NEMA 4/4X & 12 - Water/Corrosion Resistant & Dust Tight Pushbutton Fixtures
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NEMA 1 - Vandal Proof Fixtures
NEMA 7/9 & 4X C1&2,D1&2 Explosion Proof Fixtures
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| CJA Hazardous Location Fixtures - Three Different Models To Choose From |
 Elevator Systems Everywhere
Buildings all over the world need elevator equipment designed to protect against and prevent an explosion from occurring. CJA equipment can be found on elevators everywhere, from the largest cities in the world, to the smallest towns in the USA. Some buildings, cities and industries request our equipment because of its dependability and ease of installation. CJA equipment is used exclusively in many industries. The following are just a few of them. Grain Elevators Oil Refineries Coker Plants Pharmaceutical Plants Gas Utility Facilities Water Treatment Plants Flour and Feed Mills Passenger & Freight Elevators Coal Preparation Plants Mines Starch, Aluminum, Sulfur, Propane, Magnesium, etc. Processing Plants The listed locations above are just a few of the many that require explosion proof protection. Click this link to download the Hazardous Location Fixture Section of our Master Catalog. Please note that this is a large file and that Adobe Acrobat is required in order to view. A free download can be found at www.adobe.com. |
| Hazardous Location Classifications |
| Elevator Equipment
The following is an overview of hazardous location classifications as they apply to elevator equipment. This is intended to give elevator sales, technical and field personnel a better understanding of the hazardous location designations and the equipment available to meet these requirements. The actual processes employed to define and assign hazardous location designations are complex and beyond the scope of this summary. For complete detail and installation instructions see Article 500 of the National Electrical Code. General Hazardous location elevator equipment is necessary in any area where the possibility of fire or explosion exists, or may exist because of flammable gases or vapors, flammable liquids, combustible dust, or ignitable fibers. These types of dangers are officially classified by location (Class, Division, and Group) depending on the properties of the flammable vapors, liquids or gases, combustible dusts or fibers that may be present and/or the likelihood that a flammable or combustible concentration or quantity is present. From an elevator contractor perspective it is safe to say that if there is any likelihood that a fire or explosion could conceivably happen, hazardous location equipment should be installed, even if not specified by the customer. Class I Area Classification Areas in which flammable gases or vapors are or may be present in the air in quantities sufficient to produce explosive or ignitable mixtures are Class I. Group A, B, C & D - Defines the type of combustible gases in the Class I location atmosphere. Class I Area Groups: Division 1 and 2 A (acetylene) B (hydrogen) C (ethylene) D (propane) Class II Area Classification Areas where combustible metal, carbonaceous dust, or other combustible dust such as flour, grain, wood, etc., are or may be present in the air in quantities sufficient to produce explosive or ignitable mixtures are Class II. Group E, F, & G - Defines the type of combustible dust in the Class II location atmosphere. Class II Area Groups Division 1 & 2 E (metals - Div. 1 only) F (coal) G (grain) Class III Area Classification Areas that are hazardous because of the presence of easily ignitable fibers or flyings, but are not likely to be in suspension in the air in quantities sufficient to produce ignitable mixtures are Class III. Class III Groups Division 1 & 2 None. Division 1 Area Classification A Division 1 location is one in which the ignitable or combustible gases, vapors or dust can exist under normal operating conditions. Division 2 Area Classification A Division 2 location is one in which the ignitable or combustible gases, vapors or dust are stored, handled, processed or used, but normally confined within closed containers or systems, or dispersed by positive mechanical ventilation. In this division the hazard is created by accidental rupture of containers or systems, or equipment failure. NEMA Classifications Hazardous location enclosures are rated based on the Class and Group to which they will be installed. These are: NEMA 7 - Enclosures for use in locations classified as Class I, Groups A, B, C, or D. (Combustible gases) NEMA 9 - Enclosures for use in locations classified as Class II, Groups E, F, or G. (Combustible dust). NEMA 4X - Enclosures for use in Class 1, Division 2 locations if used in conjunction with hermetically sealed contacts. Water/Corrosion Resistant Enclosures are constructed to provide a degree of protection against falling dirt, rain, sleet, snow, windblown dust, splashing water and corrosion. Summary & Recommendations To summarize these hazardous location classifications for elevator applications: (1) the Class and Group designation specifies if the exposure is gaseous or combustible dust and (2) the Division specifies if the hazard is always present or exists only when a problem occurs. Because the Class I or II, Division 1 category indicates that the hazard exists under normal conditions it is our recommendation that elevator components used have a NEMA 7 or 9 rated enclosure. This is the most stringent application. In Class I or II, Division 2 areas exceptions to the enclosure rating are allowed. For elevator applications in Division 2, general purpose enclosures are permissible if used in conjunction with hermetically sealed contacts. For maximum protection the general purpose enclosure should be NEMA 4X rated. |
Make Sure Your Elevator Is Covered
 The Complete Elevator System
When determining what requires explosion proof protection make sure all the parts of the elevator are covered. Whether its a passenger or freight, there are many areas of the elevator that require explosion proof protection. CJA offers the following for your hazardous location protection needs: Machine Room Elevator Control Systems For Any Speed, Type or Elevator Application Motors: Any Horsepower/Voltage Handset Telephones Machine Room Lighting Brake Limit Switches - Manual Reset Top Of Hoistway Final, Normal & Slow Down Switches Access Over Travel Limit Switch Inside Elevator Main & Auxiliary Car Stations For both Passenger and Freight Applications Car Position Indicators - Digital/Multilight Traveling Lanterns - Vandal Proof Cab Lighting Outside Mounted On Elevator Car Top Inspection Station w/Worklight & Receptacle Magna-Track Selector System Car Bottom Worklight & Receptacle Retiring Cam Cab Ventilation Fan Elevator Entrance/Hallway Door Interlocks Hall Stations - Loaded with Features Multi Light Position Indicators Hall Lanterns Access Switch Stations Elevator Pit/Bottom of Hoistway Final, Normal & Slow Down Switches Pit Switch Pit Worklight and GFCI Receptacle If you dont see what you need listed here please call us at 800-252-1910. If we cant help you no one can. |
