Standard 121201, Edition 9
UL 121201

Nonincendive Electrical Equipment for Use in Class I and II, Division 2 and Class III, Divisions 1 and 2 Hazardous (Classified) Locations

UL Standard Edition 9 Published Date: September 15, 2017 Last Revision: April 01, 2021 ANSI Approved: April 01, 2021

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April 01, 2021 Redline Revision
August 26, 2019 Redline Revision
August 31, 2018 Redline Revision
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November 06, 2020
June 12, 2020
May 31, 2019
May 15, 2019
March 08, 2019
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Referenced Standards (20)

Below is a list of UL Standards referenced in UL 121201

StandardEditionTitle
50 14 Enclosures for Electrical Equipment, Non-Environmental Considerations
50E 3 Enclosures for Electrical Equipment, Environmental Considerations
157 2 Standard for Gaskets and Seals
508 18 Industrial Control Equipment
746B 5 Polymeric Materials - Long Term Property Evaluations
783 6 Electric Flashlights and Lanterns for Use in Hazardous (Classified) Locations
823 9 Electric Heaters For Use In Hazardous (Classified) Locations
844 13 Luminaires for Use in Hazardous (Classified) Locations
1836 6 Outline of Investigation for Electric Motors and Generators for Use in Class I, Division 2, Class I, Zone 2, Class II, Division 2 and Zone 22 Hazardous (Classified) Locations
1977 4 Component Connectors for Use in Data, Signal, Control and Power Applications
2237 1 Multi-Point Interconnection Power Cable Assemblies for Industrial Machinery
2238 3 Cable Assemblies and Fittings for Industrial Control and Signal Distribution
60079-0 7 Explosive Atmospheres - Part 0: Equipment - General Requirements
60079-1 7 Explosive Atmospheres - Part 1: Equipment Protection by Flameproof Enclosures
60950-1 2 Information Technology Equipment - Safety - Part 1: General Requirements
61010-1 3 Safety Requirements for Electrical Equipment For Measurement, Control, and Laboratory Use; Part 1: General Requirements
62368-1 3 Audio/Video, Information and Communication Technology Equipment - Part 1: Safety Requirements
60079-11 6 Explosive Atmospheres - Part 11: Equipment Protection by Intrinsic Safety
60079-15 5 Explosive atmospheres - Part 15: Equipment protection by type of protection
60079-30-1 1 Explosive Atmospheres - Part 30-1: Electrical Resistance Trace Heating - General and Testing Requirements
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Reverse Referenced Standards (13)

UL 121201 is referenced in the following list of UL Standards

StandardEditionTitle
87A 2 Power-Operated Dispensing Devices for Gasoline and Gasoline/Ethanol Blends with Nominal Ethanol Concentrations up to 85 Percent (E0 - E85)
87B 2 Power-Operated Dispensing Devices for Diesel Fuel, Biodiesel Fuel, Diesel/Biodiesel Blends with Nominal Biodiesel Concentrations up to 20 Percent (B20), Kerosene, and Fuel Oil
495 5 Power-Operated LP-Gas Dispensing Equipment
1254 6 Pre-Engineered and Engineered Dry and Pre-Engineered Wet Chemical Extinguishing System Units
1254 6 ANSI/CAN/UL/ULC Standard for Pre-Engineered and Engineered Dry and Pre-Engineered Wet Chemical Extinguishing System Units
1389 1 Plant Oil Extraction Equipment for Installation and Use in Ordinary (Unclassified) Locations and Hazardous (Classified) Locations
1389 1 Plant Oil Extraction Equipment for Installation and Use in Ordinary (Unclassified) Locations and Hazardous (Classified) Locations
1836 6 Outline of Investigation for Electric Motors and Generators for Use in Class I, Division 2, Class I, Zone 2, Class II, Division 2 and Zone 22 Hazardous (Classified) Locations
2583 1 ANSI/CAN/UL/ULC Standard for Safety for Fuel Tank Accessories for Flammable and Combustible Liquids
2583 1 ANSI/CAN/UL/ULC Standard for Safety for Fuel Tank Accessories for Flammable and Combustible Liquids
120101 1 Definitions and Information Pertaining to Electrical Equipment in Hazardous Locations
121203 2 Recommended Practice for Portable/Personal Electronic Products Suitable for Use in Class I, Division 2, Class I, Zone 2, Class II, Division 2, Class III, Division 1, Class III, Division 2, Zone 21 and Zone 22 Hazardous (Classified) Locations
60335-2-24 3 Household and Similar Electrical Appliances - Safety - Part 2-24: Particular Requirements for Refrigerating Appliances, Ice-Cream Appliances and Ice-Makers
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