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Installation requirements for wiring in power cable tray construction
Edit:Shan Dongfang Kai Polymer Materials Co., Ltd.   PublicDate:2019-08-23

    Cable Bridge is not only eye-catching, but also rarely noticed But it is an indispensable part of the entire wiring project. So what is the installation requirement for the wiring of the power cable tray during construction?
    1. When using the power cable tray wiring indoors, the cable should not have other pro-flammable materials or jute outer sheath.
    2. The power cable trays can be laid without any spacing in the tray, but they are not allowed to be twisted together. The filling rate in the tray should not be more than 40% of the cross-cut mask.
    3, power cable bridge should not be laid above the heat pipe and should not be laid in places with corrosive gases.
    4. Use power cable tray wiring in particularly humid or corroded places, need to use corresponding protective measures according to different corrosive media, should choose to use plastic sheathed cable.
    5, when it is installed horizontally, the height from the ground is generally not required to be 2. 5m low, when installing vertically, the part below the ground height of 1.8m should be added with metal cover protection.
    6, multi-layer disassembly installation, the upper tray is not less than 0. 3m from the top plate (the ceiling). 7. The cable laid by the power cable bridge shall be marked with the cable number, model specification, length, start and end points, etc. at the first and last ends and every 50m.
    8. Cable bridges should be segmented (100mm) as they pass through the building expansion joints.
    9. The metal cable tray should have good grounding (zero connection).
    10. Except in some places (electrical dedicated rooms, such as electrical shafts, power distribution rooms, technical layers, etc.). The wiring quality of the power cable tray is reliable and has national standard certification.
    For the installation of the cable tray, please refer to the JSJT-121 National General Building Standard Design-Electrical Equipment Standard Atlas "Cable Bridge Installation" 04D701-3 issued by China Building Standard Design and Research Institute.

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