CEI EN 50394-1 : 2005

Introduction
1 Scope
2 Normative references
3 Definitions
4 Categories of intrinsically safe electrical systems (in
   accordance with EN 50014)
5 Interconnecting wiring/cables used in an intrinsically safe
   electrical system
6 Accessories for intrinsically safe electrical systems
7 Type tests and assessment
8 Marking of intrinsically safe electrical systems
9 Descriptive system document
10 Instructions
Annex A (normative) - Requirements for cables
Annex B (informative) - Typical descriptive system drawing
Annex C (normative) - Assessment of a simple intrinsically safe
        system
Annex D (normative) - Assessment of circuits with more than
        one linear source of power
Annex E (normative) - Trapezoidal power supplies
Annex F (normative) - Non-linear power supplies
Annex G (normative) - Verification of inductive parameters

Describes the requirements for construction and testing of GROUP 1 intrinsically safe electrical systems intended for use, as a whole or in part, in atmospheres susceptible to firedamp.