When wires and cables are powered on, the metal core will generate heat. As the power on time increases, the temperature on the surface of the wires and cables will become higher and higher. If not handled in a timely manner, the consequences can be imagined. The sheath of our commonly used PVC wires and cables is made of PVC, which is considered based on the upper limit of the core temperature of 70 degrees. The surface temperature will be 5 to 10 degrees lower. Therefore, the cable surface temperature below 60 degrees Celsius is fundamentally safe. From the perspective of power supply maintenance, of course, the lower the temperature, the better.
Cable is a wire product used to transmit electrical energy information and achieve electromagnetic energy conversion. "There are both conductors and insulating layers, and sometimes a tight inner protective layer that prevents moisture intrusion, or an outer protective layer with high mechanical strength. Products with complex structures and large cross-sectional areas are called cables.".
Although the wire and cable industry is only a supporting industry, it accounts for 1/4 of the output value of China's electrical industry. It has a wide variety of products and a wide range of applications, involving industries such as electricity, construction, communications, and manufacturing, and is closely related to various sectors of the national economy. What are the categories of wire and cable products? Let me take you to a more detailed understanding.