What are the standard requirements for the fixed lashing of cables when cables are laid in long vert

When the cable tray is installed indoors, in order to ensure that the cable tray is straight and beautiful, neat and consistent, its horizontal load deformation should generally be controlled. According to the size of the load deformation in the horizontal direction of the selected cable tray and the required bridge in the horizontal direction, check the bridge load characteristic curve of the corresponding structural form, and when the deformation requirement cannot be met, the side height of the bridge frame can be appropriately increased or the support spacing can be reduced, so as to meet the requirements.

The cable tray is stamped with thin steel plates. Its carrying capacity has a certain limit. Otherwise, serious deformation will occur due to overloading of the bridge.

It affects the aesthetics of the tray and the safe operation of the cable. Usually the load-bearing capacity of the cable tray is expressed by the load characteristic curve of the cable tray.

The magnitude of the load capacity of a cable tray is a quantity related to the size of the cable tray and the support distance. Corresponds to the same support distance and the amount of flexural and convex deformation. The bearing capacity of the bridge with large side height is large, and the bearing capacity of the bridge with small height is small.

In addition, when the load capacity is the same, for the same specification of cable tray. The amount of bending deformation is smaller than that of those with a small support distance. In general, the cable tray is installed with a set of support frames at regular intervals.

1. The cable of the ** slot can not be tied, the cable in the slot should be straight, the cable in the slot should be straight, try not to cross, the cable should not overflow the trunking, and the cable should be tied and fixed at the turning point of the cable in and out of the trunking. Vertical trunking cables should be fixed to the cable bracket every meter apart.

2. When laying wires in horizontal and vertical trays and vertical trunking, the cables should be tied. 4 pairs of cables should be bundled with 24 cables, and 25 pairs or more of trunk cables, optical cables and other signal cables should be bundled according to the type, diameter and number of cable cores. The spacing between the lashing should not be greater than meters, the spacing between the buckles should be even, and the tightness should be moderate.

1. When the cable is laid in the vertical shaft tray, the cable should be neatly arranged in the bridge and fixed on the beam in the tray.

2. The fixed arrangement should be carried out in an orderly manner, and there should be identification to check, and the fixed interval should be less than or equal to.

The rungs of the same layer of each cable bracket should be on the same horizontal plane, and its height deviation should not be greater than 5mm.

The cable bracket should be installed firmly, horizontally and vertically. The rungs of the same layer of each cable bracket should be on the same horizontal plane, and its height deviation should not be greater than 5mm. Cable supports installed in a cable trench with a slope or in a building should have the same slope as the cable trench or building.

The minimum distance from the rungs of the cable bracket to the top of the trench, the floor or the bottom of the trench.

When the bracket is embedded, it is necessary to ensure that the bracket base and the concrete of the masonry wall are fully occlusive, dense, and maintain a right-angle state with the fixed wall, so as to ensure the stressed area of the base and avoid distortion. When laying cables, it is advisable to use top-down laying, and when dragging cables, it is advisable to drag horizontally.

The cable binding and fixing is unified with plastic-plated black binding wire, which should be fixed firmly, the fixed spacing of the control cable is 800 mm, the fixed spacing of the power cable with a small cross-section is the same as that of the control cable, and the fixed spacing of the power cable with a large cross-section is meters.

The cables in the horizontally laid bridge generally do not need to be fixed, and can be laid naturally.

The cable in the bridge of the vertical laying section needs to be matched with the line card, and the cable is fixed one by one with a rope (mostly with a single insulated wire), and the fixed spacing should comply with the regulations.

Vertical trays, also known as ladder frames, have special cable fixtures. Now supertall buildings also use pre-branch cables, which have suspended steel ropes and are suspended at the top.

What are the standard requirements for the fixed lashing of cables when cables are laid in long vertical trays?

The cable is laid in a long vertical tray, what are the standard requirements for the fixed binding of the cable? Hello dear, 1The bridge must be designed according to the direction of the drawings and the architectural characteristics of the site, such as elbows, saddles, lengths, etc.

2.The bridge installation must be horizontal and vertical. 3.

The installation of the bridge must be based on the size of the bridge and accurately calculate the force of the supporting point. It is required to be uniform, neat and beautiful, firm and reliable. 4.

The angle bend must have sufficient curvature to prevent the electric noise cable from being disassembled. 5.The bridge must be at least grounded at both ends of the grounding protection, required every 20m grounding, if there is no clear how to ground the point on the drawing, it is recommended to add a BV16 square millimeter two-color virtual ground wire in the bridge.

Answer]: a, b, c

This question examines the construction of power cable lines. High-voltage and low-voltage power cables, strong current and weak current control cables should be arranged in layers and sliding in order, and generally should be configured from top to bottom; Power cables and control cables should not be configured on the same layer of support; AC three-core power cable should not exceed 1 layer on the ordinary support and hanger, and should not exceed 2 layers on the bridge.

The net distance between the cable trench cable and the thermal pipeline and thermal equipment should not be less than 1m when laid in parallel, and should not be less than when crossed; When conditions are restricted, thermal insulation protection measures should be taken for disturbance.

Answer]: A This question assesses the requirements for laying cables in cable trays and trenches. The cable tray and the cable in the trench shall meet the following requirements:

Power lines, signal lines, and speaker wires should not be laid parallel to the groove. When the design requires, it shall be deployed according to the design requirements; The cables should be arranged neatly, not twisted, and crossed as much as possible; The intersection should be a thick line at the bottom and a thin line at the top; In addition to the design requirements, the Heng Ming cable should be classified and tied; When the cable is laid vertically, the upper end of the cable should be fixed on the bracket of the ** slot every 1 5m interval. When laying horizontally, lashing points should be set every 3 5m intervals.

Lashing fixing points should be set at the beginning and end of the cable and 300 500mm on both sides of the turning center point.

Summary. 2.The type of cable should be selected according to the laying method and environmental conditions. Armored cables should be used for buried laying) When the unarmored cable is selected, it should be waterproof and anti-corrosion. Unarmored cables should be used for overhead laying.

What should be the laying cable, what should be the lashing, pro, the laying cable should have:

1.The cable must contain all working cores and cores used as neutral or protective wires.

2.The type of cable should be selected according to the laying method and environmental conditions. Armored cables should be used for buried laying) When the unarmored cable is selected, it should be waterproof and anti-corrosion. Unarmored cables should be used for overhead laying.

3.The selection of the cable cross-section should be in accordance with the regulations, according to its long-term continuous load allowable current carrying capacity and allowable voltage offset determined.

4.The cable line should be buried or overhead laying, it is strictly forbidden to set up along the ground, and should avoid mechanical damage and medium corrosion.