Small craft — Electrical devices — Protection against ignition of surrounding flammable gases

Describes test methods and requirements for the design of electrical devices to be used on small craft so that they may be operated in an explosive atmosphere without igniting surrounding flammable gases.

Petits navires — Appareils électriques — Protection contre l’inflammation des gaz inflammables environnants

La présente Norme internationale prescrit les méthodes d'essai et fixe les prescriptions de conception relatives aux équipements électriques installés sur des navires de plaisance et devant être utilisés en atmosphère explosive sans risquer de provoquer l'explosion des gaz inflammables environnants. Elle n'est pas applicable aux systèmes antidéflagrants ou aux appareillages électriques protégés contre l'explosion tels que définis dans la CEI 79-0. [1] La présente Norme internationale ne traite pas des procédures de protection contre la détérioration des produits ou des éléments fonctionnant dans des mélanges d'hydrogène et d'air. Elle ne traite pas non plus des mécanismes d'inflammation par sources extérieures du type électricité statique, foudre ou autres facteurs non liés à l'appareillage essayé.

General Information

Status
Not Published
Technical Committee
Drafting Committee
Current Stage
5020 - FDIS ballot initiated: 2 months. Proof sent to secretariat
Start Date
30-May-2025
Completion Date
30-May-2025
Ref Project

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FINAL DRAFT
International
Standard
ISO/TC 188
Small craft — Electrical devices
Secretariat: SIS
— Protection against ignition of
Voting begins on:
surrounding flammable gases
2025-05-30
Petits navires — Appareils électriques — Protection contre
Voting terminates on:
l’inflammation des gaz inflammables environnants
2025-07-25
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
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/CEN PARALLEL PROCESSING 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.
Reference number
FINAL DRAFT
International
Standard
ISO/TC 188
Small craft — Electrical devices
Secretariat: SIS
— Protection against ignition of
Voting begins on:
surrounding flammable gases
Petits navires — Appareils électriques — Protection contre
Voting terminates on:
l’inflammation des gaz inflammables environnants
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.
© ISO 2025
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/CEN PARALLEL PROCESSING
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
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 Reference number
ii
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Test requirements . 2
5 External surface temperature test . 2
6 Test method — Sealed devices . 2
6.1 General .2
6.2 Apparatus .3
6.3 Test procedure .3
7 Test method — Non-sealed devices . 3
7.1 General .3
7.2 Apparatus .4
7.3 Electrical device preparation .6
7.4 Test procedure .6
7.5 Additional requirements for non-sealed electrical devices .7
7.5.1 Cranking motors .7
7.5.2 Distributors . . .7
7.5.3 Alternators .7
8 Identification . 7
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2013/53/EU aimed to be covered. 8
Bibliography . 9

iii
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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 second edition cancels and replaces the first edition (ISO 8846:1990), which has been technically
revised.
The main changes are as follows:
— the Scope has been updated for clarity;
— the definitions have been updated in Clause 3;
— throughout the text, requirements have been updated to meet the state of the art;
— the former 6.4.3 on intrinsically safe devices has been removed;
— 7.5.3 for alternators has been added;
— Clause 8 on marking has been updated.
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
FINAL DRAFT International Standard ISO/FDIS 8846:2025(en)
Small craft — Electrical devices — Protection against ignition
of surrounding flammable gases
1 Scope
This document specifies test methods and requirements for the design of electrical devices, when under
normal operating conditions, on small craft so that they can be operated without igniting a surrounding
flammable gas atmosphere.
This document does not apply to ignition protection procedures for:
— devices or components that can operate in hydrogen and air mixtures;
— devices with dysfunctional issues;
— mechanisms of ignition from external sources, such as static electricity, lightning or other factors not
related to the equipment under test.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
flammable hydrocarbon mixture
mixture of propane and air (per cent by volume) between the lower flammable limit (LFL) and upper
flammable limit (UFL) that will explode if ignited by any means
Note 1 to entry: Tests using propane and air cover marine fuel and air mixtures between the LFL and UFL.
3.2
ignition-protected device
device that cannot ignite a flammable hydrocarbon mixture (3.1) by excessive external surface temperature
or by an internally generated arc
3.3
normal operating conditions
operating conditions of the device, including the maximum achievable overload up to 400 % of the rated
current (circuit breakers, switches, etc.) and a stalled rotor condition for any motor with the circuit
protected by an overcurrent protective device specified by the product manufacturer

