Should bus ducts or cables be used on the construction site of power distribution engineering.

In terms of its basic function, the bus duct is only equivalent to the function of a wire, used to connect lines, but the bus duct has a stronger carrying capacity than ordinary wires, reflected in its current and voltage carrying capacity. Used for medium and high voltage power supply and distribution lines. Widely used. The second is the insulation performance of the bus duct. In terms of insulation performance safety, it is incomparable to wires and cables and has high safety. Nowadays, some bus ducts can operate under various harsh conditions, such as underwater environments. In the power supply system of high-rise buildings, the main power supply line plays a very important role. It's like a large artery in the human body. Once it fails, it will result in serious consequences. Therefore, production, construction, and scientific research units have been constantly striving to learn and improve the reliability of the main power supply lines, in order to create new products that are easy to install, maintain, and manage, with high quality, low cost, and relatively stable performance. In the early 1980s, the main power supply lines for high-rise buildings mainly used reliable ordinary cables. Cables are laid along the walls of electrical shafts with brackets or cable trays. As the main power supply backbone, cables are safer and more reliable than bare wires and strips. But the current carrying capacity management is limited, and we cannot increase the cable cross-sectional area (the maximum problem can only be 400mm2). The cable is too thick, and the construction technology is difficult. Since the mid to late 1980s, China's urban economy has developed rapidly, with a large number of high-rise and super high-rise building enterprises constructing buildings. The electricity load of buildings has increased sharply, and the limitations of cables as a main power supply line have become increasingly prominent. Especially for students, the on-site design and production of network cable branch joints are difficult to manage, and there is an urgent need for large capacity and convenient branch power supply main line replacement. The advantage of bus duct current carrying capacity is reflected in the fact that bus duct, as a power supply main line, shows strong advantages compared to ordinary cables. With the passage of time, operational practice has shown that bus duct itself has many irreparable defects, so bus duct as the main line of power supply is not the most ideal product: firstly, it is expensive, has a large installation area, and a long installation cycle. High labor intensity and large investment at once. The second reason is that their production and lifestyle are mostly handmade, and the quality of product and service cannot be controlled or guaranteed. In addition, there are too many joints, many fault points, and poor reliability of the power supply system. Thirdly, its moisture resistance and corrosion resistance are poor, and the installation environment and requirements are high, resulting in a large maintenance workload.

Summary: For situations where the power load is small and there are not many branches, insulated wires should be used as much as possible for the main power line. If the requirements cannot be met, please use regular cables; For high-power loads and more branches, use the main power line. When ordinary cable companies cannot meet design requirements and the quantity is large, bus ducts are used; For households with high electricity loads, multiple branches, and main power supply lines using bus ducts, issues such as insulation, temperature rise, and noise are more prominent, resulting in poor overall economic and social benefits. When using prefabricated branch cables.