Wire Derating

The primary goal of derating is . Most standard ampacity charts assume "ideal" conditions: a single wire in free air at a standard room temperature (typically ). However, real-world installations are rarely ideal.

You must use the lowest temperature rating of the weakest link in the system to determine your starting point. wire derating

Apply factors to the base ampacity (from the insulation temp column). Do not derate twice from the same table. The primary goal of derating is