Small craft — Electrical systems — Alternating and direct current installations

This document specifies the requirements for the design, construction and installation of the following types of DC and AC electrical systems, installed on small craft either individually or in combination: a) extra-low-voltage direct current (DC) electrical systems that operate at nominal potentials of 50 V DC or less; b) single-phase alternating current (AC) systems that operate at a nominal voltage not exceeding AC 250 V. This document does not cover the following: — electrical propulsion systems of direct current less than 1 500 V DC, single-phase alternating current up to 1 000 V AC, and three-phase alternating current up to 1 000 V AC, which are addressed by ISO 16315; — any conductor that is part of an outboard engine assembly and that does not extend beyond the outboard engine manufacturers supplied cowling; — three-phase AC installations that operate at a nominal voltage not exceeding 500 V AC, which are addressed by IEC 60092-507.

Petits navires — Installations électriques — Installations à courant alternatif et continu

Le présent document spécifie les exigences concernant la conception, la construction et les installations des types suivants d'installations électriques à courants d.c et a.c. réalisées individuellement ou en combinaison sur les petits navires: a) les installations électriques à courant continu à très basse tension (d.c.) qui fonctionnent à des tensions nominales inférieures ou égales à 50 V d.c; b) les installations électriques à courant alternatif (a.c.) monophasé qui fonctionnent à une tension nominale ne dépassant pas 250 V a.c. Le présent document ne couvre pas les éléments suivants: — les installations électriques de propulsion à courant continu inférieur à 1 500 V d.c., à courant alternatif monophasé jusqu'à 1 000 V a.c. et à courant alternatif triphasé jusqu'à 1 000 V a.c. qui sont traités par l'ISO 16315; — tout conducteur qui fait partie d'un ensemble de moteur hors-bord et qui ne s'étend pas au-delà du capot fourni par le fabricant du moteur hors-bord; — les installations électriques triphasées a.c. fonctionnant à une tension nominale ne dépassant pas 500 V c.a. qui sont traitées par l'IEC 60092‑507.

General Information

Status
Published
Publication Date
13-Dec-2020
Technical Committee
Drafting Committee
Current Stage
6060 - International Standard published
Start Date
14-Dec-2020
Completion Date
14-Dec-2020
Ref Project

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INTERNATIONAL ISO
STANDARD 13297
Fifth edition
2020-12
Small craft — Electrical systems
— Alternating and direct current
installations
Petits navires — Installations électriques — Installations à courant
alternatif et continu
Reference number
ISO 13297:2020(E)
ISO 2020
---------------------- Page: 1 ----------------------
ISO 13297:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 13297:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 General requirements, DC and AC systems ............................................................................................................................... 5

5 General requirements, DC systems ................................................................................................................................................... 6

6 General requirements, AC systems .................................................................................................................................................... 7

7 Marking, AC systems ......................................................................................................................................................................................... 8

8 Batteries, DC systems ....................................................................................................................................................................................... 9

9 Battery-disconnect switch, DC systems ......................................................................................................................................11

10 Power source options, AC systems ..................................................................................................................................................11

11 Inverters and inverter/chargers, AC systems ......................................................................................................................12

12 Overcurrent protection, DC systems .............................................................................................................................................13

13 Overcurrent protection, AC systems .............................................................................................................................................14

13.1 General ........................................................................................................................................................................................................14

13.2 Supply circuits ......................................................................................................................................................................................14

13.3 Branch circuits .....................................................................................................................................................................................14

14 Ground-fault protection/earth-leakage protection, AC systems .....................................................................15

15 Panel boards (switchboards), DC and AC systems ..........................................................................................................15

16 Panel boards (switchboards), AC systems ..............................................................................................................................15

17 Conductors, DC and AC systems .........................................................................................................................................................15

18 Conductors, DC systems .............................................................................................................................................................................16

19 Conductors, AC systems ..............................................................................................................................................................................16

20 System wiring, DC and AC systems ..................................................................................................................................................17

21 System wiring, DC systems ......................................................................................................................................................................19

22 Socket outlets, DC systems ......................................................................................................................................................................19

23 Socket outlets, AC systems .......................................................................................................................................................................19

24 Appliances and equipment, AC systems ....................................................................................................................................19

25 Ignition protection, DC and AC systems .....................................................................................................................................19

26 Owner’s manual..................................................................................................................................................................................................20

Annex A (normative) Conductor requirements .....................................................................................................................................21

Annex B (normative) Instructions to be included with owner's manual ....................................................................23

Annex C (informative) Recommended system tests ..........................................................................................................................24

Annex D (informative) Typical AC system diagrams .........................................................................................................................25

Annex E (informative) Overcurrent protection location options.........................................................................................32

Bibliography .............................................................................................................................................................................................................................34

© ISO 2020 – All rights reserved iii
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ISO 13297:2020(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to

the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see

www .iso .org/ iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 188, Small craft, in collaboration with

the European Committee for Standardization (CEN) Technical Committee CEN/TC 464, Small craft, in

accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).

This fifth edition of ISO 13297 cancels and replaces ISO 13297:2014 and ISO 10133:2012, which have

been technically revised.
The main changes compared to the previous editions are as follows:

— combined the standard for alternating current (ISO 13297:2014) and the standard for direct current

(ISO 10133:2012) into a single marine electrical standard.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved
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INTERNATIONAL STANDARD ISO 13297:2020(E)
Small craft — Electrical systems — Alternating and direct
current installations

IMPORTANT — The colours represented in the electronic file of this document can be neither

viewed on screen nor printed as true representations. For the purposes of colour matching,

see ISO 3864-4, which provides colorimetric and photometric properties together with, as a

guideline, references from colour order systems.
1 Scope

This document specifies the requirements for the design, construction and installation of the following

types of DC and AC electrical systems, installed on small craft either individually or in combination:

a) extra-low-voltage direct current (DC) electrical systems that operate at nominal potentials of

50 V DC or less;

b) single-phase alternating current (AC) systems that operate at a nominal voltage not exceeding

AC 250 V.
This document does not cover the following:

— electrical propulsion systems of direct current less than 1 500 V DC, single-phase alternating

current up to 1 000 V AC, and three-phase alternating current up to 1 000 V AC, which are addressed

by ISO 16315;

— any conductor that is part of an outboard engine assembly and that does not extend beyond the

outboard engine manufacturers supplied cowling;

— three-phase AC installations that operate at a nominal voltage not exceeding 500 V AC, which are

addressed by IEC 60092-507.
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.

ISO 7010:2019, Graphical symbols — Safety colours and safety signs — Registered safety signs

ISO 8846:1990, Small craft — Electrical devices — Protection against ignition of surrounding

flammable gases
ISO 10240:2019, Small craft — Owner’s manual

IEC 60309-2:1999, Plugs, socket-outlets and couplers for industrial purposes — Part 2: Dimensional

interchangeability requirements for pin and contact-tube accessories
IEC 60529:1989, Degrees of protection provided by enclosures (IP code)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

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

— ISO Online browsing platform: available at https:// www .iso .org/ obp
© ISO 2020 – All rights reserved 1
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ISO 13297:2020(E)
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
craft’s ground/earth
protective grounding

connection, provided for safety purposes, that is established by a conducting connection with the

common ground/earth (potential of the earth's surface)
3.2
equipotential bonding conductor

normally non-current-carrying conductor used to put various exposed conductive parts (3.15) of direct

current electrical devices and extraneous conductive parts (3.33) at a substantially equal potential

3.3
engine negative terminal

terminal on the engine, starter or solenoid to which the negative battery cable is connected

3.4
main grounding
earthing point

main point that provides connection for the DC negative conductor, AC protective grounding conductor

(3.10) and bonding conductor to the craft's ground that is established by a conducting connection

(intended or accidental) with the common ground (potential of the earth's surface)

