NBN EN 60079-25 : 2011

1 Scope
2 Normative references
3 Definitions
4 Descriptive system document
5 Grouping and classification
6 System categories
   6.1 General
   6.2 Category "ia"
   6.3 Category "ib"
7 Ambient temperature rating
8 Field wiring
9 Earthing and bonding of intrinsically safe systems
10 Protection against lightning and other electrical
   surges
11 Assessment of an intrinsically safe system
   11.1 General
   11.2 Analysis of inductive circuits
   11.3 Failures in field wiring
   11.4 Type verifications and type tests
12 Marking
Annex A (normative) 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 ZA (normative) Normative references to international
         publications with their corresponding European
         publications
Figures
Tables

Descrive requisiti per costruzione e valutazione di Sistemi elettrici intrinsecamente sicuri, tipo di protezione "i," ha destinato a uso, in generale o in parte, in esplosivo Atmosfere in Gruppo posizioni II.