Professional Cable Tray Manufacturer

Shandong Hongfeng Electric Group Co., Ltd.

The products can be widely used in construction, energy, power, plant.

Bending properties and installation requirements of aluminum alloy cable tray

Release time:

2023-12-22

The use of aluminum alloy cable reduces the installation layout space, reduces the installation

Bending performance and installation requirements of aluminum alloy bridge 1. Bending performance according to the bending radius of copper cable installation in GB/T12706, the bending radius of copper cable is 10'20 times the cable diameter, and the bending radius of aluminum alloy bridge is 7 times the cable diameter.
1.The use of aluminum alloy cable reduces the installation layout space, reduces the installation cost and is easier to lay.
2. The elongation of ductile aluminum alloy bridge can reach or exceed 30% after annealing, which is higher than the 25% standard of copper cable.
3. The anti-elasticity of the anti-elastic aluminum alloy bridge is 40% lower than that of the copper cable, which is more conducive to the tightness of the terminal connection, easy to press, and improve the stability of the connection. 4. The corrosion resistance of aluminum alloy perforated cable tray in air is better than that of copper. The service life of copper cable is designed according to 30 years, and the service life of aluminum alloy cable can reach 40 years, which is based on the fact that it is applied in the United States.
5. Aluminum alloy cable with the same weight and the same length of carrying capacity is half the weight of copper cable, which has obvious advantages in long-span installation. 6. According to the electrical conductivity of GB/T3956 aluminum alloy conductor, one or two specifications are increased compared with copper conductor to achieve the same ampacity, that is, the cross section of aluminum alloy increases by 1.5 times to achieve the same conductive effect of copper.
The installation requirements of power cable when using tray wiring: (1) the time distance of supporting (fixing) column when laying cable tray horizontally should be selected at 1.5-3m according to the load-bearing size.
The vertical fixation should not be more than 2m.
(2) the bridge tray is generally not less than 2.5m from the ground and not less than 1.8m when it is vertically laid. Cover plate protection should be applied when the height is insufficient.
(3) when the multi-layer shelf is disassembled and installed, the upper tray is not less than 0.3m from the roof (ceiling).
(4) the cables can be arranged and laid without spacing in the tray, but they are not allowed to press each other, and the filling rate in the tray should not be more than 40% of the cross-sectional mask.
(5) the bridge should not be laid above the thermal pipes and in places with erosive gases.
(6) Power cables supplied by different power sources; for power perforated cable tray of different voltage levels, the bridge should not be laid in a unified tray.
(7) the cable laid by the bridge shall be marked with the cable number, type, specification, length, starting and ending point, etc., at the head, tail and every 50m.
(8) when passing through the building expansion joint along the bridge bridge, it should be divided into sections (100mm).
(9) the metal bridge should be well grounded (zero).
(10) the minimum distance between bridge frame and other pipes (m) the general pipe spacing is 0.4 m parallel spacing and 0.3 m cross spacing, the erosive pipe parallel spacing is 0.5 m, the cross spacing is 0.5 m, the parallel spacing of thermal pipes with insulation layer is 0.5 m, the cross spacing is 0.5 m, and the parallel spacing without insulation layer is 1.0 m, the cross spacing is 1.0 m.

Keywords：

Get to know the most basic performance advantages of cable tray

What is the main function and influence of aluminum alloy cable tray connecting piece

Get to know the most basic performance advantages of cable tray

What is the main function and influence of aluminum alloy cable tray connecting piece