What is the operating temperature for electrical cable?

The operating temperature of an electrical cable normally refers to the minimum and maximum temperature that the cable can safely operate at for a sustained period of time. This operating temperature is determined by the insulation and/or sheathing material around the cable.

Each material type will have an upper and lower range of temperatures within which it continues to be suitable for use. This varies widely depending on the material type as well as whether or not the cable is required to be flexible at these temperatures. Generally, materials soften at higher temperatures and become rigid at lower temperatures making the material less suitable for applications involving flexing at either low or high temperatures.

A typical PVC insulation material has a temperature range of -15°C to 70°C for applications. Silicone rubber typically has a temperature range of -60°C to 180°C for fixed applications

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