Introduction1 Scope2 Normative references3 Terms and definitions4 Grouping and classification of intrinsically safe apparatus and associated apparatus5 Categories of electrical apparatus6 Apparatus construction 6.1 Enclosures 6.2 Temperatures of apparatus immersed in dust 6.3 Facilities for connection of external circuits 6.4 Separation distances 6.5 Protection against polarity reversal 6.6 Earth conductors, connections and terminals 6.7 Encapsulation used for exclusion of potentially explosive atmosphere7 Components on which intrinsic safety depends 7.1 Rating of components 7.2 Connectors for internal connections, plug-in cards and components 7.3 Fuses 7.4 Primary and secondary cells and batteries 7.5 Semiconductors 7.6 Failure of components and connections 7.7 Piezo-electric devices8 Infallible components, infallible assemblies of components and infallible connections9 Diode safety barriers10 Type verifications, assessments and type tests 10.1 Spark ignition assessment 10.2 Temperature tests 10.3 Voltage tests 10.4 Small component ignition test 10.5 Determination of parameters of loosely specified components 10.6 Tests for cells and batteries 10.7 Mechanical test 10.8 Tests for apparatus containing piezoelectric devices 10.9 Type tests for diode safety barriers and safety shunts 10.10 Cable pull test11 Routine verifications and tests12 Marking 12.1 General 12.2 Marking of connection facilities13 DocumentationAnnex A (normative) See Annex B of IEC 60079-11Annex B (informative) See Annex C of IEC 60079-11Annex C (normative) See Annex D of IEC 60079-11