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IEC

IEC 60079-0:2017/ISH2:2019

(Main)

Interpretation Sheet 2 - Explosive atmospheres - Part 0: Equipment - General requirements

Interpretation Sheet 2 - Explosive atmospheres - Part 0: Equipment - General requirements

Feuille d'interprétation 2 - Atmosphères explosives - Partie 0: Matériel - Exigences générales

General Information

Status
Published
Publication Date
26-Jun-2019
ICS
29.260.20 - Electrical apparatus for explosive atmospheres
Technical Committee
TC 31 - Equipment for explosive atmospheres
Drafting Committee
WG 22 - TC 31/WG 22
Current Stage
PPUB - Publication issued
Start Date
26-Jul-2019
Completion Date
27-Jun-2019
Ref Project

Relations

Revises
IEC 60079-0:2017 - Explosive atmospheres - Part 0: Equipment - General requirements
Effective Date
05-Sep-2023

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IEC 60079-0:2017/ISH2:2019 - Interpretation Sheet 2 - Explosive atmospheres - Part 0: Equipment - General requirements Released:6/27/2019IEC 60079-0:2017/ISH2:2019 - Interpretation Sheet 2 - Explosive atmospheres - Part 0: Equipment - General requirements Released:6/27/2019
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IEC 60079-0:2017/ISH2:2019 - Interpretation Sheet 2 - Explosive atmospheres - Part 0: Equipment - General requirements Released:6/27/2019
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Standards Content (Sample)


 IEC 2019
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
IEC 60079-0
Edition 7.0  2017-12
EXPLOSIVE ATMOSPHERES –
Part 0: Equipment – General requirements

INTERPRETATION SHEET 2
This interpretation sheet has been prepared by IEC technical committee 31: Equipment for
explosive atmospheres.
The text of this interpretation sheet is based on the following documents:
DISH Report on voting
31/1469/DISH 31/1486/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.

___________
Question:
How shall marking be shown for equipment covered by both the electrical and non-electrical
standards (IEC 60079 and ISO 80079 series)?
Answer:
Equipment which includes both an electrical part and a non-electrical part shall have
combined marking. For example:
Ex db h IIA T4 Gb
Ex h tb IIIC T135 °C Db
ICS 29.260.20
IEC 60079-0:2017-12/ISH2:2019-06(en-fr)

– 2 – IEC 60079-0:2017/ISH2:2019
 IEC 2019
It will be clearer for the user that the combined risk of the electrical part and the non-electrical
part, covered by a single certificate, has been assessed for the complete equipment, stating
one EPL, one equipment Group and one temperature class for Gas and the same for Dust
(but showing a maximum surface temperature instead of a temperature class). It is also noted
that Ex Components are not marked with either a temperature class (Group II) or a maximum
surface temperature (Group III).
For equipment where separate certificates have been prepared, with one for the electrical
parts, and one for the non-electrical parts, it is appropriate to have separate electrical and
non-electrical marking strings, each with its own associated certificate number.
NOTE Additional guidance on the marking of assemblies is given in IEC TS 60079-46.

 IEC 2019
COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
____
...

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