The fire-resistant bus duct is made of high-performance insulation material using a special formula of composite resin and a quantitatively selected mixture of materials.Fire resistant bus ducts can be widely used in high-rise buildings with difficult fire protection,explosion hazards,corrosive liquids and other harsh industrial and mining conditions,as well as in outdoor,trench and other high humidity or potentially submerged structures.Electrical equipment that operates in a normal environment may also experience malfunctions,which is inevitable.Short circuits are a common fault in electrical equipment.Once a short circuit occurs,electrical equipment cannot be immediately disconnected,and the distribution main line will inevitably experience overload.

　　Distribution lines operating in normal environments must have overload resistance.When using fire-resistant bus ducts as distribution lines,their enclosure protection level is sufficient to meet the requirements.There are 24 fixed bolts on each side of the flange of the flexible joint box at both ends of the expansion joint.Small aluminum bars are installed between each pair of bolts to facilitate the diversion of the concealed crossover aluminum bars;The busbar casing is three-phase short circuited and grounded,and there is no potential difference between the axial electromotive force induced on the aluminum casing and the ground;In engineering,cables with a specification of 400mm or less are generally used for power distribution,requiring multiple cables to supply power simultaneously.

　　The shell of the fire-resistant bus duct coated with fire-resistant coating and the bus wrapped around the fire-resistant bus duct are composed of a bracket made of fire-resistant insulation material,with multiple grooves on the bracket for inserting and fixing the bus.One end of the fire-resistant bus duct has a bus duct connection box,and there is a bus tap box inside the bus duct.Fire resistant busbar trunking has excellent insulation performance and can be used continuously in normal environments or for more than one hour in fire environments.It is suitable for high-rise buildings and important facilities to replace fire-resistant cables for power transmission and distribution.The installation of fire-resistant busbar trunking should not be carried out in adverse weather conditions such as cloudy rain and dust.