
TABLE 9.9 USA and Canada Class I combustible gas and vapor equipment protection techniquesdcont’d
Protection
technique/
Marking
Suitable hazardous
(classified) area
locations Standard No. Title
Increased Safety
AEx e Class I, Zone 1 ANSI/ISA-60079-7
(12.16.01)
Electrical Apparatus for Use in Class
I, Zone 1 Hazardous (Classified)
Locations: Type of Protection –
Increased Safety ‘‘e’’
AEx e Class I, Zone 1 ANSI/UL60079-7 Explosive Atmospheres – Part 7:
Equipment protection by increased
safety ‘‘e’’
Ex e Class I, Zone 1 CAN/CSA E60079-7 Electrical Apparatus for Explosive
Gas Atmospheres – Part 7: Increased
Safety ‘‘e’’
Powder Filling
AEx q Class I, Zone 1 ANSI/ISA-60079-5 ...