BS EN 60079-25:2010

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
Annex ZA (normative) - Normative references to international
         publications with their corresponding European
         publications
Annex ZZ (informative) - Coverage of essential requirements of the
         directive 94/9/EC

Provides 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.