What is the minimum number of conductor strands required in aircraft quality wire?

• A. 12
• B. 8
• C. 19
• D. 24

Answer: (C)

Aircraft-quality wire uses multiple copper strands to withstand frequent bending and vibration without fatigue. The number of strands directly affects flexibility and durability: more strands mean greater ability to bend and flex repeatedly, which is essential in the harsh environment of aircraft wiring.

The standard specifies nineteen strands as the minimum for the conductor. If you try to meet the same cross-sectional area with fewer strands, the wire becomes stiffer and more prone to fatigue and strand breakage in service. A higher strand count, like twenty-four, can offer even greater flexibility, but the minimum required to meet aviation standards is nineteen.