3.4
craft
small craft
recreational boat, and other watercraft using similar equipment, of up to 24 m length of hull (L )
H
Note 1 to entry: The measurement methodology for length of hull is defined in ISO 8666.
[SOURCE: ISO 8666:2020, 3.15, modified — Note 1 to entry added.]
4 Test requirements
4.1 Electrical devices shall be tested in accordance with Clause 5 except for electrical devices not rated for
continuous operation or operated intermittently (engine-cranking motors, propulsion unit trim motors, etc.).
4.2 Electrical devices, which under normal operating conditions can produce sparks or arcs, shall be
tested in accordance with Clause 6 if they are sealed, or in accordance with Clause 7 if they are non-sealed.
NOTE Devices that are explosion-protected meet the ignition protection requirements of Clauses 5, 6 and 7 when
installed in accordance with the associated markings and instructions. Requirements for explosion-protected devices
are found in IEC 60079-0.
5 External surface temperature test
5.1 The electrical device shall be placed in a closed, thermally insulated air-circulating oven having an
initial temperature of 60 °C ± 2 °C. Suitable heating shall be provided in addition to that generated by the
component in order to keep the temperature in the oven constant at 60 °C ± 2 °C.
5.2 The test voltage supply shall be adjusted within the range of 80 % to 120 % of the nominal system
voltage giving the greatest temperature increase. For alternators, the test requirements in 7.5.3 shall apply.
5.3 The electrical device shall be operated continuously for a minimum of 7 h, or until thermal stability of
2 K/h is reached, in the mode in which it draws its maximum current.
The temperature should not change at rate more than 2 Kelvin per hour (not more than 2 °C per hour) to be
considered a stable reading.
5.4 The maximum allowable surface temperature shall be no more than 200 °C, measured at any point on
the electrical device exterior.
6 Test method — Sealed devices
6.1 General
Testing in accordance with 6.2 and 6.3 shall be carried out on electrical devices which under normal
operating conditions can produce sparks or arcs and are considered to be so tight that no surrounding g
...


Date: 2024-08-05
ISO/TC 188/WG 5
Secretariat: SIS
Date: 2025-05-14
Small craft — Electrical devices — Protection against ignition of
surrounding flammable gases
Petits navires — Appareils électriques — Protection contre l’inflammation des gaz inflammables environnants
FDIS stage
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
E-mail: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
Contents
Foreword . iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Test requirements . 2
5 External surface temperature test . 2
6 Test method — Sealed devices . 2
6.1 General . 2
6.2 Apparatus . 2
6.3 Test procedure . 3
7 Test method — Non-sealed devices . 3
7.1 General . 3
7.2 Apparatus . 4
7.3 Electrical device preparation . 6
7.4 Test procedure . 6
7.5 Additional requirements for non-sealed electrical devices . 7
8 Identification . 7
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2013/53/EU aimed to be covered . 8
Bibliography . 10

