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What are Class I Division 2 Compliant Exit Signs? 
These type of Exit Signs has been designed specifically for installation in hazardous  and industrial environments.

Hazardous Location Exit Signs Explained  
The combination of fire or combustion triangle is used to identify Extreme Hazardous environments in the Explosion proof industry .  A source of fuel gases,liquids, or vapors, and or a source of ignition such as spark, fire or an explosion and oxygen must be present in the appropriate consistencies for an explosion to occur. At ESW our Explosion-Proof Enclosures & Systems operate to prevent these three criteria from coming into contact with one another in such a way that would potentially generate an explosion and be hazardous to the surrounding environment Such as an Oil refinery, Paint Booth, Naval Vessels 
Class 1 Exit Signs Explained 

 

Class I environments consist of areas where liquids, gases and vapor maybe present that have the potential to become flammable or combustible  There are two different sub divisions that exist in Class I  Division 1 and Division 2, along with three Zones; Zone 0, 1 & 2.  
Hazardous locations = Class I include Oil Refineries, Fuel Service, Gasoline Storage, Paint Spray Finishing Areas, Dry Cleaning Plants

 

Division 1 is a subset of Class I and is classified as a location where the explosive or flammable vapors, gases  or liquids mentioned above can exist under standard everyday operating conditions.

 

Division 2 is also a subset of Class I and is classified as a location where the explosive or flammable vapors, gases or liquids mentioned above are unlikely to exist during regular operation.

 

Zone 0 is identified as the presence of explosive or flammable gases, liquids or vapors for long periods of time during operating conditions or during a large portion of the operating conditions.

 

Zone 1 is identified as the presence of explosive or flammable gases, vapors or liquids for some of the time during normal operating conditions.

 

Zone 2 is identified as there not being a likelihood of explosive or flammable gases, vapors or liquids present during normal operating conditions.
CLASS II Exit Signs Explained
Class II environments consist of locations where combustible dusts or particles may exist that have the potential to become flammable or ignitable. Flour, Feed mills, Grain elevators, Metal Manufacturers, and Coal plants would be considered to be Class II environments 
Division 1 is a subset of Class II and is classified as an area where the flammable or explosive combustible dusts mentioned above can exist under normal, everyday operating conditions.
Division 2 is also a subset of Class II and is classified as an area where the flammable or explosive combustible dusts mentioned above are not likely to exist during regular operation.
CLASS III Exit Signs Explained
Class III environments consist of locations where airborne fibers may exist that have the potential to become flammable or ignitable. Areas that would be considered to be Class III include , Cotton Seed Mills, Sawdust mills or flyings plants,Textile mills, Cotton Gins

 

Division 1 is a subset of Class III and is classified as an area or location where ignitable fibers or flyings may be manufactured and or Stored 

Division 2 is also a subset of Class III and is classified as an area location where ignitable fibers or flyings may be Housed 
NEMA & Natinal Electrical code ENCLOSURE Harsh Enviorment Exit Signs Explained 
TYPE 3 - Type 3 enclosures/housings are intended for outdoor/wet Area use primarily to provide a degree of protection against wind blown dust, rain, sleet and external ice formation.

 

TYPE 3R - Type 3R enclosures/housings are intended for outdoor/Wet Area use primarily to provide a degree of protection against falling rain and external ice formations

TYPE 4 - Type 4 enclosures/housings are intended for interior or outdoor/ wet area use primarily to provide a degree of protection against wind blown rain, dust, splashing water, hose directed water, and external ice formation

TYPE 4X - Type 4X enclosures/housing are intended for indoor and outdoor use primarily to provide a degree of protection against corrosion, wind blown dust and rain, splashing water, full hose directed water and external ice formation.

TYPE 4/7 - Type 4/7 enclosures/housings are for use outdoors in locations classified to be hazardous as detailed in the NEC. 

TYPE 7 - Type 7 enclosures/housings are for use indoors in locations classified Class I, Div. 1 & 2, Groups A, B, C & D, as defined in the National Electric Code.

 

TYPE 9 - Type 9 enclosures/housings are for use in indoor locations classified Class II, groups E, F or G as detailed in the NEC

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