Cable tray is a modern cable, fiber optic supporting equipment, the beginning of the technology and talent from foreign bows l into, after many years of development, and slowly in all walks of life in our country is widely used, it is mainly used for cables, cables and optical fiber support and protection role. Therefore, the purchase of cable tray is crucial, directly related to the cable can operate normally. So we should be in the purchase of cable tray when how to choose?

Low voltage loss: Due to the low resistivity of copper core cables, the same current flows through the same cross section. The voltage drop of copper core cable is small. The same transmission distance, can ensure higher voltage quality; in the allowable voltage drop conditions, copper core cable transmission can reach a longer distance, that is, the power supply covers a large area, which is conducive to the planning of the network, reducing the number of power supply points set up.

Aluminum alloy cable in China has not been applied for a long time but there have been cases showing that aluminum alloy cable applications in cities and factories and mines have huge hidden dangers and risks, the following two actual cases and the eight factors that lead to risky accidents of aluminum alloy cables are discussed.

In the engineering design documents are usually generalized cable tray called “bridge”, did not point out the specific structural features, different types, different production materials, cable tray price difference is large, and the structure of the type of confusion will bring about the work site heat dissipation, mechanical protection problems. Therefore, at the design stage, designers should be required to choose the structural characteristics of cable trays according to the characteristics of the project environment and technical requirements, and clearly express them in the model labeling and material table of the plan.