Note 1 to entry: It can include any conductive part of the wetted surface of the hull in permanent contact with the

water, depending on the overall system design.
3.5
overcurrent protection device

device designed to interrupt the circuit when the current flow exceeds a predetermined value for a

predetermined time
EXAMPLE A fuse (3.29) or circuit breaker.
3.6
residual current device
RCD

electro-mechanical switching device or association of devices designed to make, carry and break

currents under normal service conditions and to cause the opening of contacts when the residual

current attains a given value under specified conditions

Note 1 to entry: RCDs serve to reduce the risk of injury to people from electrical shock hazard, and damage to

equipment from leakage of stray currents to earth or to other circuits.
3.7
polarization transformer

transformer that automatically orientates the neutral and active (phase) conductors (3.12) in the system

in the same polarity orientation as the polarized system (3.17) of the craft
3.8
isolation transformer

transformer installed in the shore power supply circuit on a craft to electrically isolate all the normally

live conductors (3.11) and the protective conductor (3.10) on the craft from the AC system conductors of

the shore power supply
3.9
neutral conductor

conductor intentionally maintained at ground potential and capable of contributing to the transmission

of electrical energy
2 © ISO 2020 – All rights reserved
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ISO 13297:2020(E)
3.10
protective conductor
protective grounding conductor

conductor, not normally carrying current, used for some measure of protection against electric shock,

for electrically connecting any of the following parts of electrical equipment to the craft's ground/earth

and to the shore AC grounding conductor through the shore power cable:
a) exposed conductive parts (3.15) of electrical equipment;
b) extraneous conductive parts (3.33);
c) the main grounding (earthing) terminal;
d) earth electrode(s);
e) the earth point of a source, or an artificial neutral
3.11
live conductor

conductor or conductive part intended to be energized in normal use, including a neutral conductor (3.9)

3.12
active (phase) conductor

conductor that is maintained at a difference of potential from the neutral conductor (3.9) or protective

conductor (3.10)

Note 1 to entry: In a system that does not include a neutral or protective conductor, all conductors are considered

active conductors.
3.13
ignition-protected

designed and constructed to give protection against ignition of surrounding

flammable gases

Note 1 to entry: The protection against ignition of surrounding flammable gases is covered in ISO 8846:1990.

3.14
system voltage
nominal voltage supplied to the craft from a power source
3.15
exposed conductive part

conductive part of electrical equipment, which can be touched and which is not normally live, but which

can become live under fault conditions
3.16
panel board
switchboard

assembly of devices for the purpose of controlling and/or distributing electrical power

Note 1 to entry: It can include devices such as circuit breakers, fuses (3.29), switches, instruments, and indicators.

3.17
polarized system

system in which the live conductors (3.11) (active and neutral) are connected in the same relation to all

terminals on devices or receptacles (socket outlets) in a circuit
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ISO 13297:2020(E)
3.18
fully insulated two-wire DC system

system in which both positive and negative poles remain isolated from the ground (earth), e.g. not

connected to the water through a metallic hull, the propulsion system or earthed through the AC

protective conductor (3.10)

Note 1 to entry: Some systems can use a momentary ground connection for engine starting purposes and can

remain isolated.
3.19
self-limiting

device whose maximum output is restricted to a specified value by its magnetic or electrical

characteristics
3.20
two-wire DC system with negative ground
system in which the DC negative is connected to the ground
3.21
shore power appliance inlet

fitting designed for mounting on a craft, of a shrouded male type, to connect to the female connector

on the craft end of the shore power cable in order to make the electrical connection for transmission of

electrical energy
3.22
trip-free circuit breaker

mechanical switching device capable of making, carrying and breaking currents under normal circuit

conditions and also making, carrying for a specified time and breaking currents under specified

abnormal circuit conditions such as those of overload or short circuit, and which is designed so that the

resetting means cannot be manually held in place to override the current-interrupting mechanism

3.23
accessible

capable of being reached for inspection, removal or maintenance without removal of permanent craft

structure
3.24
readily accessible

capable of being reached for use, inspection, removal or maintenance without the use of tools

3.25
sheath

uniform and continuous tubular protective covering of metallic or non-metallic material around one or

more insulated conductors

Note 1 to entry: Examples of appropriate materials include moulded rubber, moulded plastic, woven sleeving or

flexible tubing.
3.26
conduit

part of a closed wiring system of circular or non-circular cross-section for insulated conductors and/or

cables in electrical installations, allowing them to be drawn in and/or replaced
3.27
cable trunking

system of closed enclosures comprising a base with a removable cover intended for the complete

surrounding of insulated conductors, cables, cords and for the accommodation of other electrical

equipment
4 © ISO 2020 – All rights reserved
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ISO 13297:2020(E)
3.28
double-pole circuit breaker

device intended to interrupt both the neutral conductor (3.9) and active (phase) conductors (3.12) in a

circuit simultaneously when a designated current is exceeded for a predetermined time

3.29
fuse

protective device that interrupts the circuit irreversibly when the current flow reaches a specified

value for a specific time
[SOURCE: ISO 8820-1:2014, 3.2, modified – Note 1 to entry has been deleted.]
3.30
galvanic isolator

device which can be installed in series with the AC protective conductor (3.10) of the shore power cable

to block low voltage DC galvanic current flow, but permits the passage of AC normally associated with

the protective conductor
3.31
inverter

device powered by a DC source, designed primarily to provide AC power at a required voltage and

frequency
3.32
inverter/charger

device designed to supply either AC power to a craft’s electrical system or to utilize the craft’s AC

electrical distribution system to charge or maintain a battery or batteries supplying DC

3.33
extraneous conductive part

conductive part liable to introduce a potential, generally ground/earth potential, and not forming part

of the electrical installation
3.34
ground plate

means to conduct the electrical current from a craft's conductive element to the water

3.35
craft
small craft

recreational boat, and other watercraft using similar equipment, of up to 24 m length of hull (L )

Note 1 to entry: The measurement methodology for the length of hull is defined in ISO 8666.

[SOURCE: ISO 8666:2020, 3.15, modified – Note 1 to entry has been added.]
4 General requirements, DC and AC systems
4.1 The hull of a metallic hull craft shall not be used as a circuit conductor.

4.2 Craft equipped with both DC and AC electrical systems shall have their distribution from either

separate panel boards, or from a common one with a partition, or from other positive means to separate

clearly the AC and DC sections from each other, and these shall be clearly identified.

4.3 Wiring diagrams to identify circuits, components and conductors shall be included with the craft.

After completing an AC installation, it is recommended to perform a system test according to Annex C.

© ISO 2020 – All rights reserved 5
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ISO 13297:2020(E)

4.4 Switches and controls shall be marked to indicate their function, unless the purpose of the switch

is obvious and its operation cannot, under normal operating conditions, cause a hazardous condition.

5 General requirements, DC systems

5.1 The system type shall be either a fully insulated two-wire DC system or a two-wire DC system with

negative ground. Engine-mounted wiring systems can use the engine block as the grounded conductor.

For DC systems with a negative ground, the main grounding/earthing point shall be either:

a) the engine negative terminal; or
b) a main grounding bus of sufficient current carrying capacity.

Systems with multiple battery banks shall have a common negative connection. Exceptions to this

are for dedicated power systems isolated from craft systems, e.g. propulsion systems that are clearly

identified as part of the isolated system.

5.2 An equipotential bonding conductor, if fitted, shall be connected to the craft's main grounding/

earthing point.

5.3 Protective devices such as trip free circuit breakers or fuses shall be provided at the source of

power, e.g. the panel board (switchboard), to interrupt any overload current in the circuit conductors

before heat can damage conductor insulation, connections or wiring system terminals.

5.3.1 The selection, arrangement and performance characteristics shall allow:

a) maximum continuity of service to healthy circuits when fault conditions exist in other circuits,

through selective operation of the various protective devices; and

b) protection of electrical equipment and circuits from damage due to overcurrents, by coordination

of the electrical characteristics of the circuit or apparatus and the tripping characteristics of the

protective devices.

