UL RP 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.
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. FPN: The means for identifying listed equipment may vary for each organization concerned with product evaluation, some of which do not recognize equipment as listed unless it is also labeled.