1.safety in power supply
2.simpleness in installation, low requirement to environment
3.free of maintenace

     the products are mainly applicable for power supply distribution system with supplying rated voltage under 1000V in middle and buildings,factory, mine, highway, runnel, airport, bridge, the places for cultural or sports activities, enterprise and institution. it has advantages such as safely in power supply, excellent insulation,ease in construction, low wide application, multiple categories, low requiement to installation environment and convenience in design and so on, it is at large used abroad and idal substitute for general cable and bus duct. in comparision with bus duct, it has even more functions e.g. shock proof, waterproof and fire resistance and avoids installation and maintenance of bus duct.