: If the ambient temperature exceeds the rated value (often for cables), a correction factor ( Ctcap C sub t ) must be applied. Example : A cable rated for 100A at might only safely carry 82A at depending on the NEC Ampacity Tables.
You have a THHN copper wire rated for 100 Amps . derating calculation
Manufacturers typically rate equipment based on "ideal" conditions—usually an ambient temperature of : If the ambient temperature exceeds the rated
Most datasheets provide a . You can calculate the maximum allowed power using this linear formula: 70-80% is typical.
For high-reliability (military/aerospace) designs, never exceed 50% of a component's rated value. For commercial products, 70-80% is typical.
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: If the ambient temperature exceeds the rated value (often for cables), a correction factor ( Ctcap C sub t ) must be applied. Example : A cable rated for 100A at might only safely carry 82A at depending on the NEC Ampacity Tables. You have a THHN copper wire rated for 100 Amps . Manufacturers typically rate equipment based on "ideal" conditions—usually an ambient temperature of Most datasheets provide a . You can calculate the maximum allowed power using this linear formula: For high-reliability (military/aerospace) designs, never exceed 50% of a component's rated value. For commercial products, 70-80% is typical. |