What are the specifications and standards for cable tray installation?

During the installation process, it is difficult to control if the relevant professional cooperation and technical data of the relevant professional pipelines are not done in advance. The fill rate of the cables in the tray exceeds the specification value.

In the construction drawings, the most common only floor plan, even if there is a section is not very perfect, in accordance with the "steel cable tray engineering design code" article stipulates: its design content has:

1. Floor plan of the bridge system;

2. Relevant cross-sectional drawings of the bridge system;

3. The name and quantity of the pallet, ladder frame, straight section, bend, support and hanger required by the bridge system and the necessary description;

4. Non-standard technical descriptions or auspicious drawings with special requirements. Due to the imperfect design and other reasons, the local appearance of the placement of the cable too much, and even the phenomenon of full load, does not meet the provisions of the specification: the filling rate of the cable should not exceed the specified value of the relevant standard, the power cable 40, the requirements of the control cable 50.

In this regard, the supervisors should do a good job of pre-control measures, strictly require the construction unit to master the use of electrical engineering systems before purchasing the bridge, and make accurate statistics on the number of cables and cable sections in each bridge, and find that the specifications of the bridge should be changed in time with the design to effectively control the occurrence of quality problems.

1 General Provisions.

1 1 This chapter is applicable to the new and expanded general industrial and civil building cables, bridge installation and cable laying in the bridge 100 frame with a voltage of 10kV and below.

1 degree 2 cable tray installation and cable laying in the tray shall be constructed in accordance with the approved design documents.

1 3 The pallet (slot) or ladder frame straight section supported by the support, hanging, and bracket is combined, and the curved non-straight section is combined, and the rigid structural system with continuity of the cable is the cable tray.

The metal cable tray and its bracket and the metal cable duct that is introduced or led out must be grounded (PE) or zero (PEN) reliably and must comply with the following requirements:

1. The total length of the metal cable tray and bracket shall be connected to the grounding (PE) or zero (PEN) trunk at no less than 2 places;

2. The two ends of the connecting plate between the non-galvanized cable tray are connected to the copper core grounding wire, and the minimum allowable cross-sectional area of the grounding wire is not less than 4mm2;

3. The two ends of the connecting plate between the galvanized cable tray shall not be connected to the grounding wire, but there shall be no less than 2 connecting fixing bolts with locknuts or washers at both ends of the connecting plate. Genus.

1 5 It is strictly forbidden to have defects such as twisting, armor flattening, sheath fracture and serious scratches on the surface of cable laying.

1 6 If there is a place with fire protection requirements at the cable tray, fire isolation measures should be taken.

Cable Tray Width 100 1 100 Cable Tray Width 150 150 Cable Tray Width 400 400 Cable Tray Width 800 2 800 Cable Tray Width (Designated Brand) Trough Cable Tray Factory Direct Batch Specializing in cable tray design and manufacturing, quality assurance, ** low! The product has light weight and high strength.

04D701-3 "Cable Tray Installation" of the Ministry of Construction 2004-03-01, SHT 801-2000 "Cable Tray Installation Drawing".

A cable tray is a structural facility used to support, protect and install cables, and its installation standards and requirements are essential for the service life and operational safety of cables. The installation of cable tray should follow the national and local standards and specifications, such as GB50086 "Electrical Design Code", DL T5053 "Cable Tray Design Code", etc. When installing cable trays, you need to pay attention to the following:

First of all, reasonable selection and design should be carried out according to the number, size, weight and other elements of the cable to ensure the bearing capacity, stiffness and stability of the cable tray. Secondly, it should be ensured that the installation position, height, span, and support mode of the cable tray meet the requirements of the specification, so as to avoid problems such as uneven stress and excessive vibration of the wide ridge cable of the bucket caused by improper installation. In addition to this air infiltration, we should also pay attention to the special requirements of anti-corrosion, fire prevention, explosion-proof and other special requirements of the cable tray, and select appropriate materials and treatment methods.

During the installation process, it should be ensured that the welding, bolting, and wall fixing of the cable tray are carried out in strict accordance with the standards to ensure that it is firm and reliable. At the same time, attention should also be paid to safety issues in the construction process, such as the protection of operators, on-site order, etc., to ensure safe production. In short, the installation standards and requirements of cable tray involve many elements, and should be selected, designed and installed according to the actual situation, and the relevant specifications and standards should be strictly followed to ensure the safety and stability of the cable.