IEC 60364-7-721:2007

Low-voltage electrical installations - Part 7-721: Requirements for special installations or locations - Electrical installations in caravans and motor caravans

The particular requirements of this part of IEC 60364 apply to the electrical installation of caravans and motor caravans. They modify or replace certain of the general requirements in Parts 1 to 6 of IEC 60364. They apply to those electrical circuits and equipment intended for the use of the caravan for habitation purposes. They do not apply to those electrical circuits and equipment for automotive purposes. They do not apply to the electrical installations of mobile homes, residential park homes and transportable units.

Installations électriques à basse tension - Partie 7-721: Exigences pour les installations ou emplacements spéciaux - Installations électriques dans les caravanes et caravanes à moteur

Les exigences particulières de la présente partie s'appliquent aux installations électriques des caravanes ou caravanes à moteur. Elles complètent, modifient ou remplacent certaines des exigences générales contenues dans les Parties 1 à 6 de la CEI 60364. Elles s'appliquent aux circuits et matériels électriques destinés à être utilisés dans les caravanes à des fins de logement. Elles ne s'appliquent pas aux circuits et matériels électriques destinés à la propulsion. Elles ne s'appliquent pas aux installations électriques intérieures des maisons d'habitation mobiles et caravanes résidentielles fixes ou des unités transportables.

General Information

• Status: Published
• Publication Date: 26-Apr-2007
• ICS: 29.020 - Electrical engineering in general
• ICS: 91.140.50 - Electricity supply systems
• Technical Committee: TC 64 - Electrical installations and protection against electric shock
• Drafting Committee: MT 33 - TC 64/MT 33
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 15-Jun-2017

Relations

• Revised: IEC 60364-7-721:2017 - Low-voltage electrical installations - Part 7-721: Requirements for special installations or locations - Electrical installations in caravans and motor caravans
• Effective Date: 05-Sep-2023

Standards Content (Sample)

INTERNATIONAL IEC
STANDARD
CEI
60364-7-721
NORME
First edition
INTERNATIONALE
Première édition
2007-04
Low-voltage electrical installations –
Part 7-721:
Requirements for special installations
or locations – Electrical installations
in caravans and motor caravans

Installations électriques à basse tension –
Partie 7-721:
Exigences pour les installations ou
emplacements spéciaux – Installations
électriques dans les caravanes
et caravanes à moteur
Reference number
Numéro de référence
IEC/CEI 60364-7-721:2007
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INTERNATIONAL IEC
STANDARD
CEI
60364-7-721
NORME
First edition
INTERNATIONALE
Première édition
2007-04
Low-voltage electrical installations –
Part 7-721:
Requirements for special installations
or locations – Electrical installations
in caravans and motor caravans

Installations électriques à basse tension –
Partie 7-721:
Exigences pour les installations ou
emplacements spéciaux – Installations
électriques dans les caravanes
et caravanes à moteur
PRICE CODE
U
CODE PRIX
Commission Electrotechnique Internationale
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue
Pour prix, voir catalogue en vigueur

– 2 – 60364-7-721 © IEC:2007
CONTENTS
FOREWORD.3
INTRODUCTION.5

721 Electrical installations in caravans and motor caravans.6
721.1 Scope.6
721.2 Normative references.6
721.3 Terms and definitions .8
721.31 Purposes, supplies and structure .8
721.313 Supplies .8
721.4 Protection for safety.8
721.41 Protection against electric shock.8
721.413 Protective measure: electrical separation.9
721.414 Protective measure: extra-low voltage provided by SELV and PELV .9
721.43 Protection against overcurrent .9
721.5 Selection and erection of equipment .10
721.51 Common rules.10
721.510 Introduction.10
721.512 Operational conditions and external influences .10
721.514 Identification .10
721.521 Types of wiring systems.10
721.522 Selection and erection of wiring systems in relation to external
influences .11
721.524 Cross-sectional areas of conductors .11
721.526 Electrical connections .11
721.528 Proximity of wiring systems to other services .11
721.53 Isolation, switching and control .11
721.536 Isolation and switching.11
721.543 Protective conductors .12
721.55 Other equipment.12

Annex A (normative) Instructions for electricity supply .14
Annex B (informative) Extra low-voltage d.c. installations .15
Annex C (informative) Current-carrying capacities .22
Annex D (informative) List of notes concerning certain countries .25

Bibliography.26

Figure C.1 – Graph for obtaining minimum cross-sectional area for conductors for
fixed wiring installations with a voltage drop of 0,8 V .22
Figure C.2 – Graph for obtaining minimum cross-sectional area for conductors for
battery cable installations with a voltage drop of 0,3 V.23

Table 721A – Cross-sectional areas of flexible cords and cables for caravan
connection .13
Table B.721.1 – Functional allocation and cross-sectional areas of cores for caravan
connectors.18

60364-7-721 © IEC:2007 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LOW-VOLTAGE ELECTRICAL INSTALLATIONS –

Part 7-721: Requirements for special installations or locations –
Electrical installations in caravans and motor caravans

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
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9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60364-7-721 has been prepared by IEC technical committee 64:
Electrical installations and protection against electrical shock.
The text of this standard is based on the following documents:
FDIS Report on voting
64/1576/FDIS 64/1596/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.

– 4 – 60364-7-721 © IEC:2007
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The reader’s attention is drawn to the fact that Annex D lists all of the “in-some-country”
clauses on differing practices of a less permanent nature relating to the subject of this
standard.
A list of all the parts in the IEC 60364 series, under the general title Low-voltage electrical
installations, can be found on the IEC website.
Future standards in this series will carry the new general title as cited above. Titles of existing
standards in this series will be updated at the time of the next edition.
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
60364-7-721 © IEC:2007 – 5 –
INTRODUCTION
The requirements of this part of IEC 60364 supplement, modify or replace certain of the
general requirements in Parts 1 t
...