These requirements cover nonmetallic outlet boxes@ conduit bodies@ flush-device boxes@ extension rings@ covers@ floor boxes@ floor nozzles@ and concrete boxes to be employed in accordance with the National Electrical Code@ NFPA 70. These requirements do not cover boxes and covers for use in hazardous locations as defined in the National Electrical Code@ NFPA 70. These requirements do not cover cabinets and cutout boxes. A product that contains features@ characteristics@ components@ materials@ or systems new or different from those covered by the requirements in this standard@ and that involves a risk of fire or of electric shock or injury to persons shall be evaluated using appropriate additional component and end-product requirements to maintain the level of safety as originally anticipated by the intent of this standard. A product whose features@ characteristics@ components@ materials@ or systems conflict with specific requirements or provisions of this standard does not comply with this standard. Revision of requirements shall be proposed and adopted in conformance with the methods employed for development@ revision@ and implementation of this standard.