| 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) |