20世纪90年代以前低压配电系统中一直由电缆担负着输配电的重要角色。但90年代以来，母线槽系统逐渐被引进和开发，并迅速在建筑工程中得到广泛应用。它与传统输电器材相比有着其独特的性能优势，比如载流量大、过载能力强、分接方便、散热性好以及维护方便等。
Before the 1990s, cables played an important role in the low-voltage distribution system. But since the 1990s, the busbar slot system has been gradually introduced and developed, and has quickly been widely used in construction engineering. Compared with traditional transmission equipment, it has its unique performance advantages, such as large carrying capacity, strong overload capacity, convenient separation, good heat dissipation and convenient maintenance.
母线槽供电系统通常是主干线从配电中心引出以散射状灵活供电，而电缆供电则受分接难度大、载流量小、难以分散控制等因素限制，通常是"点对点"供电，特别是在高层建筑供电系统中，母线槽相比电缆的优越性尤为突出。传统电缆供电方式，每个楼层都需要单独放线，电缆根数众多。这样的密集敷设方式，散热性差、占用空间大、事故检查难、维修难度大。而母线槽供电只要使用单一的中心母线槽系统，在每个楼层设置相应容量的插接箱进行分流，即可达到供电目的。这种方式使得分接异常灵活，而且每个分支都有插接箱对分流变容处的保护。因此，采用母线槽更加安全、更加简单、更加可靠。
The bus trough power supply system is usually the main line from the distribution center to scattered flexible power supply, while the cable power supply is limited by factors such as difficult separation, small load capacity, and difficult dispersion control. It is usually "point to point" power supply, especially in the power supply system of high-rise buildings, the superiority of the bus trough is particularly prominent compared with the cable. Traditional cable power supply mode, each floor needs to set out separately, the number of cables. Such a intensive laying method, poor heat dissipation, large space, difficult accident inspection, difficult maintenance. As long as the single central bus slot power supply system is used, and the corresponding capacity plug box is set in each floor for distribution, the power supply purpose can be achieved. This way makes the split extremely flexible, and each branch has the plug box to protect the shunt transformer. Therefore, using the bus groove is safer, simpler and more reliable.
母线节约空间，而电缆需要很大的空间。母线槽可在离设备最近的位置进行控制，而电缆必须在配电室控制。母线配有标准的安装支架，无需其他支撑；电缆必须用单独的桥架或管道进行敷设。母线槽寿命可达50年，并可重复使用。而电缆较短，不可以重复使用。母线槽的分接口可增加分接回路，而电缆必须在配电室开始敷设。安装母线的保险费用比较低，而电缆相对较高。
The bus bar saves space, while the cable needs a lot of space. The bus groove can be controlled in the position nearest to the equipment, while the cable must be controlled in the distribution room. The bus is provided with standard mounting supports without additional support; cables must be laid with separate bridges or piping. The bus groove can last up to 50 years and is reusable. The cable is short and can not be reused. The branch interface of the bus groove can increase the tap loop, and the cable must be laid in the distribution room. The insurance cost of installing the bus is lower, while the cable is relatively high.