Green or green-yellow color in aircraft wiring indicates what?

Green or green-yellow color in aircraft wiring indicates what?

• A. Grounding or special circuits per OEM.
• B. Positive/hot.
• C. Neutral.
• D. Data lines.

Answer: (A)

Green or green-yellow wiring marks grounding paths in aircraft electrical systems. The green-yellow stripe is the protective earth conductor, and plain green can also indicate a grounding or chassis-ground relationship. This color coding helps technicians quickly identify return paths for fault currents and prevents mixing ground conductors with power or data lines. Some OEMs may designate green for special circuits as defined by the manufacturer, but the main idea is that green colors point to grounding-related functions rather than power or signal lines. Always verify wiring diagrams for any OEM-specific conventions.

Green or green-yellow wiring marks grounding paths in aircraft electrical systems. The green-yellow stripe is the protective earth conductor, and plain green can also indicate a grounding or chassis-ground relationship. This color coding helps technicians quickly identify return paths for fault currents and prevents mixing ground conductors with power or data lines. Some OEMs may designate green for special circuits as defined by the manufacturer, but the main idea is that green colors point to grounding-related functions rather than power or signal lines. Always verify wiring diagrams for any OEM-specific conventions.