Lightolier HSCXT Series Photometry, Typical Class I Locations, Class I, Division 2 Locations

Section 7/Folio Q10-33

	HAZARDLINE ENCLOSED INDUSTRIAL HSCXT SERIES
Page 2 of 4	CLASS I, DIVISION 2 LOCATIONS, GROUPS A,B,C,D; CLASS II, DIVISION I AND 2

GROUPS F AND G; CLASS III, DIVISION I, DIVISION 2 LOCATIONS, WET LOCATIONS

PHOTOMETRY

MODEL NO. HSCXT232

Typical Class I Locations:

•Petroleum refineries, and gasoline storage and dispensing areas.

•Industrial firms that use flammable liquids in dip tanks for parts cleaning or other operations.

•Petrochemical companies that manufacture chemicals from gas and oil.

•Dry cleaning plants where vapors from cleaning fluids can be present.

•Companies that have spraying areas where they coat products with liquid paint or plastics.

•Aircraft hangers and fuel servicing areas.

•Utility gas plants and operations involving storage and handling of liquefied petroleum gas or natural gas.

CLASS I, DIVISION 2 LOCATIONS

A Class I, Division 2 location is a location: (1) in which volatile flammable liquids or flammable gases are handled, processed, or used, but in which the liquids, vapors, or gases will normally be confined within closed containers or closed systems from which they can escape only in case of accidental rupture or break- down of such containers or systems, or in case of abnormal operation of equip- ment, or (2) in which concentrations of ignitible gases or vapors are normally prevented by positive mechanical ventilation, but which might become haz- ardous through failure or abnormal operation of the ventilating equipment; or (3) that is adjacent to a Class I, Division 1 location, and to which concentrations of ignitible gases or vapors might occasionally be communicated unless such com- munication is prevented by adequate positive-pressure ventilation from a source of clean air, and effective safeguards against ventilation failure are provided.

This classification usually includes locations where volatile flammable liquids or flammable gases or vapors are used, but which, in the judgment of the authority having jurisdiction, would become hazardous only in case of an accident or of some unusual operating condition, The quantity of hazardous material that might escape in case of accident, the adequacy of ventilating equipment, the total area involved, and the record of the industry or business with respect to explosions or fires are all factors that merit consideration in determining the classification and extent of each location.

Piping without valves, checks, meters, and similar devices would not ordinarily introduce a hazardous

condition even though used for flammable liquids or gases. Locations used for the storage of flammable

liquids or of liquefied or compressed gases in sealed containers would not nor- mally be considered hazardous unless subject to other hazardous conditions also.

Electrical conduits and their associated enclosures separated from process flu- ids by a single seal or barrier shall be classed as a Division 2 location if the out- side of the conduit and enclosures is an unclassified location.

TYPICAL CLASS III LOCATIONS

•Textile mills, cotton gins, cotton seed mills and flax processing plants.

•Any plant that shapes, pulverizes or cuts wood and creates sawdust or flyings.

Note: fibers and flyings are not likely to be suspended in the air, but can collect around machinery or on lighting fixtures and where heat, a spark or hot metal can ignite them.

TYPICAL CLASS II LOCATIONS

•Grain elevators, flour and feed mills.

•Plants that have chemical or metallurgical processes...producers of plastics, medicines and fireworks, etc.

•Producers of starch or candies.

•Spice-grinding plants, sugar plants and cocoa plants.

•Coal preparation plants and other carbon-handling or processing areas.

Job Information	Type:
Lightolier a Genlyte Thomas Company	www.lightolier.com

Technical Information: (978) 657-7600 • Fax (978) 658-0595

631 Airport Road, Fall River, MA 02720 • (508) 679-8131 • Fax (508) 674-4710 We reserve the right to change details of design, materials and finish.

© 2002 Genlyte Thomas Group LLC (Lightolier Division) A0902