These requirements cover office furnishing panels@ study carrels@ work stations@ and pedestal-style systems that are mechanically interconnected to form an office furnishing system in accordance with the National Electrical Code@ ANSI/NFPA 70. These are able to be provided with an electrical distribution system@ including switches@ and receptacles@ and channels for routing communication cables within system components separate from electrical raceways. Office furnishing systems include filing cabinets@ desks@ work surfaces@ shelves@ storage units@ and similar items that have a particular electrical or mechanical function unique to an office furnishing system.These requirements also cover lighting units intended to be mechanically attached to particular components within an individual device or office furnishing system.These requirements do not cover panels that are intended to penetrate the ceiling@ or that are used to support the building structure.