NEN EN 50303 : 2000
Current
The latest, up-to-date edition.
GROUP 1, CATEGORY M1, EQUIPMENT INTENDED TO REMAIN FUNCTIONAL IN ATMOSPHERES ENDANGERED BY FIREDAMP AND/OR COAL DUST
01-12-2013
Foreword
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
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