This part of IEC 60079 contains the specific requirements for the construction and testing of
electrical apparatus with pressurized enclosures, of type of protection “p”, intended for use in
explosive gas atmospheres. It specifies requirements for pressurized enclosures containing a
limited release of a flammable substance.
This standard supplements and modifies the general requirements of IEC 60079-0. Where a
requirement of this standard conflicts with a requirement of IEC 60079-0, the requirements of
this standard takes precedence.
This standard does not contain the requirements for:
• pressurized enclosures where the containment system may release
a) air with an oxygen content greater than normal, or
b) oxygen in combination with inert gas in a proportion greater than 21 %;
• pressurized rooms or analyser houses; see IEC 60079-13 and IEC 60079-16.
NOTE 1 Due to the safety factors incorporated in the type of protection, the uncertainty of measurement inherent
in good quality, regularly calibrated measurement equipment is considered to have no significant detrimental effect
and need not be taken into account when making the measurements necessary to verify compliance of the
equipment with the requirements of this standard.
NOTE 2 When the user acts in the role of the manufacturer, it is typically the user’s responsibility to ensure that
all relevant parts of this standard are applied to the manufacturing and testing of the equipment.
NOTE 3 Types of protection “px” and “py”provide Equipment Protection Levels (EPL) Mb or Gb. Type of protection
“pz” provides Equipment Protection Level (EPL) Gc. For further information, see Annex H.
BS EN 60079-2:2007 Referenced Document
94/9/EC GUIDELINES ON THE APPLICATION OF DIRECTIVE 94/9/EC OF THE EUROPEAN PARLIAMENT AND THE COUNCIL OF 23 MARCH 1994 ON THE APPROXIMATION OF THE LAWS OF THE MEMBER STATES CONCERNING EQUIPMENT AND PROTECTIVE SYSTEMS INTENDED FOR USE IN POTENTIALLY EXPLOSIVE ATMO*， 2012-09-01 Update
EN 60051 Direct Acting Indicating Analogue Electrical Measuring Instruments and Their Accessories Part 9: Recommended Test Methods
EN 60112:2003 Method for the determination of the proof and the comparative tracking indices of solid insulating materials (Incorporating Corrigendum June 2003)
EN 60529:1991 Degrees of Protection Provided by Enclosures (IP Code) (Incorporates Amendments A1: 2000 and A2: 2013)
EN 60664-1:2003 Insulation coordination for equipment within low-voltage systems Part 1: Principles@ requirements and tests
IEC 60051 Corrigendum 1 - Recommendations for direct acting indicating electrical measuring instruments and their accessories
IEC 60079-1 Interpretation sheet 1 - Explosive atmospheres - Part 1: Equipment protection by flameproof enclosures "d"*， 2020-05-28 Update
IEC 60079-5 Amendment 1 - Explosive atmospheres - Part 5: Equipment protection by powder filling "q"*， 2022-05-12 Update
IEC 60079-6 Explosive atmospheres - Part 6: Equipment protection by liquid immersion "o" CONSOLIDATED EDITION*， 2020-02-24 Update
IEC 60079-7 Atmosphères explosives – Partie 7: Protection du matériel par sécurité augmentée ?e? (Edition 5.1; Consolidated Reprint)*， 2017-08-01 Update
BS EN 60079-2:2007 history
0000 BS EN 60079-2:2014(2015)
2015BS EN 60079-2:2014 Explosive atmospheres. Equipment protection by pressurized enclosure "p"
2008BS EN 60079-2:2007 Explosive atmospheres - Part 2: Equipment protection by pressurized enclosure "p"
2004BS EN 60079-2:2004 Electrical apparatus for explosive gas atmospheres - Pressurized enclosures "p"
2002BS EN 50016:2002 Electrical apparatus for potentially explosive atmospheres - Pressurized apparatus "p"