5.4 All DC equipment shall be capable of function within a voltage range of 75 % to 133 % of nominal

voltage at the battery terminals, e.g.:
— for a 12 V system: 9 V to 16 V;
— for a 24 V system: 18 V to 32 V;
— for a 48 V system: 36 V to 64 V.

EXCEPTION Where the circuit includes equipment requiring a higher minimum voltage, the specified

minimum voltage shall be used in the calculation of the conductor size in accordance with Annex A.

5.5 The length and cross sectional area of conductors in each circuit shall be such that the calculated

voltage drop shall not exceed 10 % of the nominal voltage.

5.6 Equipment vital to safety, where the voltage drop is critical, shall be supplied with the proper

voltage to achieve the rated performance.
NOTE 1 See Annex A for voltage drop calculations.
NOTE 2 A 3 % voltage drop is acceptable for this equipment.

NOTE 3 Examples of circuits that can be dependent on a minimum voltage drop include:

a) panel board/switchboard main conductors;
6 © ISO 2020 – All rights reserved
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ISO 13297:2020(E)
b) navigation lights;
c) bilge blowers;
d) bilge pumps.
6 General requirements, AC systems

6.1 The protective conductor insulation shall be green or green with a yellow stripe. Neither colour

shall be used for current-carrying conductors.

NOTE The equipotential bonding conductor of the DC electrical system also uses green or green with a

yellow stripe insulation and is connected to various exposed conductive parts of DC electrical devices, other

extraneous conductive parts and the DC negative ground/earth.

6.2 For craft having a fully insulated DC system, the AC protective conductor shall be connected to:

a) for metallic hulled craft, the hull;
b) for non-conductive hulls, the craft's external ground/earth or ground plate.

6.3 The AC protective conductor(s) shall be provided with a final (single) connection to the hull of a

metallic hull craft, or, if the craft has a non-metallic hull, to the main grounding/earthing point of the craft.

6.4 On metallic hulls, the point of connection of the protective conductor shall be located above any

anticipated water accumulation.

6.5 Metallic housings or enclosures of permanently installed AC electrical appliances shall be

connected to the protective conductor system in the craft.

6.6 Individual circuits shall not be capable of being energized by more than one source of electrical

power at a time. Each shore power inlet, generator or inverter is a separate source of electrical power.

The transfer from one power source circuit to another shall be made by a means which opens all current-

carrying conductors, active (phase) and neutral, before closing the alternate source circuit, to prevent

arc-over between contacts, and should be interlocked by mechanical or electromechanical means. A

device that simultaneously breaks both current carrying conductors, active (phase) and neutral, shall be

used when changing power sources.

The requirements for overcurrent protection are found in Clause 13. A combination of power sources

can be used provided that:
a) the device is constructed and tested to an applicable recognized standard;

b) the device includes protection to prevent backfeeding to shore power (anti-islanding protection);

c) the device includes personnel protection against backfeeding;
d) the installation is performed according to the manufacturer’s instructions.

6.7 Energized parts of electrical equipment shall be guarded against accidental contact by the use of

enclosures conforming to at least IEC 60529:1989-IP 2X or other protective means which shall not be

used for non-electrical equipment. Access to energized parts of the electrical system shall require the use

of hand tools or be at least IP 2X, unless otherwise specified. A suitable warning sign shall be displayed

(see 7.2).

6.8 The neutral conductor shall be grounded (earthed) only at the source of power, i.e. at the onboard

generator, the secondary windings of the isolation or polarization transformer, the shore power

© ISO 2020 – All rights reserved 7
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ISO 13297:2020(E)

connection or inverter. The shore power neutral shall be grounded (earthed) through the shore power

cable and shall not be grounded (earthed) on board the craft or:

a) for systems using an isolation transformer or polarization transformer, both the generator

or inverter neutral and the transformer secondary neutrals may be grounded at the AC main

grounding bus instead of at the generator, inverter, or transformer secondaries;

b) for systems using an isolation transformer or polarization transformer, or no shore power

provision, both the generator or inverter neutral and the transformer secondary neutrals may be

ungrounded provided double-pole protection and switching is installed.

6.9 When a galvanic isolator is fitted in the protective conductor, failure of the isolator shall not result

in an open circuit.

6.10 If the polarity of the system must be maintained for the proper operation of the electrical devices

in the system, reverse polarity indicating devices providing a continuous visible or audible signal shall be

installed in shore power systems and shall respond to the reversal of the active (phase) and the neutral

conductors. Otherwise, a branch circuit shall be provided with overcurrent protection in only the active

(phase) conductor.
Reverse polarity indicating devices are
...

NORME ISO
INTERNATIONALE 13297
Cinquième édition
2020-12
Petits navires — Installations
électriques — Installations à courant
alternatif et continu
Small craft — Electrical systems — Alternating and direct current
installations
Numéro de référence
ISO 13297:2020(F)
ISO 2020
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ISO 13297:2020(F)
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2020

Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, aucune partie de cette

publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique,

y compris la photocopie, ou la diffusion sur l’internet ou sur un intranet, sans autorisation écrite préalable. Une autorisation peut

être demandée à l’ISO à l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.

ISO copyright office
Case postale 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Genève
Tél.: +41 22 749 01 11
E-mail: copyright@iso.org
Web: www.iso.org
Publié en Suisse
ii © ISO 2020 – Tous droits réservés
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ISO 13297:2020(F)
Sommaire Page

Avant-propos ..............................................................................................................................................................................................................................iv

1 Domaine d’application ................................................................................................................................................................................... 1

2 Références normatives ................................................................................................................................................................................... 1

3 Termes et définitions ....................................................................................................................................................................................... 2

4 Exigences générales pour les circuits, d.c. et a.c .................................................................................................................. 6

5 Exigences générales pour les circuits d.c .................................................................................................................................... 6

6 Exigences générales pour les circuits a.c .................................................................................................................................... 7

7 Marquage, circuits a.c ...................................................................................................................................................................................... 9

8 Batteries d’accumulateurs, circuits d.c ......................................................................................................................................10

9 Interrupteur-sectionneur «oupe-batterie», circuits d.c ...........................................................................................11

10 Choix des sources d’alimentation, circuits a.c ....................................................................................................................12

11 Convertisseurs et convertisseurs/chargeurs, circuits a.c .......................................................................................12

12 Protection contre les surintensités, circuits d.c ................................................................................................................14

13 Protection contre les surintensités, circuits a.c ................................................................................................................14

13.1 Exigences générales .........................................................................................................................................................................14

13.2 Circuits d’alimentation ..................................................................................................................................................................15

13.3 Circuits divisionnaires ...................................................................................................................................................................15

14 Protection contre les défauts d’isolement/fuites à la terre, circuits a.c ..................................................15

15 Tableaux de distribution (tableaux électriques) circuits d.c. et a.c .............................................................16

16 Tableaux de distribution (tableaux électriques) circuits a.c ..............................................................................16

17 Conducteurs, circuits a.c. et d.c ...........................................................................................................................................................16

18 Conducteurs, circuits d.c ...........................................................................................................................................................................17

19 Conducteurs, circuits a.c ............................................................................................................................................................................17

20 Systèmes de câblage, circuits d.c. et a.c ......................................................................................................................................18

21 Systèmes de câblage, circuits d.c .......................................................................................................................................................20

22 Socles de prises de courant, circuits d.c ....................................................................................................................................20

23 Socles de prises de courant, circuits a.c ....................................................................................................................................20

24 Appareils et équipements, circuits a.c ........................................................................................................................................21

25 Protection contre les risques d’inflammation, circuits d.c. et a.c ...................................................................21

26 Manuel du propriétaire ..............................................................................................................................................................................21

Annexe A (normative) Exigences relatives aux conducteurs ...................................................................................................22

Annexe B (normative) Instructions à inclure dans le manuel du propriétaire.....................................................24

Annexe C (informative) Essais du circuit recommandés ..............................................................................................................25

Annexe D (informative) Schémas a.c. typiques .......................................................................................................................................26

Annexe E (informative) Options de positionnement des dispositifs de protection contre les

surintensités ..........................................................................................................................................................................................................33

Bibliographie ...........................................................................................................................................................................................................................35

© ISO 2020 – Tous droits réservés iii
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ISO 13297:2020(F)
Avant-propos

L’ISO (Organisation internationale de normalisation) est une fédération mondiale d’organismes

nationaux de normalisation (comités membres de l’ISO). L’élaboration des Normes internationales est

en général confiée aux comités techniques de l’ISO. Chaque comité membre intéressé par une étude

a le droit de faire partie du comité technique créé à cet effet. Les organisations internationales,

gouvernementales et non gouvernementales, en liaison avec l’ISO participent également aux travaux.

