| HAZARDOUS AREA ELECTRICAL GUIDELINES |
| |
SUBSTANCE |
TYPICAL
ENVIRONMENTS
|
CLASSIFICATION |
VOLATILITY |
| CLASS 1 |
Flammable Gases,
Vapors or Liquids
(Acetylene, Hydrogen,
Ethylene, Propane) |
– Oil Refinery –
– Paint Warehouse –
– Offshore Oil Rig –
– Spray Booth –
|
Division 1
(Hazard Likely)
|
MOST

LEAST |
Division 2
(Hazard Not Likely) |
| CLASS 2 |
Combustible Dusts
(Metals [Div.1 only], Coal, Grain) |
– Coal Mine –
– Grain Silo –
– Munitions Factory –
– Hay Storage Facility – |
Division 1
(Hazard Likely) |
Division 2
(Hazard Not Likely) |
| CLASS 3 |
Ignitable Fibers & Flyings
(Machined Magnesium) |
– Paper Mill –
– Woodworking Facility –
– Textile Mill –
– Cotton Gin – |
Division 1
(Hazard Likely) |
Division 2
(Hazard Not Likely) |