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Instructions for the use of power cable trays
Edit:Shan Dongfang Kai Polymer Materials Co., Ltd.   PublicDate:2019-07-30

    With the advancement of society, power supply is of great significance to human life, and it is necessary to ensure power stability. Transmission In addition to the strict requirements of cable materials, cable trays provide a full range of protection for cables. Power Cable Tray As a support and cable holder, power cable trays are used as long as the project requires cable laying. The importance of the power cable tray in the cable industry cannot be replaced. In addition to the function of transporting the wires, it also has the function of power transmission, which can effectively ensure the normal circulation of current.
    Instructions for use of power cable tray:
    1. Cable trays, trunkings and their hangers should be used in corrosive environments. Corroded rigid materials are manufactured or treated with anti-corrosion treatment. The anti-corrosion treatment should meet the requirements of engineering environment and durability. 2. In the section with fire protection requirements, the power cable tray can be closed or semi-closed by adding materials such as plates and nets with fire-resistant or flame-retardant properties to the cable ladder and tray. The structure is adopted, and measures such as applying fireproof coating on the surface of the bridge and its support and hanger are adopted, and the overall fire resistance performance should meet the requirements of relevant national standards or standards.
    3. In places where engineering fire protection requirements are high, aluminum alloy power cable bridges should not be used. 4. The choice of the width and height of the power cable tray should meet the filling rate requirements. The filling rate of the ladder ladder of the cable is generally 40% to 50% of the power cable. The control cable It may take 50% to 70%, and it is advisable to reserve 10% to 25% of engineering development margin. [5] When selecting the load level of the power cable tray, the uniform load of the cable tray should not be greater than the rated uniform load of the selected cable tray load level, if the cable tray is supported. When the actual span of the frame is not equal to 2m, the uniform load of the work shall meet the requirements.
    6, various components and hangers and hangers under the conditions of the corresponding load, the size of the specifications should match the straight section of the pallet, ladder frame, bend series. ;   7. When selecting the bend or lead-on or lower-off device of the power cable tray, it should not be less than the minimum allowable bending radius of the cable in the cable tray.