The aluminum alloy shell is used for air passing through the insulated bus duct, which is an indoor low-voltage bus duct. It consists of two right angle elbows from head to head, straight section, and vertical, as well as horizontal and right angle elbows, Z-shaped elbows, T-shaped and cross shaped, expansion joints, variable capacity joints, and terminals. The wiring method is flexible and easy to use, the structural design is compact, and it occupies less time and space. Due to its enclosed assembly of busbars, it uses network security and does not require special management and maintenance. On the straight (main) bus duct, power can be supplied to users through plug-in boxes, and the high flow control branch system can be diverted to the distribution box (or cabinet) bus through pipelines through T-shaped busbars.

The bus duct is composed of copper or aluminum busbars, aluminum alloy shells, phase to phase insulation components, and other connecting parts, making installation convenient. When connecting the busbar, tighten it with insulated bolts. The startup bus forms a pathway with external devices through soft connections. The terminal busbar is enclosed by a junction box. After connecting the busbar, seal it with a joint cover. The gap between the aluminum alloy shell can be sealed with glass glue, and the protection level is greater than IP30. The copper bars at the connection between busbars are tin plated (silver plated in special cases) to reduce the contact resistance between busbars or minimize the degree of copper oxidation at that location.