Examples include, but are not limited to, occupied buildings, control buildings, or buildings that contain high value contents or critical equipment or supplies. Obviously, some judgement is involved in determining whether a building is important enough to warrant compliance with the separation distances. The screens are not required by NFPA 30. However, some third-party certification organizations require the screen in order to obtain listing or approval. NFPA 30 does not require that the cabinet itself be grounded.
Many manufacturers provide a grounding screw on their cabinets as a convenience to the user.
The user can connect this screw to a building ground and use the cabinet-mounted ground point as needed to ground individual containers from which liquids are dispensed. NFPA 30 does not require an exhaust ventilation system for storage cabinets, although most cabinets have plugged fittings that can be used for such purpose. Exhaust ventilation should only be provided when warranted by the materials in the cabinet, for example for particularly toxic or noxious materials. If provided the manufacturer's instructions should be followed. Typically, this will involve small diameter steel duct or pipe leading directly and by the shortest route to the exterior of the building.