L’ISO collabore étroitement avec la Commission électrotechnique internationale (IEC) en ce qui

concerne la normalisation électrotechnique.

Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont

décrites dans les Directives ISO/IEC, Partie 1. Il convient, en particulier de prendre note des différents

critères d’approbation requis pour les différents types de documents ISO. Le présent document a été

rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2 (voir www

.iso .org/ directives).

L’attention est attirée sur le fait que certains des éléments du présent document peuvent faire l’objet de

droits de propriété intellectuelle ou de droits analogues. L’ISO ne saurait être tenue pour responsable

de ne pas avoir identifié de tels droits de propriété et averti de leur existence. Les détails concernant

les références aux droits de propriété intellectuelle ou autres droits analogues identifiés lors de

l’élaboration du document sont indiqués dans l’Introduction et/ou dans la liste des déclarations de

brevets reçues par l’ISO (voir www .iso .org/ brevets).

Les appellations commerciales éventuellement mentionnées dans le présent document sont données

pour information, par souci de commodité, à l’intention des utilisateurs et ne sauraient constituer un

engagement.

Pour une explication de la nature volontaire des normes, la signification des termes et expressions

spécifiques de l’ISO liés à l’évaluation de la conformité, ou pour toute information au sujet de l’adhésion

de l’ISO aux principes de l’Organisation mondiale du commerce (OMC) concernant les obstacles

techniques au commerce (OTC), voir le lien suivant: www .iso .org/ iso/ fr/ avant -propos .html.

Le présent document a été élaboré par le comité technique ISO/TC 188, Petits navires, en collaboration

avec le comité technique CEN/TC 464, Petits navires, du Comité européen de normalisation (CEN)

conformément à l’Accord de coopération technique entre l’ISO et le CEN (Accord de Vienne).

La présente cinquième édition de l’ISO 13297 annule et remplace l’ISO 13297:2014 et l’ISO 10133:2012

qui a fait l’objet d’une révision technique.

Les principales modifications par rapport à l’édition précédente sont les suivantes:

— combinaison de la norme pour le courant alternatif (ISO 13297:2014) et de la norme pour le courant

continu (ISO 10133:2012) en une seule norme électrique pour usage marin.

Il convient que l’utilisateur adresse tout retour d’information ou toute question concernant le présent

document à l’organisme national de normalisation de son pays. Une liste exhaustive desdits organismes

se trouve à l’adresse www .iso .org/ members .html.
iv © ISO 2020 – Tous droits réservés
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NORME INTERNATIONALE ISO 13297:2020(F)
Petits navires — Installations électriques — Installations à
courant alternatif et continu

IMPORTANT — Les couleurs représentées dans le fichier électronique du présent document ne

peuvent être vues à l’écran ni imprimées comme des représentations réelles. Pour les besoins

de la correspondance des couleurs, voir l’ISO 3864-4, qui fournit des propriétés colorimétriques

et photométriques ainsi que, à titre indicatif, des références à partir de systèmes d’ordre des

couleurs.
1 Domaine d’application

Le présent document spécifie les exigences concernant la conception, la construction et les installations

des types suivants d’installations électriques à courants d.c et a.c. réalisées individuellement ou en

combinaison sur les petits navires:

a) les installations électriques à courant continu à très basse tension (d.c.) qui fonctionnent à des

tensions nominales inférieures ou égales à 50 V d.c;

b) les installations électriques à courant alternatif (a.c.) monophasé qui fonctionnent à une tension

nominale ne dépassant pas 250 V a.c.
Le présent document ne couvre pas les éléments suivants:

— les installations électriques de propulsion à courant continu inférieur à 1 500 V d.c., à courant

alternatif monophasé jusqu’à 1 000 V a.c. et à courant alternatif triphasé jusqu’à 1 000 V a.c. qui

sont traités par l'ISO 16315;

— tout conducteur qui fait partie d’un ensemble de moteur hors-bord et qui ne s’étend pas au-delà du

capot fourni par le fabricant du moteur hors-bord;

— les installations électriques triphasées a.c. fonctionnant à une tension nominale ne dépassant pas

500 V c.a. qui sont traitées par l’IEC 60092-507.
2 Références normatives

Les documents suivants sont cités dans le texte de sorte qu’ils constituent, pour tout ou partie de leur

contenu, des exigences du présent document. Pour les références datées, seule l’édition citée s’applique.

Pour les références non datées, la dernière édition du document de référence s'applique (y compris les

éventuels amendements)

ISO 7010:2019, Symboles graphiques — Couleurs de sécurité et signaux de sécurité — Signaux de sécurité

enregistrés

ISO 8846:1990, Navires de plaisance — Équipements électriques — Protection contre l'inflammation des

gaz inflammables environnants
ISO 10240:2019, Petits navires — Manuel du propriétaire

IEC 60309-2:1999, Prises de courant pour usages industriels — Partie 2: Règles d’interchangeabilité

dimensionnelle pour les appareils à broches et alvéoles
IEC 60529:1989, Degrés de protection procurés par les enveloppes (Code IP)
© ISO 2020 – Tous droits réservés 1
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ISO 13297:2020(F)
3 Termes et définitions

Pour les besoins de ce document, les termes et définitions suivants s’appliquent.

L’ISO et l’IEC gèrent des bases de données terminologiques à utiliser pour la normalisation aux adresses

suivantes:

— ISO Online browsing platform: disponible à l’adresse https:// www .iso .org/ obp;

— IEC Electropedia: disponible à l’adresse http:// www .electropedia .org/ .
3.1
masse/terre du bateau
masse de protection

connexion apportée dans un but de sécurité et établie par une connexion électrique reliée à la masse/

terre commune (potentiel de la surface de la terre)
3.2
conducteur de liaison équipotentielle

liaison électrique normalement non active mettant plusieurs masses (3.15) d’une installation à courant

continu et des parties conductrices étrangères (3.33) à un même potentiel ou des potentiels voisins

3.3
borne négative du moteur

borne du moteur, démarreur ou solénoïde sur laquelle le câble négatif de la batterie est connecté

3.4
borne principale de masse/terre
barre principale de masse/terre

borne ou barre principale assurant une connexion pour le conducteur négatif de l’installation d.c., pour

le conducteur de protection a.c. (3.10) et pour le conducteur de liaison à la masse du bateau, établie par

une connexion conductrice (prévue ou accidentelle) avec la masse commune (potentiel de la surface de

la terre)

Note 1 à l'article: Cela peut comprendre toute partie conductrice de la surface mouillée de la coque en contact

permanent avec l’eau, en fonction de la conception générale du système.
3.5
dispositif de protection contre les surintensités

dispositif conçu pour interrompre le circuit lorsque le courant est supérieur à une valeur prédéterminée

pendant une durée prédéterminée
EXEMPLE Un fusible (3.29) ou un disjoncteur.
3.6
dispositif différentiel résiduel
DDR

dispositif électromécanique de coupure ou ensemble de dispositifs conçus pour établir, supporter et

interrompre des courants dans les conditions de service normales et à provoquer l’ouverture des

contacts quand le courant différentiel résiduel atteint, dans des conditions spécifiées, une valeur donnée

Note 1 à l'article: Le DDR est destiné à réduire les risques de blessure des personnes par choc électrique, et

l’endommagement des équipements par des courants de fuite vers la terre ou d’autres circuits.

