Foreword
1 Scope
2 Normative References
3 Definitions
4 Grouping and classification of intrinsically safe
apparatus and associated apparatus
5 Categories of electrical apparatus
5.1 General
5.2 Category "ia"
5.3 Category "ib"
5.4 Simple apparatus
6 Apparatus construction
6.1 Enclosures
6.2 Wiring and small component temperatures
6.3 Facilities for connection of external circuits
6.4 Separation distances
6.5 Protection against polarity reversal
6.6 Earth (Ground) conductors, connections, and terminals
6.7 Encapsulation used for the exclusion of a potentially
explosive atmosphere
7 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 devices
8 Infallible components, infallible assemblies of
components and infallible connections
8.1 Mains transformers
8.2 Transformers other than mains transformers
8.3 Damping windings
8.4 Current limiting resistors
8.5 Blocking capacitors
8.6 Shunt safety assemblies
8.7 Wiring and connections
8.8 Galvanically separating components
9 Diode safety barriers
9.1 General
9.2 Construction
10 Type verifications and type tests
10.1 Spark-ignition test
10.2 Explosive test mixtures
10.3 Calibration of the spark-test apparatus
10.4 Tests with the spark-test apparatus
10.5 Temperature tests
10.6 Voltage tests
10.7 Small component ignition test
10.8 Determination of parameters of loosely specified
components
10.9 Tests for cells and batteries
10.10 Mechanical test
10.11 Tests for apparatus containing piezo-electric devices
10.12 Type tests for diode safety barriers and safety shunts
10.13 Cable pull test
10.14 Lamp Breakage Test
11 Routine verifications and tests
11.1 Routine tests for diode safety barriers
11.2 Routine test for mains transformers
12 Marking
12.1 General
12.2 Marking of connection facilities
12.3 Control drawings
13 Documentation
Annex A (normative) Assessment of intrinsically safe circuits
Annex B (normative) Spark-test apparatus for intrinsically
safe circuits
Annex C (informative) Measurement of creepage distances,
clearances, and separation distances
through casting compound and through
solid insulation
Annex D (normative) Encapsulation
Annex E (informative) U.S. National Deviations
Annex F (informative) Editorial Differences Between IEC 60079-11
and ANSI/ISA-12.02.01-2002 (IEC 60079-11 Mod)
Annex G (informative) National Differences Types