An accessory which serves to complete a conduit system, such as bushings and access fittings is known as?

The correct choice identifies an accessory that plays an essential role in completing a conduit system. These accessories, which include various forms of bushings and access fittings, are crucial for ensuring that the installation is safe, functional, and aesthetically pleasing.

Selecting sleeve reflects an understanding that these components are designed to protect cables as they pass through conduits and to facilitate connections between pipes and fittings. Sleeves help prevent physical damage to wires while also aiding in the neat arrangement of the conduit system. Their function is significant in maintaining the integrity of the electrical installation.

The other options do not fit this specific role as clearly as the selected accessory does. Bonding jumpers, for example, are used for grounding purposes rather than completing conduit systems. Conduit fittings, while relevant, are a broader category that includes various types of connections, and threaded connectors specifically refer to a method of joining conduit sections rather than finishing the system with protective features like sleeves. Understanding these distinctions reinforces the importance of using the proper terminology and recognizing the roles of different components in electrical installations.