What is the purpose of abrasion-resistant sleeving in wiring repairs?

• A. Increases electrical resistance significantly.
• B. Provides cosmetic finish only.
• C. Improves data transmission speed.
• D. Protect repaired portions from wear.

Answer: (D)

Abrasion-resistant sleeving is used to shield the repaired wire area from mechanical wear. In aircraft wiring, repaired sections or damaged insulation’re exposed to bending, rubbing against panels, bundles, and other components as the airframe flexes and vibrates. The sleeving provides a durable outer layer that resists abrasion, helping to keep insulation intact and preventing conductive exposure or short circuits. It also helps keep moisture and contaminants out when paired with heat-shrink or adhesive-lined types. Its main purpose isn’t to change electrical resistance, improve data transmission speed, or provide cosmetic finish, but to preserve the repair under service conditions by preventing wear.