Open wiring refers to any wire, wire group, or wire bundle not enclosed in conduit or sleeve. Which option best completes this definition?

• A. Junction box
• B. Conduit or sleeve
• C. Raceway
• D. Cable tray

Answer: (B)

Open wiring is about wires that are not inside a protective enclosure. The term that best completes the definition is conduit or sleeve, because these are the enclosures that would surround and protect the conductors. Without such enclosing, the wiring is considered open. The other options describe means of routing or terminating wires (a junction box, raceway, or cable tray) but they don’t complete the idea of being not enclosed in a protective enclosure.