This part of GB 3836 is intended to be applied by users, and covers factors directly related to the inspection and maintenance of electrical installations within hazardous areas only. It does not include conventional requirements for electrical installations, nor the testing and certification of electrical apparatus.
It does not cover Group I apparatus (applications for mines susceptible to firedamp).
This standard supplements the requirements laid down in GB 16895.23-2005.
1 Scope
2 Normative References
3 Terms and Definitions
4 General Requirements
4.1 Documentation
4.2 Qualifications of Personnel
4.3 Inspections
4.4 Regular Inspections
4.5 Continuous Supervision by Skilled Persons
4.6 Maintenance Requirements
4.7 Environmental Conditions
4.8 Isolation of Apparatus
4.9 Earthing and Equipotential Bonding
4.10 Conditions of Use
4.11 Movable Apparatus and Its Connections
4.12 Inspection Schedules
5 Additional Inspection Schedule Requirements
5.1 Type of Protection “d” - Flameproof Enclosure
5.2 Type of Protection “e” - Increased Safety
5.3 Type of Protection “i” - Intrinsic Safety
5.4 Type of Protection “p” - Pressurized Enclosure
5.5 Apparatus Used in Zone
5.6 Types of Protection “m” (encapsulation), “o” (oil-immersion) and “q” (Powder-filling)
Appendix A (Informative) Typical Inspection Procedure for Periodic Inspections (See Section 4.4)
Figure A. 1 Typical Inspection Procedure for Periodic Inspections
Table 1 Inspection Schedule for Ex “d”, Ex “e” and Ex “n” Installations
Table 2 Inspection Schedule for Ex “i” Installations
Table 3 Inspection Schedule for Ex “p” Installations
Table B. 1 Minimum Distance between Gas- and Vapor- graded Flameproof Enclosure Joint and Obstruction
