Provide specific test requirements for qualifying electrical resistance heating cable for industrial applications, and provide a basis for electrical and thermal design. Applications include unclassified, Class I, Class II and Division I and Division 2 areas. 1. Revise standard per five year review cycle and 2. Revise style to conform to new style manual and international requirements with the intent of submitting as an international standard. Revision Standard - Superseded. The specific test requirements for qualifying electrical resistance heating cables for industrial service are provided, as well as the basis for electrical and thermal design. Heating device characteristics are addressed, and installation and maintenance requirements are detailed. Heating cable and surface heating device application recommendations and requirements are made for ordinary (unclassified) and hazardous (classified) potentially flammable atmospheres and locations.