IEC 61241-1-2:1999

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Definitions
4 Area classification
5 Practices A and B
   5.1 Practice A
   5.2 Practice B
6 Selection according to temperature
   6.1 Temperature limitation
   6.2 Maximum permissible surface temperature
7 Selection of apparatus
   7.1 Selection of practice A dust ignition protected
        apparatus
   7.2 Selection of practice B dust ignition protected
        apparatus
   7.3 Selection of radiating equipment
   7.4 Selection of ultrasonic equipment
8 Installation
9 Wiring systems
10 Inspection and maintenance
Annex A (informative) Examples of dust layers of excessive
        thickness

Gives guidance on the selection, installation and maintenance of electrical apparatus protected by enclosures and surface temperature limitation for use in areas where combustible dust may be present in quantities which could lead to a fire or explosion hazard.Note - IEC 61241-1-1 specifies requirements for the design, construction and testing of electrical apparatus. Apparatus within the scope of this standard may also be subject to additional requirements in other standards - for example IEC 60079-0.