GE EVT-Pro 2.0, Operation And Technical Manual, Page: 59 / 60

Hazardous Area Classifications and
Protections (USA NEC Code ref.)

Class — The Class defines the general nature of the hazardous
material

Class I — Locations in which flammable gases or vapors may or may
not be in sufficient quantities to produce explosive or ignitable
mixtures.

Class II — Locations in which combustible dusts (either in suspension,
intermittently, or periodically) may or may not be in sufficient
quantities

Class III — Locations in which ignitable fibers may or may not be in
sufficient quantities to produce explosive or ignitable mixtures .

Division — The Division defines the probability of the
hazardous material being able to produce an explosive or
ignitable mixture based upon its presence.

Division 1 indicates that the hazardous material has a high
probability of producing an explosive or ignitable mixture due to it
being present continuously, intermittently, or periodically or from
the equipment itself under normal operating conditions.

Division 2 indicates that the hazardous material has a low
probability of producing an explosive or ignitable mixture and is
present only during abnormal conditions for a short period of time.

Group — The Group defines the type of hazardous material in
the surrounding atmosphere. Groups A-G (consult Hazardous
Environment classes separately)

Group D — Atmospheres containing a flammable gas, flammable
liquid-produced vapor, or combustible liquid-produced vapor
whose MESG is greater than 0.75 mm or MIC ration is greater than
0.80. Typical gases include acetone, ammonia, benzene, butane,
ethanol, gasoline, methane, natural gas, naphtha, and propane.

The EVT PRO 2.0 “X”
®
model for CSA is certified to
Class I, Division 2, Group D environments.
Appropriate engineering practices shall be applied when in hazardous
environments to include Always consult local authorities and plant
engineering to ensure compliance.