: Guidance for cases where heat-generating components are not uniformly distributed throughout the enclosure.
The methodology described in the involves a systematic assessment of heat generation versus dissipation: IEC TR 60890:2022 iec tr 60890 pdf
This document is a published by the International Electrotechnical Commission (IEC). It outlines a mathematical calculation method used to determine the temperature rise of assembly components without necessarily having to conduct physical heat-run tests on every single variation of an assembly. : Guidance for cases where heat-generating components are
Typical test procedures and interpretations iec tr 60890 pdf
(inside limit for wall-mounted: <1000W).