What is the standard voltage rating for aircraft electrical wire?

The standard voltage rating for aircraft electrical wire is 600 Volts. This rating is established to ensure the safety and reliability of electrical systems in aircraft. Aircraft are designed to operate in demanding environments with varying temperatures and conditions, so the materials used for wiring must be able to withstand electrical stress without risk of failure.

Selecting a voltage rating of 600 Volts allows for the safe operation of most aircraft electrical systems, including those used for avionics, lighting, and other vital equipment, without exceeding the dielectric strength of the wire insulation. Higher voltage ratings like 800 or 1000 Volts may be seen in specialized applications, but the general standard in aviation is 600 Volts, as it balances safety, performance, and compatibility with existing electrical systems.