Professional Answer: Power cables are typically rated for a standard ambient temperature, usually 30°C for air and 20°C for soil. If the installation environment's ambient temperature is higher than this standard, the cable's ability to dissipate heat is reduced. This requires a derating factor to be applied, lowering the cable's permissible current capacity to maintain its operating temperature within safe limits. For example, a cable installed in a hot climate or a poorly ventilated substation will require more significant derating than one in a cooler environment. Our equipment helps professionals manage installations in various climate zones, ensuring that correct cable management practices are followed for a safe and effective power grid.