The bridge is a support for supporting and placing cables. Cable trays are widely used in engineering. As long as cables are laid, cable trays should be used. Cable trays are used as a supporting project of wiring engineering. The trunking is also known as the wiring trough, wiring trough, and line trunking (depending on the location). It is used to sort out the specifications of power lines, data lines, and other wires, and to fix the electrical appliances on the wall or ceiling. Generally, there are plastic materials and metal materials, which can play different roles. Next, Shandong cable tray manufacturer will talk about the specific differences between cable tray and trunking.
The size specifications are different. The bridge is relatively large (200 × 100 to 600 × 200), the trunking is relatively small. If there are many cables and wires, it is recommended to use bridge.
The material thickness is different. According to JGJ16-2008-5.1, metal trunking is also known as trough-type cable tray. It is generally a trough-type component made of 0.4-1.5mm thick whole steel plate. Conceptually, it is different from the cable tray in terms of height and width ratio. The tray frame is shallow and wide. The metal trunking has a certain depth and closure. However, the cable tray is more solid than the trunking. It is more used to place cables, and of course, it can also place wires, usually for strong current systems.
The filling rate is different. According to JGJ16-20088.5.3, the total cross-section of wires and cables in the trunking shall not exceed 20% of the cross-section in the trunking, and the number of current-carrying conductors shall not exceed 30, while the total cross-section of the cable tray shall not exceed 40% of the cross-section. This is due to the different installation height. The lower installation height must have a cover plate. If the cover plate has bad heat dissipation, the filling rate will be lower.
The tightness is different. The metal trunking is well sealed and can be laid in cable trench and building interlayer without support. Some trough-type bridges are semi-open and must be supported by brackets, which are generally erected in the air inside or outside the house.
Different strength. The cable tray is mainly used for laying power cables and control cables. The strength of the trunking is low, and it is usually used for laying wires and communication cables, such as network telephone.
The turning radius is different. The turning radius of the bridge is relatively large, and most of the trunking turns at right angles.
The span is different. The bridge span is relatively large, and the trunking is relatively small. Therefore, the number of fixed supports and hangers varies greatly.
The spacing between supports and hangers is different. According to JGJ16-2008, the trunking is no more than 2m and the bridge is 1.5~3m.
Different installation methods. The cable tray has special specifications, while the trunking is fixed without special specifications.
The specific difference between cable tray and trunking will be explained here. If you have any doubts or needs about this, please come to our website Consult and understand!