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Installation of metal cable trays

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Installation of metal cable trays

作者: Release Date: 2019-10-25 Author: Click:

The length of the straight steel cable bridge is longer than 30m, and the length of the aluminum alloy or glass fiber reinforced plastic cable bridge is 15m. Elastic joints are provided; the cable bridge is provided with compensation equipment across the deformation joints of the building; when no planning is required, the bracket of Baotou cable bridge horizontal device The distance is 1.5 ~ 3m; the distance of the bracket of the straight device is not more than 2m;


The bolts between the Baotou cable bridge and the bracket, and the bridge connecting plate bolts are fastened without loss. The nuts are located on the outside of the bridge. When the aluminum alloy bridge and the steel bracket are fixed, there is a method to prevent galvanic corrosion between them.


In addition to the above requirements for metal bridges, we also need to make the installation safer according to the following 4 rules!


The metal cable tray and its support and the incoming or outgoing metal cable conduit must be grounded (PE) or connected to zero (PEN) securely, and it is necessary to sign the following rules:


1. The total length of the metal cable tray and its support should be no less than 2 connected on the ground (PE) or zero (PEN) trunk line;


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2. The two ends of the connection plate between the non-galvanized cable bridges are connected to the copper core ground wire. The ground wire is relatively small and the cross-sectional area is not less than 4mm2.


3. The two ends of the galvanized cable bridge connecting plate do not cross the ground wire, but the two ends of the connecting plate have no less than two connection fixing bolts with a lock nut or a lock washer.


4. The laying of cables is forbidden from shortcomings such as twisting, flattening of the armor, cracking of the sheath and severe scratches on the exterior.


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Keywords: Baotou cable tray

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