Covers are placed over open straight-section, single-channel raceways to protect the wire and cable inside. They keep out dust, dirt, and other debris, and they prevent personnel from accidentally touching the wire and cable. The brand and series of the cover must match the brand and series of the raceway. Covers are only required for straight-section raceways that do not include a built-in or separate cover.

Tees have three openings on 90° angles to route nonmetallic single-channel raceways in two directions. They're ideal for branching out wire and cable to independent raceway systems or to a device.

Couplings are placed over the seam where two straight-section, nonmetallic single-channel raceways come together. They provide a finished, neat appearance and cover jagged edges that could cause injury or damage conduit.

Outlet boxes house wiring devices like switches and receptacles. They're placed along a nonmetallic single-channel raceway system to provide convenient access to power, such as near desks in an office.