iii
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent rights
in respect thereof. As of the date of publication of this document, ISO had not received notice of (a) patent(s)
which may be required to implement this document. However, implementers are cautioned that this may not
represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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 second edition cancels and replaces the first edition (ISO 8846:1990), which has been technically revised.
The main changes are as follows:
— the Scope has been updated for clarity;
— the definitions have been updated in Clause 3;
— throughout the text, requirements have been updated to meet the state of the art;
— the former 6.4.3 on intrinsically safe devices has been removed;
— 7.5.3 for alternators has been added;
— Clause 8 on marking has been updated.
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
Small craft — Electrical devices — Protection against ignition of
surrounding flammable gases
1 Scope
This document specifies test methods and requirements for the design of electrical devices, when under
normal operationoperating conditions, on small craft so that they can be operated without igniting a
surrounding flammable gas atmosphere.
This document does not apply to ignition protection procedures for:
— devices or components that can operate in hydrogen and air mixtures;
— devices with dysfunctional issues;
— mechanisms of ignition from external sources, such as static electricity, lightning or other factors not
related to the equipment under test.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
3.1
flammable hydrocarbon mixture
mixture of propane and air (per cent by volume) between the lower flammable limit (LFL) and upper
flammable limit (UFL) that will explode if ignited by any means
Note 1 to entry: Tests using propane and air cover marine fuel and air mixtures between the LFL and UFL.
3.2
ignition-protected device
device that cannot ignite a flammable hydrocarbon mixture (3.1) by excessive external surface temperature or
by an internally generated arc.
3.3
normal operating conditions
operating conditions of the device, including the maximum achievable overload up to 400 % of the rated
current (circuit breakers, switches, etc.) and a stalled rotor condition for any motor with the circuit protected
by an overcurrent protective device specified by the product manufacturer
3.4
craft
small craft
recreational boat, and other watercraft using similar equipment, of up to 24 m length of hull (L )
H
Note 1 to entry: The measurement methodology for length of hull is defined in ISO 8666.
[SOURCE: ISO 8666:2020, 3.15, modified — Note 1 to entry added.]
4 Test requirements
4.1 Electrical devices shall be tested in accordance with Clause 5 except for electrical devices not rated for
continuous operation or operated intermittently (engine-cranking motors, propulsion unit trim motors, etc.).
4.2 Electrical devices, which under normal operationoperating conditions can produce sparks or arcs, shall
be tested in accordance with Clause 6 if they are sealed, or in accordance with Clause 7 if they are non-sealed.
NOTE Devices that are explosion-protected meet the ignition protection requirements of Clauses 5, 6and 7 of this
document when installed in accordance with the associated markings and instructions. Requirements for explosion-
protected devices are found in IEC 60079-0.
5 External surface temperature test
5.1 The electrical device shall be placed in a closed, thermally insulated air-circulating oven having an initial
temperature of 60 °C ± 2 °C. Suitable heating shall be provided in addition to that generated by the component
in order to keep the temperature in the oven constant at 60 °C ± 2 °C.
5.2 The test voltage supply shall be adjusted within the range of 80 % to 120 % of the nominal system
voltage giving the greatest temperature increase. For alternators, the test requirements in 7.5.3 shall apply.
5.3 The electrical device shall be operated continuously for a minimum of 7 h, or until thermal stability of
2 K/h is reached, in the mode in which it draws its maximum current.
NOTE theThe temperature should not change at rate more than 2 Kelvin per hour (not more than 2 °C per
hour) to be considered a stable reading.
5.4 The maximum allowable surface temperature shall be no more than 200 °C, measured at any point on
the electrical device exterior.
6 Test method — Sealed devices
6.1 General
Testing in accordance with 6.2 and 6.3 shall be carried out on electrical devices which under normal
operationoperating conditions can produce sparks or arcs and are considered to be so tight that no
surrounding gases can penetrate into them.
Hermetically sealed devices, in which the seal is made by fusion of metal to metal or glass to metal, are
considered as meeting the requirements for sealed devices without testing.
6.2 Apparatus
6.2.1 Water chamber, as illustrated in Figure 1.
Key
1 water chamber
2 water
3 device under test
Figure 1 — Water chamber for sealed devices
6.3 Test procedure
6.3.1 Submerge the electrical device to be tested in a water chamber at ambient temperature, changing its
attitude if necessary, so that all possible sources of leaks are at the top and are 340 mm to 370 mm below the
water surface. Submerged time is 15 min for each attitude change.
6.3.2 Observe the electrical device under test carefully throughout the test duration for a leak as evidenced
by the generation of a bubble or stream of bubbles.
6.3.3 If bubbles are observed coming out of the electrical portion of the device, the electrical device shall not
be considered sealed and shall be tested in accordance with Clause 7.
6.3.4 If no bubbles are observed, remove the electrical device from the water chamber and dry its exterior.
6.3.5 Dismantle the electrical device for internal inspection.
6.3.6 If no water is found inside the electrical device, it shall be accepted as a sealed ignition-protected
device. If water is found, it shall be tested in accordance with Clause 7.
7 Test method — Non-sealed devices
7.1 General
Testing in accordance with 7.2 to 7.5 shall be carried out on electrical devices which under normal
operationoperating conditions can produce sparks or arcs and are considered to be open so that surrounding
gases can penetrate into them.
7.2 Apparatus
7.2.1 Test assembly, as illustrated in Figure 2 for large non-sealed electrical devices or Figure 3 for small
non-sealed electrical devices. The test chamber shall be equipped with a pressure-relief lid.

Key
1 pressure relief lid 13 chamber gas analyser
2 test chamber 14 flow meters
3 pressure transducer 15 air
4 device under test 16 propane
5 device spark-plug 17 flow adjustment valves
6 device mixture supply tube 18 High Tensionhigh-tension ignition coils
7 chamber mixture supply tube 19 vibrator
8 copper vent tube (when required) 20 single-shot spark
9 chamber spark-plug 21 control switch
10 shut-off valves 22 12 V DC current
11 mixing chambers 23 device gas analyser supply tube
12 device gas analyser
Figure 2 — Test assembly for large non-sealed electrical devices
Key
1 pressure relief lid 12 device gas analyser
2 test chamber 13 chamber gas analyser
3 short length of transparent tubing 14 flow meters
4 circuit breaker (shown as example) 15 air
5 device mixture supply tube 16 propane
6 copper vent tube (when required) 17 flow adjustment v
...