3.7
transformateur de polarisation

transformateur qui oriente automatiquement le conducteur neutre et les conducteurs actifs (phase)

(3.12) du réseau dans le même sens de polarité que celui du réseau électrique polarisé (3.17) du bateau

2 © ISO 2020 – Tous droits réservés
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ISO 13297:2020(F)
3.8
transformateur d’isolement

transformateur installé sur le circuit d’alimentation depuis le quai d’un bateau et destiné à isoler

électriquement les conducteurs normalement actifs (3.11) et le conducteur de protection (3.10) du bateau

du réseau d’alimentation a.c. depuis le quai
3.9
conducteur neutre

conducteur maintenu intentionnellement au potentiel de la masse et pouvant contribuer au transport

de l’énergie électrique
3.10
conducteur de protection
conducteur de mise à la masse

conducteur ne transportant normalement pas de courant et utilisé dans certaines mesures de

protection contre les chocs électriques et destiné à relier électriquement les parties suivantes des

appareils électriques à la masse/terre du bateau et au conducteur a.c. de mise à la masse via la ligne

d’alimentation du quai:
a) les parties conductrices exposées (3.15) d’appareils électriques (masses);
b) les parties conductrices étrangères (3.33);
c) la borne principale de mise à la masse (terre);
d) les électrode(s) de terre;
e) la borne de mise à la terre d’une source, ou un neutre artificiel
3.11
conducteur actif

conducteur affecté à la transmission de l’énergie électrique, y compris un conducteur neutre (3.9)

3.12
conducteur actif (de phase)

conducteur maintenu à une différence de potentiel avec le conducteur neutre (3.9) ou le conducteur de

protection (3.10)

Note 1 à l'article: Dans un circuit qui n’a pas de conducteur neutre ou de conducteur de protection, tous les

conducteurs sont considérés comme actifs.
3.13
protégé contre l’inflammation

conçu et fabriqué pour fournir une protection contre l’inflammation des gaz

inflammables environnants

Note 1 à l'article: La protection contre l’inflammation des gaz inflammables environnants est couverte par

l’ISO 8846:1990.
3.14
tension de l’installation
tension nominale fournie au bateau depuis une source d’énergie électrique
3.15
partie conductrice exposée

partie conductrice d’un appareil électrique, susceptible d’être touchée, et qui n’est pas normalement

sous tension, mais peut le devenir lorsque l’isolation principale est défaillante

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ISO 13297:2020(F)
3.16
tableau de distribution
tableau électrique

ensemble de dispositifs destinés à réguler et/ou à distribuer l’énergie électrique

Note 1 à l'article: Cela peut comprendre des dispositifs tels que des disjoncteurs, des fusibles (3.29), commutateurs,

instruments et indicateurs.
3.17
circuit polarisé

circuit dans lequel les conducteurs actifs (3.11) (phase et neutre) sont reliés dans la même relation avec

toutes les bornes sur les appareils ou les récepteurs (socles de connexion) d’un circuit

3.18
schéma de distribution d.c. bipolaire totalement isolé

schéma dans lequel les deux pôles, positif et négatif sont isolés de la masse (terre), c’est-à-dire non

connectés à l’eau par l’intermédiaire d’une coque métallique, du système de propulsion ni reliés à la

terre par le conducteur de protection a.c. (3.10)

Note 1 à l'article: Certains schémas peuvent utiliser une liaison à la masse momentanée pour le démarrage du

moteur et peuvent rester isolés.
3.19
autolimitant

dispositif dont la puissance maximale est limitée à une valeur spécifiée par ses caractéristiques

magnétiques ou électriques
3.20
schéma de distribution d.c. bipolaire à masse négative
schéma dans lequel le pôle négatif du schéma d.c. est connecté à la masse
3.21
socle de connecteur pour l’alimentation de quai

socle de connecteur conçu pour être monté sur un bateau, de type mâle étanche avec capuchon

protecteur, pour le raccordement de la prise mobile (femelle) située, à l’extrémité du câble d’alimentation

depuis le quai et destiné à établir le raccordement pour la transmission de l’énergie électrique

3.22
disjoncteur à déclenchement libre

appareil mécanique de connexion capable d’établir, de supporter et d’interrompre le courant dans

des conditions normales du circuit, ainsi que d’établir, de supporter pendant une durée spécifiée et

d’interrompre le courant dans des conditions anormales de circuit spécifiées comme celles d’une

surcharge ou d’un court-circuit, et conçu de manière à ne pas pouvoir être remis en marche en

outrepassant le mécanisme d’interruption du courant
3.23
accessible

que l’on peut atteindre pour l’inspection, le démontage ou la maintenance sans avoir à démonter un

élément permanent de la structure du bateau
3.24
facilement accessible

que l’on peut atteindre rapidement et en toute sécurité, sans l’utilisation d’outils

3.25
gaine

revêtement de protection continu, uniforme, de forme tubulaire, en matériau métallique ou non

métallique, enveloppant un ou plusieurs conducteurs isolés

Note 1 à l'article: Des exemples de matériaux appropriés comprennent le caoutchouc moulé, le plastique moulé,

une gaine tissée ou un tube flexible.
4 © ISO 2020 – Tous droits réservés
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ISO 13297:2020(F)
3.26
conduit

élément d’un système de canalisation fermé de section droite circulaire ou non, destiné à la mise en

place et/ou au remplacement, par tirage, de conducteurs et/ou de câbles isolés dans les installations

électriques
3.27
goulotte

ensemble d’enveloppes fermées, munie d’un fond avec un couvercle amovible et destiné à la protection

complète de conducteurs, câbles ou cordons isolés, ainsi qu’au logement d’autres appareils électriques

3.28
disjoncteur bipolaire

dispositif destiné à interrompre simultanément le conducteur neutre (3.9) et le conducteur actif (de phase)

(3.12) dans un circuit, en cas de dépassement du courant assigné pendant une période prédéterminée

3.29
fusible

dispositif de protection qui interrompt le circuit de manière irréversible lorsque le courant atteint une

valeur spécifique pendant un temps spécifique

[SOURCE: ISO 8820‑1:2014, 3.2, modifiée – La Note 1 à l’article a été supprimée.]

3.30
isolateur galvanique

dispositif pouvant être monté en série avec le conducteur de protection a.c. (3.10) du câble de la ligne

d’alimentation de quai afin de bloquer le courant galvanique d.c. à basse tension, mais permettant le

passage du courant a.c. normalement associé au conducteur de protection
3.31
convertisseur

dispositif alimenté par une source d.c. principalement conçu pour fournir un courant a.c. sous une

tension et une fréquence requise
3.32
convertisseur/chargeur

dispositif conçu soit pour un courant a.c. au circuit électrique du bateau ou pour utiliser le circuit

a.c. de distribution électrique du bateau afin de charger ou entretenir une ou plusieurs batteries

d’accumulateurs fournissant du courant d.c
3.33
partie conductrice étrangère

partie conductrice pouvant introduire une tension, généralement celle de la masse/terre, et ne faisant

pas partie de l’installation électrique
3.34
plaque de masse

dispositif destiné à conduire le courant électrique depuis un élément conducteur du bateau jusqu’à à l’eau

3.35
bateau
petit navire

bateau de plaisance, et autre bateau utilisant un équipement similaire, et d'une longueur de coque (L )

inférieure ou égale à 24 m

Note 1 à l'article: La méthodologie de mesurage de la longueur de coque est définie dans l'ISO 8666.

