Telephones - Theovine

Hazardous and Classified Locations
Hazardous and classified locations are essentially the same. They can be
defined as locations where fire or explosion hazards may exist due to the
presence of flammable gases or vapors, flammable liquids, combustible dusts
and ignitable fibres or flyings.
When an area is “classified” hazardous gases, vapors or dust have been
identified and put in a specific Class, Division / (IEC) Zone and Group.
Once classified, only industrial telephone communications equipment which
is approved for that Class, Division and Group can be installed and used.
Identifying NEC® Hazardous Locations — Class, Division / (IEC) Zone and Group
The information presented in this section is for general reference purposes only. All applicable local and national regulations
and practices concerning Explosion Proof and Hazardous Area communications equipment must be strictly followed and
adhered to. For detailed information refer to published documents on hazardous location definitions and installation
requirements presented by 1) NEC®, 2) CEC Canadian Electrical Code, 3) IEC.
Areas where there is a
danger of explosion due to
the presence of Flammable
Vapors, Gases or Liquids
Typical Applications
Chemical Plants
Refi neries
Aerospace Sites
Bulk Loading Stations
Mines
Munitions Storage Areas
Offshore Platforms
Nuclear Facilities
Power Generation Facilities
and more …
Areas where there is
a danger of explosion
due to the presence of
Flammable Dust
Typical Applications
Land Based Drilling Rigs
Grain Storage Processing
Coal Handling Storage
Metal Grinding and Working
Pharmaceutical Plants
and more …
Areas where there is
a danger of explosion
due to the presence of
Fibers & Flyings
Typical Applications
Textile
Mattress
Clothing
Cotton Mills
Wool Processing
Wood Cutting, Pulverizing
and more …
A-14
Guardian Telecom Product & Services Guide PSG6
www.guardiantelecom.com