UL 121203-2021 pdf download – 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.
3.2 Where reference is made to any Standards, such reference shall be considered to refer to the latest editions and revisions thereto available at the time of printing unless otherwise specified. FM 60079-29-2, Explosive Atmospheres – Part 29-2: Gas Detectors – Selection, Installation, Use and Maintenance ofDetectors forFlammable Gases and Oxygen ITU-R BS.561.2, Definitions ofRadiation in LF, MF and HF broadcasting Bands NFPA 51B, Standard forFire Prevention During Welding, Cutting, and OtherHot Work NFPA 70, National Electrical Code® OSHA Regulation, General Requirements, SubPart S, Electrical 29CFR1910 UL 783, Electric Flashlights and Lanterns forUse in Hazardous (Classified) Locations UL 121201, Nonincendive Electrical Equipment forUse in Class I and II, Division 2 and Class III, Divisions 1 and 2 Hazardous (Classified) Locations UL 60079 Series, Explosive Atmospheres UL 60079-29-2, Explosive Atmospheres – Part 29-2: Gas Detectors – Selection, Installation, Use and Maintenance ofDetectors forFlammable Gases and Oxygen 4 Glossary 4.1 For the purpose of this recommended practice, the following definitions apply. 4.2 APPROVED – Acceptable to the authority having jurisdiction. 4.3 AUTHORITY HAVING JURISDICTION (AHJ) – The organization, office or individual that has the responsibility and authority for approving equipment, installations, or procedures. 4.4 BATTERY – An assembly consisting of one or more cells. When multiple cells are connected to each other, they to increase the voltage or capacity. 4.5 BUTTON CELL – Small round non-rechargeable cell, where the overall height is less than the diameter. 4.6 CELL – An assembly of electrodes and electrolytes which constitutes the smallest electrical unit of a battery.
4.10 EXCESSIVE TEMPERATURE – A temperature in excess of that tolerable to human touch [approximately 60°C (140°F)]. 4.11 GAS FREE WORK PERMIT (GFWP) – A permit, resulting from approval by an authorized person under the application of a defined documented management work process, stating that work involving potential ignition sources may be performed in a hazardous (classified) location by ensuring that the atmosphere is free of ignitable concentrations of flammable gases or vapors. Note 1 to entry: Refer to NFPA 51B which provides provisions to prevent loss of life and property from fire or explosion as a result of any work involving burning, welding, or similar operations that is capable of initiating fires or explosions. Note 2 to entry: Gas free work permit may sometimes be referred to as a “Hot Work Permit.” 4.12 LABELED – Equipment or materials to which has been attached a label, symbol, or other identifying mark of an organization that is acceptable to the authority having jurisdiction and concerned with product evaluation, that maintains periodic inspection of production of labeled equipment or materials, and by whose labeling the manufacturer indicates compliance with appropriate standards or performance in a specified manner. 4.13 LISTED – Equipment, materials, or services included in a list published by an organization that is acceptable to the authority having jurisdiction and concerned with evaluation of products or services, that maintains periodic inspection of production of listed equipment or materials or periodic evaluation of services, and whose listing states that either the equipment, material, or services meets identified standards or has been tested and found suitable for a specified purpose.