[SOURCE: ISO 8666:2020, 3.15, modifié – La Note 1 à l'article a été ajoutée.]
© ISO 2020 – Tous droits réservés 5
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ISO 13297:2020(F)
4 Exigences générales pour les circuits, d.c. et a.c

4.1 La coque d’un bateau métallique ne doit pas être utilisée comme un conducteur du circuit.

4.2 Les bateaux équipés à la fois de circuits d.c. et a.c. doivent avoir des circuits de distribution

comportant des tableaux électriques séparés, ou un tableau électrique commun avec un cloisonnement

ou tout autre moyen positif permettant de séparer clairement les circuits a.c. et d.c. l’un de l’autre,

lesquels doivent être clairement identifiés.

4.3 Des schémas électriques permettant d’identifier les circuits, les composants et les conducteurs

doivent être fournis avec le bateau.

Après avoir finalisé une installation a.c., il est recommandé d’effectuer un essai du circuit conformément

à l’Annexe C.

4.4 Les commutateurs et commandes doivent porter un marquage indiquant leur usage, sauf si le but

du commutateur est évident et si son utilisation ne peut pas, en conditions normales, créer une condition

dangereuse.
5 Exigences générales pour les circuits d.c

5.1 Le schéma de distribution doit être soit un schéma d.c. bipolaire totalement isolé, soit un schéma

d.c. bipolaire à masse négative. Les parties de câblage fixés sur le moteur peuvent utiliser le bloc moteur

comme conducteur de mise à la masse.

Pour les schémas d.c. avec masse négative, la borne principale de mise à la masse/terre doit être:

a) la borne négative du moteur; ou
b) une barre principale de mise à la masse d’un courant admissible suffisant.

Les schémas ayant des bancs de batteries multiples doivent avoir une borne négative commune. Les

exceptions à cette exigence sont les circuits électriques dédiés isolés du circuit du bateau, par exemple

les systèmes de propulsion électriques clairement identifiés comme faisant partie du circuit isolé.

5.2 Un conducteur de liaison équipotentielle, si installé, doit être raccordé à la borne principale de

masse/terre du bateau.

5.3 Des dispositifs de protection, comme des disjoncteurs à déclenchement libre ou des fusibles,

doivent être installés à la source d’électricité, par exemple au niveau du tableau de distribution (tableau

électrique), afin d’interrompre toutes les surintensités dans les conducteurs du circuit avant que la

chaleur n’endommage l’isolant des conducteurs, les raccordements ou les bornes du circuit de câblage.

5.3.1 La sélection, la disposition et les caractéristiques de performance des équipements électriques

doivent garantir:

a) une continuité maximale du service des circuits vitaux en cas de défaut de fonctionnement dans les

autres circuits par l’utilisation sélective des divers dispositifs de protection; et

b) la protection des équipements électriques et des circuits contre les dommages dus aux surintensités

par coordination des caractéristiques électriques du circuit ou du dispositif et des caractéristiques

de disjonction des dispositifs de protection.
6 © ISO 2020 – Tous droits réservés
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ISO 13297:2020(F)

5.4 Tous les équipements d.c. doivent pouvoir fonctionner dans les plages de tension aux bornes de la

batterie allant de 75 % à 133 % de la tension nominale aux bornes de la batterie, par exemple:

— pour un schéma 12 V: de 9 V à 16 V;
— pour un schéma 24 V: de 18 V à 32 V;
— pour un schéma 48 V: de 36 V à 64 V.

EXCEPTION Lorsque le circuit comporte des équipements nécessitant une tension minimale plus élevée,

la tension minimale donnée doit être utilisée pour le calcul de la section des conducteurs conformément

à l’Annexe A.

5.5 La longueur et la section des conducteurs de chaque circuit doivent être telles que la chute de

tension calculée ne dépasse pas 10 % de la tension nominale.

5.6 Les appareils essentiels à la sécurité pour lesquels la chute de tension est critique, doivent être

alimentés sous la tension appropriée pour atteindre la performance assignée.
NOTE 1 Voir l’Annexe A pour le calcul de la chute de tension.
NOTE 2 Une chute de tension de 3 % est acceptable pour ce type d’installation.

NOTE 3 Des exemples d’installations qui peuvent dépendre d’une chute de tension minimale comprennent:

a) les conducteurs principaux du tableau de distribution/tableau électrique;
b) les feux de navigation;
c) les ventilateurs de cale; et
d) les pompes de cale.
6 Exigences générales pour les circuits a.c

6.1 L’isolant du conducteur de protection doit être de couleur verte ou verte à bande jaune. Aucune de

ces deux couleurs ne doit être utilisée pour des conducteurs actifs.

NOTE Le conducteur de liaison équipotentielle de l’installation électrique d.c. comporte également un isolant

de couleur verte ou verte à bandes jaunes et il est raccordé à diverses parties accessibles exposées des appareils

électriques d.c., à d’autres éléments conducteurs étrangers et à la masse/terre du pôle négatif de l’installation d.c.

6.2 Pour un bateau ayant un circuit d.c. complètement isolé, le conducteur de protection a.c. doit être

relié à:
a) la coque, pour un bateau à coque métallique;

b) la plaque de masse/terre extérieure du bateau, pour un bateau à coque non conductrice.

6.3 Le ou les conducteurs de protection du circuit a.c. doivent comporter une borne finale (unique)

de connexion à la coque pour les bateaux à coque métallique, ou être raccordés à la borne principale de

terre/masse du bateau pour les bateaux à coque non métallique.

6.4 Sur les coques métalliques, la borne de connexion du conducteur de protection doit être située au-

dessus du niveau prévisible de toute d’accumulation d’eau.

6.5 Les enveloppes ou boîtiers métalliques contenant des appareils électriques a.c. installés à demeure

doivent être reliés la borne principale de terre/masse par un conducteur de protection équipotentiel (PE).

© ISO 2020 – Tous droits réservés 7
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ISO 13297:2020(F)
6.6 Les différents circuits ne doivent pas pouvoir être alimentés pa
...

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 13297
ISO/TC 188
Small craft — Electrical systems
Secretariat: SIS
— Alternating and direct current
Voting begins on:
2020­04­10 installations
Voting terminates on:
Petits navires — Installations électriques — Installations à courant
2020­06­05
alternatif continu
ISO/CEN PARALLEL PROCESSING
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/FDIS 13297:2020(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN­
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. ISO 2020
---------------------- Page: 1 ----------------------
ISO/FDIS 13297:2020(E)
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© ISO 2020

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ii © ISO 2020 – All rights reserved
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ISO/FDIS 13297:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 General requirements, DC and AC systems ............................................................................................................................... 5

5 General requirements, DC systems ................................................................................................................................................... 6

6 General requirements, AC systems .................................................................................................................................................... 7

7 Marking, AC systems ......................................................................................................................................................................................... 8

8 Batteries, DC systems ....................................................................................................................................................................................... 9

9 Battery-disconnect switch, DC systems ......................................................................................................................................11

10 Power source options, AC systems ..................................................................................................................................................11

11 Inverters and inverter/chargers, AC systems ......................................................................................................................12

12 Overcurrent protection, DC systems .............................................................................................................................................13

13 Overcurrent protection, AC systems .............................................................................................................................................14

13.1 General ........................................................................................................................................................................................................14

13.2 Supply circuits ......................................................................................................................................................................................14

13.3 Branch circuits .....................................................................................................................................................................................14

14 Ground-fault protection/earth-leakage protection, AC systems .....................................................................15

15 Panel boards (switchboards), DC and AC systems ..........................................................................................................15

16 Panel boards (switchboards), AC systems ..............................................................................................................................15

17 Conductors, DC and AC systems .........................................................................................................................................................15

18 Conductors, DC systems .............................................................................................................................................................................16

19 Conductors, AC systems ..............................................................................................................................................................................16

20 System wiring, DC and AC systems ..................................................................................................................................................17

21 System wiring, DC systems ......................................................................................................................................................................19

22 Socket outlets, DC systems ......................................................................................................................................................................19

23 Socket outlets, AC systems .......................................................................................................................................................................19

24 Appliances and equipment, AC systems ....................................................................................................................................19

25 Ignition protection, DC and AC systems .....................................................................................................................................19

26 Owner’s manual..................................................................................................................................................................................................20

Annex A (normative) Conductor requirements .....................................................................................................................................21

Annex B (normative) Instructions to be included with owner's manual ....................................................................23

Annex C (informative) Recommended system tests ..........................................................................................................................24

Annex D (informative) Typical AC system diagrams .........................................................................................................................25

Annex E (informative) Overcurrent protection location options.........................................................................................32

Annex ZA (informative) Relationship between this European Standard and the Essential

Requirements of Directive 2013/53/EU aimed to be covered ...........................................................................34

Bibliography .............................................................................................................................................................................................................................35

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ISO/FDIS 13297:2020(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non­governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to

the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see

www .iso .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 188, Small craft.

