IEC 60079-25 : 2.0

FOREWORD
1 Scope
2 Normative references
3 Terms, definitions and abbreviations
4 Descriptive system document
5 Grouping and classification
6 Levels of protection
7 Ambient temperature rating
8 Interconnecting wiring/cables used in an intrinsically
   safe electrical system
9 Requirements of cables and multi-core cables
10 Termination of intrinsically safe circuits
11 Earthing and bonding of intrinsically safe systems
12 Protection against lightning and other electrical surges
13 Assessment of an intrinsically safe system
14 Marking
15 Predefined systems
Annex A (informative) - Assessment of a simple intrinsically
        safe system
Annex B (normative) - Assessment of circuits with more
        than one source of power
Annex C (informative) - Interconnection of non-linear and
        linear intrinsically safe circuits
Annex D (normative) - Verification of inductive parameters
Annex E (informative) - A possible format for descriptive
        systems drawings and installation drawings
Annex F (informative) - Surge protection of an intrinsically
        safe circuit
Annex G (normative) - Testing of cable electrical parameters
Annex H (informative) - Use of simple apparatus in systems
Annex I (normative) - FISCO systems
Bibliography

Describes the specific requirements for construction and assessment of intrinsically safe electrical systems, type of protection 'i', intended for use, as a whole or in part, in locations in which the use of Group I, II or III apparatus is required.