Figure 5-1. Testing shoes on wearer

DOE-HDBK-1092-98

Figure 5-1. Testing shoes on wearer.

5.1.5.1 PERMANENT EQUIPMENT AND WIRING

The NEC and this section are minimum requirements for DOE facilities containing explosives.

Though the NEC does not specifically address explosives, Article 500, "Hazardous (Classified)

Locations," does establish requirements for the design and installation of electrical equipment and

wiring in locations containing combustible dusts and flammable liquids, vapors, or gases that in

general are comparably hazardous. All permanent electrical equipment and wiring in work areas

containing explosives hazards shall conform to the standards of the NEC Hazardous Locations Class

II or Class I and II (dual rated). For Class II installations, provisions should be made for easy

conversion to Class I.

5.1.5.2 HAZARDOUS LOCATIONS

NEC definitions of and requirements for hazardous locations Class I and Class II are modified as

follows for application to DOE explosives facilities:

1. Areas containing explosive dusts or explosives which may, through handling or processing,

produce dust capable of being dispersed in the atmosphere shall be regarded as Class II

Division 1 hazardous locations.

2. Areas that contain exposed explosives but where no dust hazard exists shall be regarded as

Class II Division 2 hazardous locations.

5-5