The busbar consists of several segments, each of which is short and light. Therefore, installation can be done quickly with just a few people. Busbars are stocked with many standard parts and can be shipped quickly to save time on site. Its tight “sandwich” structure reduces electrical space and frees up more space for commercial use, such as rental or as a public space. Installing cables is a tough job. Because individual cables tend to be heavy, installation requires many people to collaborate and take more time to complete. In addition, more installation space is required due to the bending radius of the cables.