Under high-temperature operating conditions, cross-linking bonds may break due to thermal oxidation or electrical stress, leading to a decrease in the degree of cross-linking.

The sheath material must have good cold resistance and impact resistance to protect the internal insulation layer from the influence of the external environment.

The cold resistance of thermoplastic low-smoke halogen-free flame retardant cable material is the basis for its low-temperature performance.

Outdoor cables can have a surface temperature significantly higher than the ambient temperature under direct sunlight, especially in summer when the surface temperature of black cables can reach a high level.

Antioxidants block the propagation of oxidation chain reactions by capturing free radicals or peroxides produced by ozone decomposition.

For aging cables, local repair techniques can be used, such as injecting restorative insulation materials, to restore their insulation performance.