Standard Hazardous Material Storage (Explosion Proof) Refrigerators & Freezers meet NFPA and OSHA guidelines for Hazardous Locations, Class 1, Division II, Group C & D. These units are engineered for use in environments where volatile / explosive conditions could potentially exist. They are not intended for common lab / room environments that are not designed to be explosion proof (See: Flammable Material units). Units are designed with no internal electrical components and all external components are sealed per NFPA and OSHA guidelines. Units must be hard wired in conduit to 120VAC power source. *For Manual Defrost Freezers, periodic manual defrosting is required. *Power cords with plugs are NOT ACCEPTABLE.