Which type of conductor is more resistant to vibrations?

Which type of conductor is more resistant to vibrations?

• A. Solid
• B. Stranded
• C. Coaxial
• D. Ribbon

Answer: (B)

When a conductor is subjected to vibrations, flexibility is key to resisting fatigue. A stranded conductor, made of many thin strands twisted together, can absorb and distribute the motion among the individual strands. This means bending and vibration are shared across multiple paths, reducing the stress on any one element and lowering the chance of crack initiation. A solid conductor, by contrast, is stiffer and concentrates bending stress at specific cross-sections, which accelerates fatigue and failure under repetitive vibrations. Coaxial designs and ribbon configurations have other electrical and mechanical goals (shielding/impedance for coaxial, flat, broad conductors for ribbon), so they don’t inherently provide the same vibration resistance as a stranded assembly.

When a conductor is subjected to vibrations, flexibility is key to resisting fatigue. A stranded conductor, made of many thin strands twisted together, can absorb and distribute the motion among the individual strands. This means bending and vibration are shared across multiple paths, reducing the stress on any one element and lowering the chance of crack initiation. A solid conductor, by contrast, is stiffer and concentrates bending stress at specific cross-sections, which accelerates fatigue and failure under repetitive vibrations. Coaxial designs and ribbon configurations have other electrical and mechanical goals (shielding/impedance for coaxial, flat, broad conductors for ribbon), so they don’t inherently provide the same vibration resistance as a stranded assembly.