CEI EN 50303 : 2001

INTRODUCTION
1 SCOPE
2 NORMATIVE REFERENCES
3 DEFINITIONS
4 GENERAL
5 CATEGORY M1 EQUIPMENT HAVING THE REQUISITE LEVEL OF PROTECTION
   IN THE EVENT OF TWO FAULTS OCCURRING INDEPENDENTLY OF EACH OTHER
6 CATEGORY M1 EQUIPMENT HAVING THE REQUISITE LEVEL OF PROTECTION
   USING A SECOND INDEPENDENT MEANS
7 REQUIREMENTS FOR CATEGORY M1 FLAMMABLE GAS DETECTORS WITH HOT
   WIRE OR HOT PELLISTOR SENSING HEADS
8 REQUIREMENTS FOR CATEGORY M1 SYSTEMS
9 TYPE TESTING
10 MARKING REQUIREMENTS
11 INSTRUCTIONS

Defines the design, construction, testing and marking requirements for GROUP I, Category M1 equipment intended to remain functional in underground parts of mines, as well as those parts of surface installations of such mines endangered by firedamp and/or coal dust clouds under normal atmospheric conditions of pressures ranging from 0,8 bar to 1,1 bar and temperatures ranging from -20 degrees C to +60 degrees C.