ISA 12.02.01 : 2002

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

Gives the construction and testing of intrinsically safe apparatus, intended for use in potentially explosive atmospheres and for associated apparatus, which is intended for connection to intrinsically safe circuits which enter such atmospheres.