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Changzhou Qiaobang Storage Equipment Co.,Ltd

Difference Between The Cable Tray And Trunking

About cable tray

Cable tray is divided into: trough tray and ladder-style, network-style structure, from the bracket, arm and installation of accessories and other components. Can be erected independently, can also be attached to a variety of construction (structures) and pipe gallery bracket, reflecting the simple structure, handsome in appearance, flexible configuration and easy maintenance, all the parts are required for galvanized, installed in the building Exposed bridge, if it is adjacent to the sea or belong to the corroded area, the material must have anti-corrosion, moisture resistance, good adhesion, high impact strength properties.

The cable tray is a bracket that holds and releases the cable. Bridge in the engineering is very common, as long as the laying of the cable will use the bridge, cable tray as a wiring project supporting projects, there is no specific normative guidance, a manufacturer's lack of versatility program specifications, therefore, the design selection The process should be based on the type of weak lines of various systems cables, the number of rational selection of the applicable bridge. Cable tray with a full range, wide application, high strength, light weight, low cost, simple construction, flexible wiring, installation standards, good looks and so on.

Classification of the bridge: Cascade cable tray, tray cable tray, trough cable tray, large span cable tray.

About the trunking

Trunking is used to power lines, data lines and other wire norms finishing, fixed on the wall or ceiling electrical tools. There are two general plastic materials and metal materials, can play a different role.

Troughs are divided into: insulated wiring trough, pull-out wiring trough, mini-wiring trough, separate wiring trough, interior wiring trough, integrated insulation trough, telephone trough, Japanese telephone Wiring trunking, wire trunking, circular wiring duct, wiring booths for the exhibition partition, circular floor wiring groove, soft circular floor wiring groove, cover-type wiring groove. According to the different materials, a variety of trunking according to the division, commonly used green PVC trunking, halogen-free PPO trunking, halogen-free PC / ABS trunking, steel and aluminum and other metal trunking and so on.

Trough features: suitable for large span installation, installation is extremely convenient, extremely safe and reliable, flexible wiring, interchangeability.

The difference between the cable tray and trunking

1, the size specifications are different. The cable tray is relatively large (200 × 100 to 600 × 200), the trough is relatively small. If the cable more wires, it is recommended to use the cable tray.

2, Different material thickness. According to JGJ16-2008-5.1 metal trunking, also known as slotted tray, generally 0.4-1.5mm thick steel sheet from the curved curved groove parts, the concept is different from the bridge is high, different width, the tray shallow And wide, metal trough is a certain depth and closure. But the bridge is stronger than the trunking, more used to put the cable, of course, you can discharge lines, usually strong power system.

3,filling rate is different. According to JGJ16-20088.5.3, the total cross-section of wire and cable within the trunking should not exceed 20% of the cross-section of the trunking, and the current-carrying conductor does not exceed 30, whereas the total cross-section of the cable that the bridge is of should not exceed 40% of the cross-section. This is due to the installation of different height due to the installation of a low height must have a cover, a bad heat dissipation, filling rate will be smaller.

4, different sealing. Metal wire slot seal better, not necessarily support the support, can be laid in the cable trench and the construction of mezzanine. Some of the trough bridge is semi-open type, there must be a bracket to support, in the house or outside the building generally erected.

5, different intensity. Bridge is mainly used for laying power cables and control cables, the lower the strength of the trunking, usually used to lay wire and communication cables, such as Internet telephony.

6, different turning radius. Bridge bending radius is relatively large, most of the right angle groove bend.

7, different span. Bridge span is relatively large, smaller trunking. Therefore, a large difference between the fixed bracket, hanger the number of large differences.

8, hanger spacing different. According to JGJ16-2008, the trough is not more than 2m, the bridge is 1.5 ~ 3m.

9, different installation methods. Bridge has a special specification (see CECS31.91), while the trough no special norms fixed.

10, stamped board problem. CECS31 "Steel Cable Tray Engineering Design Code" is defined as the bridge is collectively referred to as the annex cover, as mentioned in JGJ16-20088.10.3, the bridge installation height can not meet the requirements, should be covered with protection. In other words, the definition of the word bridge is not covered. However, GB29415-2013 "fire-resistant cable box", the trough is covered with the cover, is a trough as a whole.