Why is proper torque on connector terminals critical in aircraft wiring?

Why is proper torque on connector terminals critical in aircraft wiring?

• A. It does not affect electrical performance
• B. Proper torque reduces high resistance, heating, arcing, faults or fires
• C. Torque only affects mechanical fit
• D. Over-torque improves conductivity indefinitely

Answer: (B)

The important idea is that the clamping force from the right torque keeps the electrical contact solid and reliable in an aircraft’s vibration and temperature environment. When the torque is correct, the terminal presses firmly against the conductor, keeping resistance low and the connection stable so heating, arcing, and faults are minimized. If torque is too low, the connection can loosen, raising resistance, causing intermittent contact, overheating, or arcing that can lead to faults or fires. If torque is too high, you risk damaging threads, crimp integrity, or the terminal itself, which again degrades the contact and can cause failure. So the right torque directly reduces resistance, heat, arcing, and the chance of faults or fires, making it the best choice.

The important idea is that the clamping force from the right torque keeps the electrical contact solid and reliable in an aircraft’s vibration and temperature environment. When the torque is correct, the terminal presses firmly against the conductor, keeping resistance low and the connection stable so heating, arcing, and faults are minimized. If torque is too low, the connection can loosen, raising resistance, causing intermittent contact, overheating, or arcing that can lead to faults or fires. If torque is too high, you risk damaging threads, crimp integrity, or the terminal itself, which again degrades the contact and can cause failure. So the right torque directly reduces resistance, heat, arcing, and the chance of faults or fires, making it the best choice.