PROJET FINAL
Norme
internationale
ISO/TC 188
Petits navires — Appareils
Secrétariat: SIS
électriques — Protection
Début de vote:
contre l’inflammation des gaz
2025-05-30
inflammables environnants
Vote clos le:
2025-07-25
Small craft — Electrical devices — Protection against ignition of
surrounding flammable gases
LES DESTINATAIRES DU PRÉSENT PROJET SONT
INVITÉS À PRÉSENTER, AVEC LEURS OBSERVATIONS,
NOTIFICATION DES DROITS DE PROPRIÉTÉ DONT ILS
AURAIENT ÉVENTUELLEMENT CONNAISSANCE ET À
FOURNIR UNE DOCUMENTATION EXPLICATIVE.
OUTRE LE FAIT D’ÊTRE EXAMINÉS POUR
ÉTABLIR S’ILS SONT ACCEPTABLES À DES FINS
INDUSTRIELLES, TECHNOLOGIQUES ET COM-MERCIALES,
AINSI QUE DU POINT DE VUE DES UTILISATEURS, LES
PROJETS DE NORMES
TRAITEMENT PARALLÈLE ISO/CEN
INTERNATIONALES DOIVENT PARFOIS ÊTRE CONSIDÉRÉS
DU POINT DE VUE DE LEUR POSSI BILITÉ DE DEVENIR DES
NORMES POUVANT
SERVIR DE RÉFÉRENCE DANS LA RÉGLEMENTATION
NATIONALE.
Numéro de référence
PROJET FINAL
Norme
internationale
ISO/TC 188
Petits navires — Appareils
Secrétariat: SIS
électriques — Protection
Début de vote:
contre l’inflammation des gaz
2025-05-30
inflammables environnants
Vote clos le:
2025-07-25
Small craft — Electrical devices — Protection against ignition of
surrounding flammable gases
LES DESTINATAIRES DU PRÉSENT PROJET SONT
INVITÉS À PRÉSENTER, AVEC LEURS OBSERVATIONS,
NOTIFICATION DES DROITS DE PROPRIÉTÉ DONT ILS
AURAIENT ÉVENTUELLEMENT CONNAISSANCE ET À
FOURNIR UNE DOCUMENTATION EXPLICATIVE.
DOCUMENT PROTÉGÉ PAR COPYRIGHT
OUTRE LE FAIT D’ÊTRE EXAMINÉS POUR
ÉTABLIR S’ILS SONT ACCEPTABLES À DES FINS
© ISO 2025 INDUSTRIELLES, TECHNOLOGIQUES ET COM-MERCIALES,
AINSI QUE DU POINT DE VUE DES UTILISATEURS, LES
Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, aucune partie de cette
PROJETS DE NORMES
TRAITEMENT PARALLÈLE ISO/CEN
INTERNATIONALES DOIVENT PARFOIS ÊTRE CONSIDÉRÉS
publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique,
DU POINT DE VUE DE LEUR POSSI BILITÉ DE DEVENIR DES
y compris la photocopie, ou la diffusion sur l’internet ou sur un intranet, sans autorisation écrite préalable. Une autorisation peut
NORMES POUVANT
être demandée à l’ISO à l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
SERVIR DE RÉFÉRENCE DANS LA RÉGLEMENTATION
NATIONALE.
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 Numéro de référence
ii
Sommaire Page
Avant-propos .iv
1 Domaine d’application . 1
2 Références normatives . 1
3 Termes et définitions . 1
4 Exigences d'essai . 2
5 Essai de mise en température de la surface extérieure . 2
6 Méthode d’essai — Dispositifs scellés . 2
6.1 Généralités .2
6.2 Appareillage .3
6.3 Mode opératoire d'essai.3
7 Méthode d’essai — Dispositifs non scellés . 4
7.1 Généralités .4
7.2 Appareillage .4
7.3 Préparation de l’appareil électrique .8
7.4 Mode opératoire d'essai.8
7.5 Exigences supplémentaires relatives aux équipements électriques non scellés .9
7.5.1 Démarreurs .9
7.5.2 Distributeurs .9
7.5.3 Alternateurs .9
8 Identification . 9
Annexe ZA (informative) Relation entre la présente Norme européenne et les exigences
essentielles concernées de la Directive 2013/53/UE .10
Bibliographie .12

