IEC 61241-14:2004

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 General requirements for all types of protection
   4.1 Access for inspection
   4.2 Associated equipment located in non-hazardous areas
   4.3 Segregation
   4.4 Electrical rating
   4.5 Protection from mechanical damage and environmental
         injury
   4.6 Documentation
   4.7 Qualifications of personnel
   4.8 Additional considerations
   4.9 Prevention of explosion
5 Area classification
6 Selection of electrical apparatus
   6.1 Permitted apparatus
   6.2 Selection according to dust characteristics and zones
   6.3 Selection according to temperature
   6.4 Selection of apparatus
7 Protection from dangerous (incendive) sparking
   7.1 Danger from live parts
   7.2 Danger from exposed and extraneous conductive parts
   7.3 Potential equalization
   7.4 Static electricity
   7.5 Electromagnetic radiation
   7.6 Lightning protection
   7.7 Cathodically protected metallic parts
8 Electrical protection
   8.1 General
   8.2 Location of protection and control equipment
   8.3 Resetting of short-circuit and earth-fault protection
         devices
   8.4 Protection of rotating electrical machinery
   8.5 Loss of supply phase
   8.6 Transformer protection
9 Emergency switch-off and electrical isolation
   9.1 Emergency switch-off
   9.2 Electrical isolation
10 Wiring systems
   10.1 General
   10.2 Entries for cable and conduit
   10.3 Accessories
   10.4 Course of wiring
   10.5 Barriers
   10.6 Flexible connection
   10.7 Cable entries
   10.8 Unauthorized methods
   10.9 Telecommunications circuits
   10.10 Unused openings
11 Plugs and socket outlets
   11.1 General
   11.2 Mounting
   11.3 Location
12 Additional requirements for type of protection "Ex tD"
   12.1 Practices A and B
   12.2 Practice A
   12.3 Practice B
   12.4 Motors supplied at varying frequency and voltages
13 Additional requirements for type of protection "pD"
   13.1 Sources of protective gas
   13.2 Automatic switch-off
   13.3 Alarm
   13.4 Common source of protective gas
   13.5 Switching on electrical supply
   13.6 Motors supplied at varying frequency and voltages
14 Additional requirements for type of protection "iD"
15 Additional requirements for type of protection "mD"
16 Inspection of installation
   16.1 General
   16.2 Testing
Annex A (informative) Examples of dust layers of excessive
                      thickness
Annex B (normative) Frictional sparking risks with light
                      metals and their alloys
Bibliography

Specifies general requirements, additional to those required for basic electrical safety, for the selection of electrical apparatus and instruments and associated equipment, and for the installation of electrical apparatus to ensure safe use in areas where combustible dust may be present in quantities which could lead to a fire or explosion hazard.The application of electrical apparatus in atmospheres which may contain explosive gas as well as combustible dust, whether simultaneously or separately, requires additional protective measures.