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The installation of large-span cable trays must comply with regulations

2025-04-08
Latest company news about The installation of large-span cable trays must comply with regulations

1) Straight steel cable trays exceeding 30m in length and large-span aluminum alloy or fiberglass cable trays exceeding 15m in length should not have expansion joints. Compensation devices should be installed at the deformation joints of the cable trays crossing buildings.

 

2) The bending radius at the turning point of the cable tray shall not be less than the allowable bending radius of the cables inside the tray.

 

3) When there is no requirement in the design, the spacing between the supports for horizontal installation of cable trays is 1-5-3m, and the spacing between the supports for vertical installation is greater than 2m.

 

4) The bridge and bracket are securely fastened with bridge connecting plates and bolts, and the nuts are located on the outer side of the bridge. When fixing the bridge and steel bracket, there are mutual insulation measures to prevent electrochemical corrosion.

 

5) The cable tray is laid under the flammable and explosive gas pipelines and thermal pipelines.

 

6) Cable trays laid in vertical shafts and crossing different fire zones

 

7) When welding and fixing the bracket and embedded parts, the weld seam should be full and firm, and the anti loosening parts should be complete.

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The installation of large-span cable trays must comply with regulations
2025-04-08
Latest company news about The installation of large-span cable trays must comply with regulations

1) Straight steel cable trays exceeding 30m in length and large-span aluminum alloy or fiberglass cable trays exceeding 15m in length should not have expansion joints. Compensation devices should be installed at the deformation joints of the cable trays crossing buildings.

 

2) The bending radius at the turning point of the cable tray shall not be less than the allowable bending radius of the cables inside the tray.

 

3) When there is no requirement in the design, the spacing between the supports for horizontal installation of cable trays is 1-5-3m, and the spacing between the supports for vertical installation is greater than 2m.

 

4) The bridge and bracket are securely fastened with bridge connecting plates and bolts, and the nuts are located on the outer side of the bridge. When fixing the bridge and steel bracket, there are mutual insulation measures to prevent electrochemical corrosion.

 

5) The cable tray is laid under the flammable and explosive gas pipelines and thermal pipelines.

 

6) Cable trays laid in vertical shafts and crossing different fire zones

 

7) When welding and fixing the bracket and embedded parts, the weld seam should be full and firm, and the anti loosening parts should be complete.

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