This fifth edition of ISO 13297 cancels and replaces ISO 13297:2014 and ISO 10133:2012, which have

been technically revised.
The main changes compared to the previous editions are as follows:

— combined the standard for alternating current (ISO 13297:2014) and the standard for direct current

(ISO 10133:2012) into a single marine electrical standard.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved
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FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 13297:2020(E)
Small craft — Electrical systems — Alternating and direct
current installations

IMPORTANT — The colours represented in the electronic file of this document can be neither

viewed on screen nor printed as true representations. For the purposes of colour matching,

see ISO 3864-4, which provides colorimetric and photometric properties together with, as a

guideline, references from colour order systems.
1 Scope

This document specifies the requirements for the design, construction and installation of the following

types of DC and AC electrical systems, installed on small craft either individually or in combination:

a) extra-low-voltage direct current (DC) electrical systems that operate at nominal potentials of

50 V DC or less;

b) single-phase alternating current (AC) systems that operate at a nominal voltage not exceeding

AC 250 V.
This document does not cover the following:

— electrical propulsion systems of direct current less than 1 500 V DC, single-phase alternating

current up to 1 000 V AC, and three­phase alternating current up to 1 00 V AC, which are addressed

by ISO 16315;

— any conductor that is part of an outboard engine assembly and that does not extend beyond the

outboard engine manufacturers supplied cowling;

— three-phase AC installations that operate at a nominal voltage not exceeding 500 V AC, which are

addressed by IEC 60092-507.
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.

ISO 7010:2019, Graphical symbols — Safety colours and safety signs — Registered safety signs

ISO 8846:1990, Small craft — Electrical devices — Protection against ignition of surrounding

flammable gases
ISO 10240:2019, Small craft — Owner’s manual

IEC 60309-2:1999, Plugs, socket-outlets and couplers for industrial purposes — Part 2: Dimensional

interchangeability requirements for pin and contact-tube accessories
IEC 60529:1989, Degrees of protection provided by enclosures (IP code)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

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

— ISO Online browsing platform: available at https:// www .iso .org/ obp
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ISO/FDIS 13297:2020(E)
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
craft’s ground/earth
protective ground

connection, provided for safety purposes, that is established by a conducting connection with the

common ground/earth (potential of the earth's surface)
3.2
equipotential bonding conductor

normally non-current-carrying conductor used to put various exposed conductive parts (3.15) of direct

current electrical devices and extraneous conductive parts (3.33) at a substantially equal potential

3.3
engine negative terminal

terminal on the engine, starter or solenoid to which the negative battery cable is connected

3.4
main grounding
earthing point

main point that provides connection for the DC negative conductor, AC protective grounding conductor

(3.10) and bonding conductor to the craft's ground that is established by a conducting connection

(intended or accidental) with the common ground (potential of the earth's surface)

Note 1 to entry: It can include any conductive part of the wetted surface of the hull in permanent contact with the

water, depending on the overall system design.
3.5
overcurrent protection device

device designed to interrupt the circuit when the current flow exceeds a predetermined value for a

predetermined time
EXAMPLE A fuse (3.29) or circuit breaker.
3.6
residual current device
RCD

electro-mechanical switching device or association of devices designed to make, carry and break

currents under normal service conditions and to cause the opening of contacts when the residual

current attains a given value under specified conditions

Note 1 to entry: RCDs serve to reduce the risk of injury to people from electrical shock hazard, and damage to

equipment from leakage of stray currents to earth or to other circuits.
3.7
polarization transformer

transformer that automatically orientates the neutral and active (phase) conductors (3.12) in the system

in the same polarity orientation as the polarized system (3.17) of the craft
3.8
isolation transformer

transformer installed in the shore power supply circuit on a craft to electrically isolate all the normally

live conductors (3.11) and the protective conductor (3.10) on the craft from the AC system conductors of

the shore power supply
3.9
neutral conductor

conductor intentionally maintained at ground potential and capable of contributing to the transmission

of electrical energy
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ISO/FDIS 13297:2020(E)
3.10
protective conductor
protective grounding conductor

conductor, not normally carrying current, used for some measure of protection against electric shock,

for electrically connecting any of the following parts of electrical equipment to the craft's ground/earth

and to the shore AC grounding conductor through the shore power cable:
a) exposed conductive parts of electrical equipment;
b) extraneous conductive parts (3.33);
c) the main grounding (earthing) terminal;
d) earth electrode(s);
e) the earth point of a source, or an artificial neutral
3.11
live conductor

conductor or conductive part intended to be energized in normal use, including a neutral conductor (3.9)

3.12
active (phase) conductor

conductor that is maintained at a difference of potential from the neutral or protective conductor (3.10)

Note 1 to entry: In a system that does not include a neutral or protective conductor, all conductors are considered

active conductors.
3.13
ignition-protected

designed and constructed to give protection against ignition of surrounding

flammable gases

Note 1 to entry: The protection against ignition of surrounding flammable gases is covered in ISO 8846:1990.

3.14
system voltage
nominal voltage supplied to the craft from a power source
3.15
exposed conductive part

conductive part of electrical equipment, which can be touched and which is not normally live, but which

can become live under fault conditions
3.16
panel board
switchboard

assembly of devices for the purpose of controlling and/or distributing electrical power

Note 1 to entry: It can include devices such as circuit breakers, fuses (3.29), switches, instruments, and indicators.

3.17
polarized system

system in which the live conductors (3.11) (active and neutral) are connected in the same relation to all

terminals on devices or receptacles (socket outlets) in a circuit
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ISO/FDIS 13297:2020(E)
3.18
fully insulated two-wire DC system

system in which both positive and negative poles remain isolated from the ground (earth), e.g. not

connected to the water through a metallic hull, the propulsion system or earthed through the AC

protective conductor (3.10)

Note 1 to entry: Some systems can use a momentary ground connection for engine starting purposes and can

remain isolated.
3.19
self-limiting

device whose maximum output is restricted to a specified value by its magnetic or electrical

characteristics
3.20
two-wire DC system with negative ground
system in which the DC negative is connected to the ground
3.21
shore power appliance inlet

fitting designed for mounting on a craft, of a shrouded male type, to connect to the female connector

on the craft end of the shore power cable in order to make the electrical connection for transmission of

electrical energy
3.22
trip-free circuit breaker

mechanical switching device capable of making, carrying and breaking currents under normal circuit

conditions and also making, carrying for a specified time and breaking currents under specified

abnormal circuit conditions such as those of overload or short circuit, and which is designed so that the

resetting means cannot be manually held in place to override the current-interrupting mechanism

3.23
accessible

capable of being reached for inspection, removal or maintenance without removal of permanent craft

structure
3.24
readily accessible

capable of being reached for use, inspection, removal or maintenance without the use of tools

