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IEC

IEC 60079-1:2014/ISH1:2020

(Main)

Interpretation sheet 1 - Explosive atmospheres - Part 1: Equipment protection by flameproof enclosures "d"

Interpretation sheet 1 - Explosive atmospheres - Part 1: Equipment protection by flameproof enclosures "d"

General Information

Status
Published
Publication Date
27-May-2020
ICS
29.260.20 - Electrical apparatus for explosive atmospheres
Technical Committee
TC 31 - Equipment for explosive atmospheres
Current Stage
PPUB - Publication issued
Start Date
26-Jun-2020
Completion Date
28-May-2020
Ref Project

Relations

Revised
IEC 60079-1:2014 - Explosive atmospheres - Part 1: Equipment protection by flameproof enclosures "d"
Effective Date
05-Sep-2023

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IEC 60079-1:2014/ISH1:2020 - Interpretation sheet 1 - Explosive atmospheres - Part 1: Equipment protection by flameproof enclosures "d" Released:5/28/2020IEC 60079-1:2014/ISH1:2020 - Interpretation sheet 1 - Explosive atmospheres - Part 1: Equipment protection by flameproof enclosures "d" Released:5/28/2020
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IEC 60079-1:2014/ISH1:2020 - Interpretation sheet 1 - Explosive atmospheres - Part 1: Equipment protection by flameproof enclosures "d" Released:5/28/2020
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Standards Content (Sample)


 IEC 2020
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
IEC 60079-1
Edition 7.0  2014-06
EXPLOSIVE ATMOSPHERES –
Part 1: Equipment protection by flameproof enclosures "d"

INTERPRETATION SHEET 1
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
31/1536/DISH 31/1542/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.

___________
IEC 60079-1:2014 Edition 7.0, Explosive atmospheres – Part 1: Equipment protection by
flameproof enclosures "d"
Question 1:
The requirements given in 13.1 of IEC 60079-1:2014 (Edition 7) restrict threaded entries for
flameproof enclosures to only metric and NPT. Does this restriction represent a major
technical change between IEC 60079-1:2014 (Edition 7) and IEC 60079-1:2007 (Edition 6)?
Answer 1:
Yes, the restriction to only metric and NPT regarding threaded entries for flameproof
enclosures does represent a major technical change between IEC 60079-1:2014 (Edition 7)
and IEC 60079-1:2007 (Edition 6). The requirements given in Clause 13 of IEC 60079-1:2007
(Edition 6) had no such normative restriction, with reference to metric and NPT only as
examples of threaded entries for flameproof enclosures.
ICS 29.260.20
IEC 60079-1:2014-06/ISH1:2020-06(en)

– 2 – IEC 60079-1:2014/ISH1:2020
 IEC 2020
While IEC 60079-1:2014 (Edition 7) only permits the use of metric and NPT threads for entry
into flameproof enclosures, cable glands/conduit entry devices, thread adapters and blanking
elements are permitted to use other thread forms (see Annex C of IEC 60079-1:2014
(Edition 7)).
NOTE 1 The intention of the restriction to only metric and NP
...

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