bet体育足球

Cable tray installation requirements and specifications
Source: Release Time: 2016-07-19 10:32 2088 Views Size: 16px 14px 12px

I. As a supporting project of the wiring project, the cable tray has no special specification guidance at present. The specifications of the manufacturers lack generality. Therefore, the design selection process should be reasonably selected according to the type and number of cables in each weak current system. Applicable bridge.

(1) Determine the direction: According to the plan of the building,

I. As a supporting project of the wiring project, the cable tray has no special specification guidance at present. The specifications of the manufacturers lack generality. Therefore, the design selection process should be reasonably selected according to the type and number of cables in each weak current system. Applicable bridge.

(1) Determine the direction: Determine the optimal route of the cable bridge according to the building plan, combined with the installation of air-conditioning pipelines and electrical pipelines, convenient maintenance, and the denseness of cable routing. Indoors, it should be erected along the walls, columns, beams and floors of the building as far as possible.If it is erected by a comprehensive pipe gallery, it should be erected in parallel on one side or above the pipeline, and the downline and branch line should be considered to avoid crossing as much as possible If there is no other pipe rack to borrow, you need to set up (support) columns by yourself.

(2) Load calculation: Calculate the weight of the cable per unit length in the longitudinal section of the cable tray backbone.

(3) Determine the width of the bridge: determine the type and specification of the cable bridge, the length of the support arm, the length and distance of the pillars, the width and number of layers of the bridge according to the number of cables, cable diameter and cable spacing.

(4) Determine the installation method: determine the fixing method of the bridge according to the setting conditions of the place, choose the hanging type, vertical type, side wall type or hybrid type, and the connectors and fasteners are usually supplied. In addition, according to the bridge Select the corresponding cover for the structure.

(5) Draw a flat and cross-sectional view of the cable bridge, and a space map should be drawn for the local part, and the material table should be listed.

2. If it is used together with the power cable bridge, the power cable and the low-voltage cable should be straight on one side with a partition in the middle. Third, when the weak electric cable and other low voltage cables are used in the bridge frame, the selection of the weak electric cable of the weak electric system with the outer shielding layer should be strictly implemented to avoid mutual interference. Fourth, cable bridge installation requirements

(1) When a trough-type long-span cable bridge enters a building from outside, the slope of the bridge outward shall not be less than 1/100.

(2) When the cable bridge and electric equipment cross, the clear distance between them is not less than 0.5m.

(3) When two sets of cable trays are laid in parallel at the same height, the clear distance between them is not less than 0.6m.

(4) Draw the route of the bridge on the parallel diagram, and indicate the coordinates or positioning dimensions and elevations of the starting point, the end point, the turning point, the branch point, and the lifting point of the bridge. If you can draw the side view of the laying axis of the bridge, calculate the material statistics. Will be more precise. Straight line segment: indicate the full length, the number of layers of the bridge, the elevation, model and specifications. Turning points and branch points: indicate the model and specifications of the turning adapter used. Lifting section: Indicate the change in elevation, and it can also be expressed in a local large sample map or section view.

(5) Bridge support points, such as columns, brackets or non-standard supports, the spacing of the frame, installation methods, model specifications, and elevations, can be agreed to be listed on the plane, or can be marked in sections with different sections, single lines Figure or large sample diagram.

(6) The position and method of cable down point. Generally speaking, a large number of cables can be guided by vertical bent joints and vertical shelves, and a small amount of cables can be guided by a guide plate or a tube. Specify the method of cable down.

(7) The cable bridge should be more than 2.2 meters above the ground, the top of the bridge should not be less than 0.3 meters from the ceiling or other obstacles, the width of the bridge should not be less than 0.1 meters, and the fill rate of the cross section in the bridge should not exceed 50%.

(8) When the cables in the cable tray are laid vertically, the upper end of the cable and the interval of 1.5 meters should be fixed on the support of the bridge.When laying horizontally, at the beginning, end, turn of the cable and every 3 to 5 intervals The meter is fixed.

(9) When installed in a suspended ceiling, the opening surface of the slot cover shall maintain a vertical clearance of 80 mm, and the utilization ratio of the section of the trunk shall not exceed 50%.

(10) The cables laid in the trough can be unbundled.The cables in the trough should be straight, and the cables in the trough should be straight and not cross as much as possible.The cables should not overflow the trough, and the cables should enter and exit the trough. Turns should be tied and secured. The vertical cable routing cables should be fixed on the cable support every 1.5 meters.

(11) When laying wires in horizontal and vertical bridges and vertical troughs, the cables should be bound. 4-pair cable is bundled with 24, 25-pair or more trunk cable, optical cable and other signal cables should be bundled and bundled according to cable type, cable diameter, and cable core number. The lashing distance should not be greater than 1.5 meters, and the distance between buckles should be uniform and moderately tight.

(12) When the bridge is laid horizontally, the support spacing is generally 1.5-3m, and the spacing fixed to the building structure when it is laid vertically should be less than 2m.

Welcome to Guangxi Nanning Gaoyao Power Equipment Co., Ltd.!
QQ online service