1 Scope
This standard specifies the safety requirements for selection, installation, use and maintenance as well as inspection procedure of electrical apparatus in explosive gas or combustible dust atmosphere.
This standard is not applicable to the following atmospheres:
——Underground mines;
——Explosive manufacturing and processing sites;
——Treatment rooms.
2 Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, the parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards. For undated references, the latest edition of the normative document referred to applies.
Contents
1 Scope
2 Normative References
3 Terms and Definitions
4 Grading and Grouping for Explosive Substances and Classification, Grading and Area Scope Division for Explosion-Hazardous Areas
5 Selection of Explosionproof Electrical Apparatus in Explosion-Hazardous Areas
6 Installations of Electric Circuits and Explosionproof Electrical Apparatus in Explosion-Hazardous Areas
7 Inspection and Maintenance of Explosionproof Electrical Apparatus in Hazardous Areas
Appendix A (Normative) Inspection Procedure
Appendix B (Informative) Grading and Grouping Illustration for Gas or Vapor Explosive Mixture
Appendix C (Normative) Combustible Dust Area Classification
Appendix D (Normative) Electric Clearance and Creepage Distance
Appendix E (Informative) Illustration for Wire Arrangement
