scope:

This standard specifies the particular requirements for construction, test and marking for Land Mobile Radio (LMR) equipment and accessories for use in Class I, Division 1, locations as defined by the National Electrical Code, ANSI/NFPA 70. This LMR equipment, within the operational parameters specified by the manufacturer, ensures a very high level of protection that includes rare malfunctions related to the equipment or two expected malfunctions occurring independently of each other.

NOTE 1: A malfunction may result from a failure of the component parts of the electrical equipment or from anticipated externally applied influences. Two independent expected malfunctions which, separately, would not create a source of ignition, but which, in combination, do create a source of ignition, are regarded as a single rare malfunction.

NOTE 2: This LMR equipment is intended for use in Class I, Division 1, locations where ignitable mixtures of flammable gases or vapors are present frequently during normal operations.

This standard applies to equipment with a nominal battery voltage not exceeding 24 Vdc.

Purpose

This standard states testing and certification requirements for Land Mobile Radios for use in Class I, Division 1 Hazardous (Classified) Locations.

Testing and certification criteria may include, but are not limited to, performance requirements, marking requirements, examination of manufacturing facility(ies), audit of quality assurance procedures, and a surveillance program.