EX Truck FAQ
- Class I locations contain flammable gasses, vapors, and liquids
- Class II locations contain combustible dusts.
- Class III locations contain ignitable fibers and flyings
- Division 1 locations are locations in which the hazard is expected to be present in everyday production operations.
- Division 2 locations are locations in which the hazard is expected to be confined and will be present only through accidental rupture, breakage, or unusual faulty operation.
- Groups are based on ignition temperatures and explosion pressures. Class 1 locations have groups A, B, C, and D. Class II locations have groups E, F, and G. There are no groups for Class III locations.
- Section 4.1.1 – Locations shall be classified in accordance with NFPA 70.
- Section 4.1.2 – The location shall be classified prior to considering the use of industrial trucks therein, and the type of industrial truck required shall be as specified in section 4.2 for the given location.
- Section 4.1.4 – The authority having jurisdiction shall limit the use of industrial trucks in classified areas in plants or buildings according the hazard classification of each area.
The term “authority having jurisdiction” is used in NFPA documents in a broad manner, since jurisdictions and approval agencies vary, as do their responsibilities. The AHJ may be a federal, state, local or other regional department or individual such as a fire chief, fire marshal, labor department, building official, electrical inspector or others having statutory authority. In many circumstances, the property owner or his designated agent assumes the role of the authority having jurisdiction.
1-6.1 Class I, Division 1, Groups A,B,C. Powered-operated industrial trucks shall not be permitted to be used in such locations. For examples of chemicals whose vapors, if mixed in air, are classified as Class I, Groups A, B, or C, see Section 500-5 of NFPA 70, National Electric Code, and A-1-6.1 of this standard.
As a result, OSHA can accept products “properly certified” by the NRTL. “Properly certified” generally means:
The product is labeled or marked with the registered certification mark of the NRTL. The NRTL issues the certification for a product covered within the scope of a test standard for which OSHA has recognized it, and the NRTL issues the certification from one of its locations.
Factory Mutual Research Corporation (FMRC)
1151 Boston-Providence Turnpike
Norwood, Massachusetts 02062
Intertek Testing Services NA, Inc. (Formerly ETL)
3933 U.S. Route 11
Cortland, New York 13045
TUV Rheinland of North America, Inc.
12 Commerce Road
Newtown, Connecticut 06470
Underwriters Laboratories Inc.
333 Pfingsten Road
Northbrook, Illinois 60062
See the OSHA web pages for information on each NRTL’s scope of recognition, or contact OSHA at