Other U.S. hazardous locations certification requirements
The following is a list of U.S. hazardous locations documents (other than UL's) that serve as requirements for UL's hazardous locations investigations.
Other U.S. standards writing organizations such as IEEE, ISA, MSHA, NEMA, NFPA, and the U.S. Coast Guard have developed these requirements. UL staff assists these organizations in the development and maintenance of their respective requirements (such as through participation on technical committees).
Institute of Electrical and Electronics Engineers (IEEE)
| Standard | Title |
| IEEE 515 | Testing Design, Installation, and Maintenance of Electrical Resistance Heat Tracing for Industrial Applications |
ISA
| Standard | Title |
| ISA 12.01.01 | Definitions and Information Pertaining to Electrical Instruments in Hazardous (Classified) Locations |
| ISA 12.10.05 | Electrical Apparatus For Use In Zone 20, Zone 21 And Zone 22 Hazardous (Classified) Locations - Classification Of Zone 20, Zone 21 And Zone 22 Hazardous (Classified) Locations |
| ISA 12.12.01 | Nonincendive Electrical Equipment for use in Class I and II, Division 2 and Class III, Divisions 1 and 2 Hazardous (Classified) Locations |
| ISA 12.13.01 | Performance Requirements for Combustible Gas Detectors |
| ISA 12.13.04 | Performance Requirements for Open Path Combustible Gas Detectors |
| ISA 12.27.01 | Requirements For Process Sealing Between Electrical Systems And Flammable Or Combustible Process Fluids |
| ISA 92.00.01 | Performance Requirements for Toxic Gas Detectors |
| ISA 92.00.04 | Performance Requirements for Open Path Toxic Gas Detectors |
| ISA 60079-2 | Electrical Apparatus for Explosive Gas Atmospheres - Part 2: Pressurized Enclosures "p" |
| ISA 60079-26 | Electrical Apparatus For Use In Class I, Zone 0 Hazardous (Classified) Locations |
| ISA 60079-27 | Fieldbus Intrinsically Safe Concept (FISCO) And Fieldbus Non-Incendive Concept (FNICO) |
| ISA 61241-0 | Electrical Apparatus For Use In Zone 20, Zone 21 And Zone 22 Hazardous (Classified) Locations - General Requirements |
| ISA 61241-1 | Electrical Apparatus For Use In Zone 21 And Zone 22 Hazardous (Classified) Locations - Protection By Enclosures "tD" |
| ISA 61241-2 | Electrical Apparatus For Use In Zone 21 And Zone 22 Hazardous (Classified) Locations - Protection By Pressurization "pD" |
| ISA 61241-11 | Electrical Apparatus For Use In Zone 20, Zone 21 And Zone 22 Hazardous (Classified) Locations - Protection By Intrinsic Safety "iD" |
| ISA 61241-18 | Electrical Apparatus For Use In Zone 20, Zone 21 And Zone 22 Hazardous (Classified) Locations - Protection By Encapsulation "mD" |
| ISA RP12.06.01 | Recommended Practice for Wiring Methods for Hazardous (Classified) Locations Instrumentation - Part 1: Intrinsic Safety |
Mine Safety and Health Administration (MSHA)
| Standard | Title |
| 30 CFR | MINERAL RESOURCES (Parts 1 to 199) |
National Electrical Manufacturers Association (NEMA)
| Standard | Title |
| NEMA 250 | Enclosures for Electrical Equipment (1000 Volts Maximum) |
National Fire Protection Association (NFPA)
| Standard | Title |
| NFPA 70 | National Electrical Code (NEC) |
| NFPA 33 | Spray Application Using Flammable or Combustible Materials |
| NFPA 34 | Dipping and Coating Processes Using Flammable or Combustible Liquids |
| NFPA 61 | Prevention of Fires and Dust Explosions in Agricultural and Food Processing Facilities |
| NFPA 68 | Explosion Protection by Deflagration Venting |
| NFPA 69 | Explosion Prevention Systems |
| NFPA 77 | Static Electricity |
| NFPA 86 | Ovens and Furnaces |
| NFPA 91 | Exhaust Systems for Air Conveying of Vapors, Gases, Mists and Noncombustible Particulate Solids |
| NFPA 496 | Purged & Pressurized Enclosures for Electrical Equipment |
| NFPA 497 | Classification Of Flammable Liquids, Gases, Or Vapors And Of Hazardous (Classified) Locations For Electrical Installations In Chemical Process Areas |
| NFPA 499 | Recommended Practice For The Classification Of Combustible Dusts And Of Hazardous (Classified) Locations For Electrical Installations In Chemical Process Areas |
| NFPA 505 | Powered Industrial Trucks Including Type Designations, Area of Use, Conversions, Maintenance, and Operation |
| NFPA 654 | Prevention of Fire and Dust Explosions from the Manufacturing, Processing and Handling of Combustible Particulate Solids |
| NFPA 664 | Prevention of Fire and Explosions in Wood Processing and Woodworking Facilities |
| NFPA 820 | Fire Protection in Wastewater Treatment and Collection Facilities |
United States Coast Guard (USCG)
| Standard | Title |
| 46 CFR SHIPPING | (Subpart 111.105) |
