3500 Flat Panel Industrial PCs
60
Division 2 Locations
Division 2 locations are listed below:
• Class I volatile flammable liquids or flammable gasses are handled, processed, or
used, but confined within closed containers or closed systems from which they can
escape only in cases of accidental rupture or breakdown of such enclosures or
systems, or in case of abnormal operation of equipment.
• Ignitable concentrations of Class I vapors or gasses are normally prevented by
positive mechanical ventilation, but which may become hazardous due to mechanical
failure of those ventilation systems.
• Location is adjacent to a Division 1 location.
• Class II combustible dust is not normally in the air in quantities sufficient to produce
explosive or ignitable mixtures. Dust accumulations are normally insufficient to
interfere with normal operation of electrical equipment or other apparatus.
Combustible dust may be in suspension in the air as a result of the following:
malfunctioning of handling or processing equipment; combustible dust
accumulations on, or in the vicinity of electrical equipment; may be ignitable by
abnormal operation or failure of electrical equipment.
Hazardous Locations Group Ratings
All electrical equipment that is approved for use in hazardous locations must include
a group rating. Various flammable and combustible substances are divided into these
groups as a function of their individual maximum experimental safe gap (MESG),
explosion pressure, and ignition temperature.
Component temperatures and the potential for spark based upon voltage, current, and
circuit characteristics, within electrical equipment, will determine what the
equipment group rating will be. A device approved for installation within Class I,
Group A locations may also be used in Groups B, C, or D.
Note
Approved Class I equipment may not be suitable for Class II installations. Class I
includes Groups A, B, C, and D. Class II includes Groups F, and G.
Enclosures
The systems are designed for installation within a clean and dry enclosure for both
ordinary and hazardous locations. The front panel meets the requirements of UL and
CSA Type 4, 4X, and 12 enclosures. The enclosure used for Class I hazardous
locations should have a minimum rating of Type 12 (NEMA 12, IP 5X). However,
Type 4 (IP 6X) enclosures are strongly recommended.
Warning
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