3.25
sheath

uniform and continuous tubular protective covering of metallic or non­metallic material around one or

more insulated conductors

Note 1 to entry: Examples of appropriate materials include moulded rubber, moulded plastic, woven sleeving or

flexible tubing.
3.26
conduit

part of a closed wiring system of circular or non-circular cross-section for insulated conductors and/or

cables in electrical installations, allowing them to be drawn in and/or replaced
3.27
cable trunking

system of closed enclosures comprising a base with a removable cover intended for the complete

surrounding of insulated conductors, cables, cords and for the accommodation of other electrical

equipment
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ISO/FDIS 13297:2020(E)
3.28
double-pole circuit breaker

device intended to interrupt both the neutral and active (phase) conductors (3.12) in a circuit

simultaneously when a designated current is exceeded for a predetermined time
3.29
fuse

protective device that interrupts the circuit irreversibly when the current flow reaches a specified

value for a specific time
[SOURCE: ISO 8820-1:2014, 3.2, modified – Note 1 to entry has been deleted.]
3.30
galvanic isolator

device which can be installed in series with the AC protective conductor (3.10) of the shore power cable

to block low voltage DC galvanic current flow, but permits the passage of AC normally associated with

the protective conductor
3.31
inverter

device powered by a DC source, designed primarily to provide AC power at a required voltage and

frequency
3.32
inverter/charger

device designed to supply either AC power to a craft’s electrical system or to utilize the craft’s AC

electrical distribution system to charge or maintain a battery or batteries supplying DC

3.33
extraneous conductive part

conductive part liable to introduce a potential, generally ground/earth potential, and not forming part

of the electrical installation
3.34
ground plate

means to conduct the electrical current from a craft's conductive element to the water

4 General requirements, DC and AC systems
4.1 The hull of a metallic hull craft shall not be used as a circuit conductor.

4.2 Craft equipped with both DC and AC electrical systems shall have their distribution from either

separate panel boards, or from a common one with a partition, or from other positive means to separate

clearly the AC and DC sections from each other, and these shall be clearly identified.

4.3 Wiring diagrams to identify circuits, components and conductors shall be included with the craft.

After completing an AC installation, it is recommended to perform a system test according to Annex C.

4.4 Switches and controls shall be marked to indicate their function, unless the purpose of the switch

is obvious and its operation cannot, under normal operating conditions, cause a hazardous condition.

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ISO/FDIS 13297:2020(E)
5 General requirements, DC systems

5.1 The system type shall be either a fully insulated two wire DC system or a two-wire DC system with

negative ground. Engine-mounted wiring systems can use the engine block as the grounded conductor.

For DC systems with a negative ground, the main grounding/earthing point shall be either:

a) the engine negative terminal; or
b) a main grounding bus of sufficient current carrying capacity.

Systems with multiple battery banks shall have a common negative connection. Exceptions to this

are for dedicated power systems isolated from craft systems, e.g. propulsion systems that are clearly

identified as part of the isolated system.

5.2 An equipotential bonding conductor, if fitted, shall be connected to the craft's main grounding/

earthing point.

5.3 Protective devices such as trip free circuit breakers or fuses shall be provided at the source of

power, e.g. the panel board (switchboard), to interrupt any overload current in the circuit conductors

before heat can damage conductor insulation, connections or wiring system terminals.

5.3.1 The selection, arrangement and performance characteristics shall allow:

a) maximum continuity of service to healthy circuits when fault conditions exist in other circuits,

through selective operation of the various protective devices; and

b) protection of electrical equipment and circuits from damage due to overcurrents, by coordination

of the electrical characteristics of the circuit or apparatus and the tripping characteristics of the

protective devices.

5.4 All DC equipment shall be capable of function within a voltage range of 75 % to 133 % of nominal

voltage at the battery terminals, e.g.:
— for a 12 V system: 9 V to 16 V;
— for a 24 V system: 18 V to 32 V;
— for a 48 V system: 36 V to 64 V.

EXCEPTION Where the circuit includes equipment requiring a higher minimum voltage, the specified

minimum voltage shall be used in the calculation of the conductor size in accordance with Annex A.

5.5 The length and cross sectional area of conductors in each circuit shall be such that the calculated

voltage drop shall not exceed 10 % of the nominal voltage.

5.6 Equipment vital to safety, where the voltage drop is critical, shall be supplied with the proper

voltage to achieve the rated performance.
NOTE 1 See Annex A for voltage drop calculations.
NOTE 2 A 3 % voltage drop is acceptable for this equipment.

NOTE 3 Examples of circuits that may be dependent on a minimum voltage drop include:

a) panel board/switchboard main conductors;
b) navigation lights;
c) bilge blowers;
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ISO/FDIS 13297:2020(E)
d) bilge pumps.
6 General requirements, AC systems

6.1 The protective conductor insulation shall be green or green with a yellow stripe. Neither colour

shall be used for current-carrying conductors.

NOTE The equipotential bonding conductor of the DC electrical system also uses green or green with a

yellow stripe insulation and is connected to various exposed conductive parts of DC electrical devices, other

extraneous conductive parts and the DC negative ground/earth.

6.2 For craft having a fully insulated DC system, the AC protective conductor shall be connected to:

a) for metallic hulled craft, the hull;
b) for non-conductive hulls, the craft's external ground/earth or ground plate.

6.3 The AC protective conductor(s) shall be provided with a final (single) connection to the hull of a

metallic hull craft, or, if the craft has a non­metallic hull, to the main grounding/earthing point of the craft.

6.4 On metallic hulls, the point of connection of the protective conductor shall be located above any

anticipated water accumulation.

6.5 Metallic housings or enclosures of permanently installed AC electrical appliances shall be

connected to the protective conductor system in the craft.

6.6 Individual circuits shall not be capable of being energized by more than one source of electrical

power at a time. Each shore power inlet, generator or inverter is a separate source of electrical power.

The transfer from one power source circuit to another shall be made by a means which opens all current-

carrying conductors, active (phase) and neutral, before closing the alternate source circuit, to prevent

arc-over between contacts, and should be interlocked by mechanical or electromechanical means. A

device that simultaneously breaks both current carrying conductors, active (phase) and neutral, shall be

used when changing power sources.

The requirements for overcurrent protection are found in Clause 13. A combination of power sources

can be used provided that:
a) the device is constructed and tested to an applicable recognized standard;

b) the device includes protection to prevent backfeeding to shore power (anti­islanding protection);

c) the device includes personnel protection against backfeeding;
d) the installation is performed according to the manufacturer’s instructions.

6.7 Energized parts of electrical equipment shall be guarded against accidental contact by the use of

enclosures conforming to at least IEC 60529:1989-IP 2X or other protective means which shall not be

used for non-electrical equipment. Access to energized parts of the electrical system shall require the use

of hand tools or be at least IP 2X, unless otherwise specified. A suitable warning sign shall be displayed

(see 7.2).

6.8 The neutral conductor shall be grounded (earthed) only at the source of power, i.e. at the onboard

generator, the secondary of the isolation or polarization transformer, the shore power connection or

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ISO/FDIS 13297:2020(E)

inverter. The shore power neutral shall be grounded (earthed) through the shore power cable and shall

not be grounded (earthed) on board the craft or:

a) for systems using an isolation transformer or polarization transformer, both the generator

or inverter neutral and the transformer secondary neutrals may be grounded at the AC main

grounding bus instead of at the generator, inverter, or transformer secondaries;

b) for systems using an isolation transformer or polarization transformer, or no shore power

provision, both the generator or inverter neutral and the transformer secondary neutrals may be

ungrounded provided double­pole protection and switching is installed.

6.9 When a galvanic isolator is fitted in the protective conductor, failure of the isolator shall not result

in an open circuit.

6.10 If the polarity of the system must be maintained for the proper operation of the electrical devices

in the system, reverse polarity
...

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