Cable tray is a common tool and equipment used to protect cables. When using Jinan cable tray in many projects, due to lack of understanding of the use specifications and relevant knowledge, the equipment effect is often reduced. So, what do you need to know about the use of cable tray?
1. The support spacing of large load of cable tray device shall be less than the allowable load and support span.
2. When selecting the width of cable tray, certain spare space shall be reserved for the future use of cables.
3. When there are few power cables and control cables, they can be installed on the same cable bridge, but the power cables and control cables should be separated and laid by partitions.
4. When the cable tray is laid horizontally, the connector between the cable trays should be set at about 1/4 of the span as far as possible, the cable with horizontal direction should be fixed at about 2 meters, and the cable with vertical direction should be fixed at about 1.5 meters.
5. The cable bridge device shall be reliably grounded. If the cable tray is used as the main grounding line, the end of each layer of cable tray shall be connected (connected in parallel) with 16mm2 flexible copper wire to connect with the main grounding line. Long-distance cable tray shall be grounded every 30-50 meters.
6. In addition to shielding and protective cover, the cable bridge device shall be installed with protective cover on its top layer during outdoor installation to prevent the sun and rain. If welding and installation is required, the weld thickness around the weldment shall not be less than the thickness of the base metal, and the weld joint must be subject to anti-corrosion treatment. The filling rate of the cable in the cross section of the bridge: the power cable shall not be greater than 40%; The control cable shall not be more than 50%, and it can reach 60% for weak current lines.
In addition, certain spare space shall be reserved when selecting the width of the cable bridge, the cable bridge device shall be reliably grounded, and the cable bridge device shall be equipped with a protective cover on its top layer during outdoor installation.
The above is all the explanations about the precautions for the use of cable tray shared by Xiaobian. I hope it can help you more clearly understand the precautions for the use of cable tray. Come to our website if you need Ask!