A key advantage of solid conductors in fixed wiring is:

• A. Better flexibility for bending
• B. Easier to terminate at fixed terminals
• C. Higher conductivity than equivalent cross-section
• D. Superior vibration resistance

Answer: (B)

In fixed wiring, the main advantage is reliable and straightforward termination. A solid conductor is a single, uniform piece, so it slips neatly into a terminal clamp and can be tightened to the correct torque without worrying about strands fraying, splaying, or needing extra components. This makes assemblies quicker and reduces the risk of a loose contact, which is crucial for fixed installations where the conductors aren’t meant to move. Stranded conductors can require ferrules or special lugs to achieve the same reliability in a fixed terminal, and without those, the termination can be more prone to looseness. The other statements describe properties that don’t primarily apply to fixed-terminals connections: flexibility for bending is a feature of stranded conductors, electrical conductivity depends on cross-section and material rather than being solid vs stranded, and vibration resistance isn’t the primary advantage in fixed wiring.