IEC 60079-14:2013/ISH2:2020
(Main)Interpretation sheet 2 - Explosive atmospheres - Part 14: Electrical installations design, selection and erection
Interpretation sheet 2 - Explosive atmospheres - Part 14: Electrical installations design, selection and erection
Feuille d'interprétation 2 - Atmosphères explosives - Partie 14: Conception, sélection et construction des installations électriques
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Standards Content (Sample)
IEC 2020
INTERNATIONAL ELECTROTECHNICAL COMMISSION
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IEC 60079-14
Edition 5.0 2013-11
EXPLOSIVE ATMOSPHERES –
Part 14: Electrical installations design, selection and erection
INTERPRETATION SHEET 2
This interpretation sheet has been prepared by subcommittee 31J: Classification of hazardous
areas and installation requirements, of IEC technical committee 31: Equipment for explosive
atmospheres.
The text of this interpretation sheet is based on the following documents:
DISH Report on voting
31J/302/DISH 31J/303/RVDISH
Full information on the voting for the approval of this interpretation sheet can be found in the
report on voting indicated in the above table.
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Background
With changes to the Type of Protection designations in the IEC 60079 Series, a number of
these Type of Protection designations are not identified in the current edition of
IEC 60079-14. This may create confusion for end users regarding
...
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It does not include:
- other fundamental installation and inspection requirements for electrical installations;
- the verification of electrical equipment;
- protection or ventilation of rooms;
- gas detection systems;
- the repair, overhaul and reclamation of explosion protected equipment (see IEC 60079-19).
While this document does not include inspection of safety devices such as used in ventilated rooms (see IEC 60079-13), it does include the requirements for inspection and maintenance of individual items of equipment that will be part of such systems, for example motors or sensors. This document supplements the requirements for inspection and testing in non-hazardous areas in IEC 60364-6. This document is intended to be applied where there is a risk due to the potential presence of explosive gas or dust mixtures with air or combustible dust layers under normal atmospheric conditions. It does not apply to:
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IEC 60079-48:2023, which is a Technical Specification, provides guidance for an owner or operator for the use of portable or personal electronic equipment to be used in hazardous areas requiring Equipment Protection Level (EPL) Gb, Gc, Db, or Dc that are not otherwise commercially available with a certificate.
This document does not apply to:
• equipment that is electrically connected to fixed equipment or fixed wiring during use in the hazardous area, for example a lead light connected to the premises wiring system by a plug and socket,
• portable or personal equipment with a certificate for use in a hazardous area,
• transportable equipment,
• portable or personal equipment used in Group I applications,
• battery powered tools, such as drills and saws,
• portable or personal equipment used in areas requiring EPL Ga or Da equipment, or,
• medical devices.
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This document supplements the guidance in IEC 60079-14 regarding the use of personal or portable equipment without a certificate for use in hazardous areas.
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IEC 60079-10-1:2020 is concerned with the classification of areas where flammable gas or vapour hazards may arise and may then be used as a basis to support the proper design, construction, operation and maintenance of equipment for use in hazardous areas.
It is intended to be applied where there may be an ignition hazard due to the presence of flammable gas or vapour, mixed with air, but it does not apply to:
a) mines susceptible to firedamp;
b) the processing and manufacture of explosives;
c) catastrophic failures or rare malfunctions which are beyond the concept of normality dealt with in this standard;
d) rooms used for medical purposes;
e) domestic premises;
f) where a hazard may arise due to the presence of combustible dusts or combustible flyings but the principles may be used in assessment of a hybrid mixture.
Flammable mists may form or be present at the same time as flammable vapour. In such case the strict application of the details in this document may not be appropriate. Flammable mists may also form when liquids not considered to be a hazard due to the high flash point are released under pressure. In these cases the classifications and details given in this document do not apply.
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– located in a Zone 2 explosive atmosphere with or without an internal source of gas/vapour release and protected by artificial ventilation;
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– located in a Zone 1 or Zone 2 or Zone 21 or Zone 22 explosive atmosphere containing an internal source of gas/vapour release and protected by both pressurization and artificial ventilation.
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- other fundamental installation and inspection requirements for electrical installations;
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- the repair and reclamation of explosion protected equipment (see IEC 60079-19). This standard supplements the requirements of IEC 60364-6. In the case of dusts, fibres or flyings the level of housekeeping may influence the inspection and maintenance requirements. This standard is intended to be applied where there can be a risk due to the presence of explosive gas or dust mixtures with air or combustible dust layers under normal atmospheric conditions. It does not apply to:
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- dusts of explosives that do not require atmospheric oxygen for combustion,
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