Galvanized steel cable trays construction method

Galvanized steel cable trays construction method

In the process of galvanized cable trays construction: construction methods and technical measures, cable tray installation, grounding treatment, multi-layer cable containments installation and so on

1. Measurement and positioning

Use the bullet line method to mark the installation position of the bracket or strut channels, determine the fixed position of the bracket and mark it well. The positioning of the cable tray in the shaft should be determined first with the suspended wire method to determine the installation baseline, if the reserved hole is not suitable, it should be adjusted in time, and make a good repair.

2. Bracket production and installation

According to the construction drawing design elevation and cable trough specifications, positioning, and then according to the measured size to make bracket, bracket for factory production. In the place without suspended ceiling or suspension bracket along the bottom of the beam or against the wall bracket installation, in the place with suspended ceiling in the suspended ceiling or against the wall bracket installation. In public places without suspended ceilings, the brackets are installed against walls and columns or on the lower chord of the roof frame, taking into account the beauty of the building and the convenience of maintenance.

3. Metal cable tray  installation

For the special shape of the galvanized cable tray or aluminium cable tray, the dimensions measured on site will be handed over to the material supplier, who will make the steel cable tray according to the dimensions to reduce on-site processing. Cable trays material, type, thickness and cable accessories meet the design requirements.

4. Grounding treatment

Galvanized cable containments can be connected to each other by using galvanized connecting plates as jumper wires to connect the cable trays together. In the connection plate or splice plate at both ends of the two connecting bolts with galvanized spring washers, between the steel cable trays with not less than 4mm2 soft copper wire for jumper, and then the cable channels and grounding wire connected to form an electrical pathway.

5. Multi-layer cable channel installation

Layered cable channels installation, first install the upper layer, then install the lower layer, the distance between the upper and lower layers to leave a margin, conducive to later cable laying and maintenance.