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IEC 60079-14:2007

(Main)

Explosive atmospheres - Part 14: Electrical installations design, selection and erection

Explosive atmospheres - Part 14: Electrical installations design, selection and erection

This part of IEC 60079 contains the specific requirements for the design, selection and erection of electrical installations in hazardous areas associated with explosive atmospheres. Where the equipment is required to meet other environmental conditions, for example, protection against ingress of water and resistance to corrosion, additional methods of protection may be necessary. The method used should not adversely affect the integrity of the enclosure. The requirements of this standard apply only to the use of equipment under normal or near normal atmospheric conditions. The significant technical changes with respect to the previous edition are: Equipment Protection Levels (EPLs) have been introduced and are explained in the new Annex I and dust requirements included from IEC 61241 14, Ed. 1.0.

Atmosphères explosives - Partie 14: Conception, sélection et construction des installations électriques

La présente partie de la CEI 60079 établit les exigences particulières de conception, de sélection et de montage applicables aux installations électriques situées dans des emplacements dangereux en relation avec des atmosphères explosives. Lorsqu'il est exigé que le matériel soit conforme à d'autres conditions environnementales, par exemple la protection contre la pénétration de l'eau et la résistance à la corrosion, des méthodes complémentaires de protection peuvent être nécessaires. Il convient que la méthode utilisée ne dégrade pas l'intégrité de l'enveloppe. Les exigences de la présente norme s'appliquent uniquement à l'utilisation de matériels dans des conditions atmosphériques normales ou proches de la normale. Les modifications techniques significatives par rapport à l'édition précédente sont les suivantes: Les niveaux de protection de matériel (EPLs pour " Equipment Protection Levels ") ont été introduits et ils sont expliqués dans une nouvelle Annexe I et les exigences pour les poussières issues de la CEI 61241-14, ed 1.0.

General Information

Status
Published
Publication Date
12-Dec-2007
ICS
29.260.20 - Electrical apparatus for explosive atmospheres
Technical Committee
SC 31J - Classification of hazardous areas and installation requirements
Drafting Committee
MT 60079-14 - TC 31/SC 31J/MT 60079-14
Current Stage
DELPUB - Deleted Publication
Completion Date
29-Nov-2013
Ref Project

Relations

Replaces
IEC 61241-14:2004 - Electrical apparatus for use in the presence of combustible dust - Part 14: Selection and installation
Effective Date
05-Sep-2023
Revised
IEC 60079-14:2013 - Explosive atmospheres - Part 14: Electrical installations design, selection and erection
Effective Date
05-Sep-2023
Revises
IEC 60079-14:2002 - Electrical apparatus for explosive gas atmospheres - Part 14: Electrical installations in hazardous areas (other than mines)
Effective Date
05-Sep-2023

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IEC 60079-14:2007 - Explosive atmospheres - Part 14: Electrical installations design, selection and erection Released:12/13/2007 Isbn:2831894913IEC 60079-14:2007 - Explosive atmospheres - Part 14: Electrical installations design, selection and erection Released:12/13/2007 Isbn:2831894913
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IEC 60079-14:2007 - Explosive atmospheres - Part 14: Electrical installations design, selection and erection Released:12/13/2007 Isbn:2831894913
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196 pages
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IEC 60079-14
Edition 4.0 2007-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Explosive atmospheres –
Part 14: Electrical installations design, selection and erection

Atmosphères explosives –
Partie 14: Conception, sélection et construction des installations électriques

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by
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IEC 60079-14
Edition 4.0 2007-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Explosive atmospheres –
Part 14: Electrical installations design, selection and erection

Atmosphères explosives –
Partie 14: Conception, sélection et construction des installations électriques

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
XD
CODE PRIX
ICS 29.260.20 ISBN 2-8318-9491-3

– 2 – 60079-14 © IEC:2007
CONTENTS
FOREWORD.8
INTRODUCTION.10

1 Scope.13
2 Normative references .13
3 Terms and definitions .16
3.1 General .16
3.2 Hazardous areas .16
3.3 Flameproof enclosure.17
3.4 Increased safety.17
3.5 Intrinsic safety - General .18
3.6 Intrinsic safety parameters .19
3.7 Pressurization .19
3.8 Type of protection 'n' .19
3.13 Electrical supply systems .20
3.14 Equipment.21
4 General .21
4.1 General requirements.21
4.2 Documentation .22
4.3 Assurance of conformity of equipment .23
4.3.1 Equipment with certificates according to IEC standards .23
4.3.2 Equipment without certificates according to IEC standards .23
4.3.3 Selection of repaired, second hand or existing equipment .23
4.4 Qualifications of personnel .23
5 Selection of equipment (excluding cables and conduits) .24
5.1 Information requirements.24
5.2 Zones.24
5.3 Relationship between Equipment protection levels (EPLs) and zones.24
5.4 Selection of equipment according to EPLs.25
5.4.1 Relationship between EPLs and types of protection.25
5.4.2 Equipment for use in locations requiring EPL 'Ga' or 'Da'.26
5.4.3 Equipment for use in locations requiring EPL ‘Gb’ or 'Db' .26
5.4.4 Equipment for use in locations requiring EPL ‘Gc’ or ‘Dc’.26
5.5 Selection according to equipment grouping .26
5.6 Selection according to the ignition temperature of the gas, vapour or dust
and ambient temperature.27
5.6.1 General .27
5.6.2 Gas or Vapour .27
5.6.3 Dust .27
5.7 Selection of radiating equipment for dust.30
5.7.1 Ignition process .30
5.7.2 Safety measures in zone 20 or 21.30
5.7.3 Safety measures in zone 22 .31
5.8 Selection of ultrasonic equipment for dust .31
5.8.1 Ignition process .31
5.8.2 Safety measures.31

60079-14 © IEC:2007 – 3 –
5.9 External influences.31
5.10 Light metals as construction materials.32
5.10.1 Gas or vapour.32
5.10.2 Dust .32
5.11 Transportable, Portable and Personal equipment .33
5.11.1 General .33
5.11.2 Transportable and Portable equipment - Gas.33
5.11.3 Personal Equipment - Gas.33
5.11.4 Dust .33
5.12 Selection of rotating electrical machines.34
5.12.1 General .34
5.12.2 Motors fed from a converter supply.34
5.13 Luminaires .34
5.14 Plugs and socket outlets for dust.34
5.14.1 General .34
5.14.2 Mounting .34
5.14.3 Location .35
6 Protection from dangerous (incendive) sparking .35
6.1 Danger from live parts .35
6.2 Danger from exposed and extraneous conductive parts.35
6.2.1 TN type of system earthing .35
6.2.2 TT type of system earthing .35
6.2.3 IT type of system earthing .35
6.2.4 SELV and PELV systems.35
6.2.5 Electrical separation .36
6.2.6 Above hazardous areas .36
6.3 Potential equalization .36
6.3.1 General .36
6.3.2 Temporary bonding.37
6.4 Static electricity.37
6.4.1 Gas .37
6.4.2 Dust .38
6.5 Lightning protection.38
6.6 Electromagnetic radiation .38
6.7 Cathodically protected metallic parts .38
6.8 Ignition by optical radiation.39
7 Electrical protection.39
7.1 General .
...

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