iii
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’ISO attire l’attention sur le fait que la mise en application du présent document peut entraîner l’utilisation
d’un ou de plusieurs brevets. L’ISO ne prend pas position quant à la preuve, à la validité et à l’applicabilité de
tout droit de brevet revendiqué à cet égard. À la date de publication du présent document, l’ISO n’avait pas
reçu notification qu’un ou plusieurs brevets pouvaient être nécessaires à sa mise en application. Toutefois,
il y a lieu d’avertir les responsables de la mise en application du présent document que des informations
plus récentes sont susceptibles de figurer dans la base de données de brevets, disponible à l'adresse
www.iso.org/brevets. L'ISO ne saurait être tenue pour responsable de ne pas avoir identifié de tels droits de
propriété et averti de leur existence.
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/avant-propos.
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).
Cette seconde édition annule et remplace la première édition (ISO 8846:1990) qui a fait l'objet d'une révision
technique.
Les principales modifications sont les suivantes:
— le Domaine d’application a été mis à jour pour plus de clarté;
— les définitions ont été mises à jour à l’Article 3;
— dans l’ensemble du texte, les exigences ont été mises à jour pour répondre à l’état de l’art;
— l’ancien paragraphe 6.4.3 sur les équipements à sécurité intégrée a été supprimé;
— le paragraphe 7.5.3 relatif aux alternateurs a été ajouté;
— l’Article 8 relatif au marquage a été mis à jour.
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
PROJET FINAL Norme internationale ISO/FDIS 8846:2025(fr)
Petits navires — Appareils électriques — Protection contre
l’inflammation des gaz inflammables environnants
1 Domaine d’application
Le présent document spécifie des méthodes d’essai et des exigences relatives à la conception des appareils
électriques qui, dans des conditions normales de fonctionnement, sont utilisés sur les petits navires de
manière à ce qu'ils puissent fonctionner sans enflammer une atmosphère de gaz inflammables environnants.
Le présent document ne s’applique pas aux modes opératoires de protection contre l’inflammation:
— des appareils ou des éléments qui peuvent fonctionner dans des mélanges d’hydrogène et d’air;
— des appareils qui rencontrent des problèmes de dysfonctionnement;
— des mécanismes d’inflammation par des sources extérieures du type électricité statique, foudre ou
autres facteurs non liés à l’appareil soumis à essai.
2 Références normatives
Le présent document ne contient aucune référence normative.
3 Termes et définitions
Pour les besoins du présent document, les termes et définitions suivants s'appliquent.
L'ISO et l'IEC tiennent à jour des bases de données terminologiques destinées à être utilisées en normalisation,
consultables aux adresses suivantes:
— ISO Online browsing platform: disponible à l'adresse https:// www .iso .org/ obp
— IEC Electropedia: disponible à l'adresse https:// www .electropedia .org/
3.1
mélange inflammable d’hydrocarbures
mélange de propane et d’air (pourcentage en volume) se situant entre la limite inférieure d'inflammabilité (LII)
et la limite supérieure d’inflammabilité (LSI), qui explosera s'il est enflammé par quelque moyen que ce soit
Note 1 à l'article: Tous les essais à base de propane et d’air couvrent les mélanges combustible marin-air compris entre
la LII et la LSI.
3.2
dispositif protégé contre l’inflammation
dispositif qui ne peut pas enflammer un mélange inflammable d’hydrocarbures (3.1) en raison d’une
température excessive de la surface extérieure ou d’un arc interne
3.3
conditions normales de fonctionnement
conditions de fonctionnement du dispositif, y compris la surcharge maximale possible jusqu’à 400 % du
courant nominal (disjoncteurs, commutateurs, etc.), et en condition de calage du rotor pour un moteur à
circuit protégé par un dispositif de protection contre les surintensités spécifié par le fabricant du produit

3.4
bateau
petit navire
bateau de plaisance, ou autre embarcation utilisant un équipement similaire, d’une longueur de coque (L )
H
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.]
4 Exigences d'essai
4.1 Les appareils électriques doivent être soumis à essai conformément à l’Article 5, à l’exception des
appareils électriques qui ne sont pas prévus pour fonctionner en continu ou de ceux à fonctionnement
intermittent (démarreurs de moteurs, moteurs d’appoint du système de propulsion, etc.).
4.2 Les appareils électriques qui, dans des conditions normales de fonctionnement, peuvent provoquer
des étincelles ou des arcs, doivent être soumis à essai conformément à l’Article 6, s’ils sont scellés ou
conformément à l’Article 7, dans le cas contraire.
NOTE Les appareils protégés contre les risques d’explosion remplissent les exigences de protection contre
l’inflammation des Articles 5, 6 et 7 lorsqu’ils
...

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