In aircraft electrical installations, which orientation is recommended for routing wiring?

In aircraft electrical installations, which orientation is recommended for routing wiring?

• A. Vertical axis
• B. Lateral axis
• C. Longitudinal axis
• D. Diagonal axis

Answer: (C)

Wiring is routed along the longitudinal axis, from nose to tail. This direction aligns with the main structural members and equipment layout, so cables can run in built‑in channels with minimal bending. Fewer bends means less stress, lower risk of chafing, and easier inspection and maintenance. It also helps keep bundles away from moving parts and vibration hotspots near wings or tail surfaces. Routing along vertical, lateral, or diagonal orientations would cross more areas with movement or vibration and introduce extra bends, increasing wear and the potential for interference.

Wiring is routed along the longitudinal axis, from nose to tail. This direction aligns with the main structural members and equipment layout, so cables can run in built‑in channels with minimal bending. Fewer bends means less stress, lower risk of chafing, and easier inspection and maintenance. It also helps keep bundles away from moving parts and vibration hotspots near wings or tail surfaces. Routing along vertical, lateral, or diagonal orientations would cross more areas with movement or vibration and introduce extra bends, increasing wear and the potential for interference.