
When the numeral is 1, the minimum width is equal to half the dimension given in this table.
7.5.1.4 Appearance of identification
The identification shall be legible and of a colour which contrasts with that of the core. All the
marks of the cores in multicore cable shall be of the same colour.
7.5.2 Single and multiunit cables
The cores of single and multiunit cables shall be provided with a suitable method of
identification.
7.6 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.
NOTE Annex A gives details of a typical colour code.
8 General description
Screened a
...