IEC 60079-0:2004/ISH1:2008

Interpretation sheet 1 - Electrical apparatus for explosive gas atmospheres - Part 0: General requirements

Feuille d'interprétation 1 - Matériel électrique pour atmosphères explosives gazeuses - Partie 0: Règles générales

General Information

• Status: Published
• Publication Date: 26-Nov-2008
• ICS: 29.260.20 - Electrical apparatus for explosive atmospheres
• Technical Committee: TC 31 - Equipment for explosive atmospheres
• Current Stage: PPUB - Publication issued
• Start Date: 31-Jan-2009
• Completion Date: 27-Nov-2008

Relations

• Revises: IEC 60079-0:2004 - Electrical apparatus for explosive gas atmospheres - Part 0: General requirements
• Effective Date: 05-Sep-2023
• Revised: IEC 60079-0:2007 - Explosive atmospheres - Part 0: Equipment - General requirements
• Effective Date: 05-Sep-2023

Standards Content (Sample)

TC 31/Publication 60079-0 (2004), Fourth edition/I-SH 01

ELECTRICAL APPARATUS FOR EXPLOSIVE

GAS ATMOSPHERES –
Part 0: General requirements
INTERPRETATION SHEET
This interpretation sheet has been prepared by committee 31: Equipment for explosive

atmospheres, of the IEC.
The text of this interpretation sheet is based on the following documents:
ISH Report on voting
31/767/ISH 31/778/RVD
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.
___________
Subclauses 26.8 and 26.9 of IEC 60079-0 (2004)
Following the discussions by the TC 31/WG 22 Task Group addressing the repeatability of the
thermal endurance to heat and thermal endurance to cold tests it was proposed that a
tolerance be clarified for the test periods in Edition 6, 31/743/DC was issued and comments
received and resolved as 31/751A/INF.
These interpretations are made available for edition 4 of this standard due to the current use
of that standard by manufacturers, conformity assessment schemes and national bodies by
means of this “Interpretation Sheet” as follows:
Details of interpretation:
Interpretation of subclause 26.8 Thermal endurance to heat and 26.9 Thermal endurance
to cold of IEC 60079-0 (2004)
Question: As it is unreasonable to consider them to be the exact test time, are the time
frames for the 24 h, 336 h (2 weeks) or 672 h (4 weeks) tests considered to be the minimum
times? If so, what is the maximum time?
Interpretation: The 24 h, 336 h and 672 h values are considered the minimum number of
+2
hours for each of the tests. It is practical that the time periods should not extend beyond 24
+30 +30
h, 336 h, 672 h.
0 0
It is intended that this interpretation will be introduced in IEC 60079-0 Edition 6 and therefore
an Interpretation Sheet will not be required for this or future editions.

November 2008 ICS 29.260.20 French text overleaf

CE 31/Publication 60079-0 (2004), Quatrième édition/I-SH 01

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