Professional Cable Tray Manufacturer

(1) the laying direction of trough cable tray should be short and quick, and should be laid along the wall, column or beam as far as possible. 
(2) according to the laying trend of trough cable tray, the position and load of pre-embedded steel plate are proposed to civil engineering and structural majors to reserve wall holes, floor holes and hanger installation. 
And it should be coordinated with the major of technology, plumbing and power. 
(3) the wiring of hidden metal wire grooves in the ground should be closely coordinated with the civil engineering specialty in the design, so that the route path and equipment selection can be reasonably determined according to different structural types and building layout. 
(4) cables of different voltages and different uses should not be laid in the same layer of cable tray: 
(1) cables above 1kV and below 1kV. 
(2) double-circuit cables supplying power to the first-stage load on the same path. 
(3) cables for emergency lighting and other lighting. 
(IV) Power, control and telecommunications cables. 
If different grades of cables are laid in the same cable tray, partition isolation should be added in the middle. 
(5) when the additional concentrated load is not considered for installation or maintenance under engineering conditions, the working uniformly distributed load of the trough cable tray is calculated according to the uniform distribution of cable weight. 
(6) the trough cable tray should not be laid in parallel with the following pipelines. When it is unavoidable, the position of the cable tray shall comply with the following provisions, or take corresponding protective measures. 
(1) the slot cable tray should be above the corrosive liquid pipeline. 
(2) the trough cable tray should be under the thermal pipe. 
(3) when the flammable and explosive gas is heavier than the air, the trough cable tray should be above the pipeline. 
(4) when flammable and explosive gas is lighter than air, the trough cable tray should be under the pipeline. 
(7) the minimum distance between the trough cable tray and the pipe can be found in the relevant standard. 
(8) the necessary spacing should be maintained between the integrated wiring cable and the nearby electrical equipment such as motors and power transformers which may produce high-level electromagnetic interference. 
The distance between the integrated wiring cable and the power cable shall comply with the provisions of Article 11.0.2 of the GB/T50311-2000 specification. 
(9) the spacing between the integrated wiring cables, optical cables and pipelines laid on the wall and other pipelines shall comply with the provisions of Article 11.0.2 of GB/T50311-2000 Code. 
10) when the trough cable tray is laid horizontally, the best span should be selected according to the load curve, and the span is generally 1.5 to 3.0m. 
When laying vertically, the fixed distance should not be more than 2m. 
1. The bridge system should have reliable electrical connection and grounding (for metal bridges only). 
2. When allowing the use of the bridge system to form a grounding trunk circuit, the following requirements shall be met. 
The connection resistance between the ends of the bridge should not be more than 0.00033 ohms, and the insulation coating should be removed from the grounding hole. 
In the direct grounding system of 1KV and below neutral point, the grounding of the powered equipment is connected with the neutral grounding of the system. 
When the power supply is dynamically cut off, the metal cross-sectional area in the long direction of the bridge should not be less than the specified value. 
3. When another grounding line is laid along the full length of the bridge, each section (including non-straight line) should be reliably connected with the grounding line at least one point. 
4. For the vibration place, a spring coil should be installed at the connection of the grounding part.