Degree rise refers to the increase in temperature that occurs within a component, conductor, or system when electrical current is applied.
Degree rise is a key thermal performance measurement used to understand how electrical equipment behaves when energized. As current flows through a conductor or electronic device, electrical resistance converts some of the energy into heat. This heat causes the temperature of the material or component to increase above the ambient starting point. The difference between the initial temperature and the elevated temperature is known as the degree rise.
In commercial and industrial environments, degree rise is essential for evaluating the performance, durability, and safety of electrical conductors, power supplies, transformers, enclosures, and other current-carrying components. Excessive temperature increase can affect material integrity, reduce conductor efficiency, accelerate insulation aging, and impact long-term system reliability. For wire and cable applications, degree rise directly relates to conductor size, current load, material properties, and environmental operating conditions.
Degree rise is particularly relevant in systems requiring continuous current flow, including building automation wiring, access control power circuits, AV equipment, communication devices, and industrial control networks. It is also an important metric during product testing and certification, where components must demonstrate stable operation without exceeding allowable thermal limits.
Because degree rise is influenced by factors such as conductor resistance, airflow, insulation type, and overall heat dissipation capability, it is frequently referenced in engineering assessments, equipment specifications, and performance evaluations across a wide range of electrical technologies.
Degree rise is commonly referenced within electrical testing practices and evaluation methods published by organizations such as IEEE and IEC.
The concept of temperature rise has been part of electrical engineering since early studies of conductor resistance and thermal behavior. As electrical systems expanded into commercial and industrial infrastructures, degree rise became a standardized measure for evaluating equipment capability, safety, and long-term reliability.