What is the difference between a strong electric bridge and a weak electric bridge? Let's take a brief look:

1. There is no difference between strong and weak currents in the cable tray itself. It is the same as if you use this bridge to build strong electricity. If you use this bridge to run weak electricity, it is called weak electricity bridge. It is just a farewell in application. Their materials, specifications, colors, and installation methods are the same, and there is no difference in appearance.

2. However, there are certain requirements during the installation process. Strong and weak bridges are not shared in countless numbers, and are usually separated in design. Because the strong current will cause a strong magnetic field around the cable conductor to affect the weak current information when the power supply is strong, it is necessary to separate or configure a steel plate partition in the same bridge.

3. Normally, the specification of the weak current bridge is smaller than that of the strong current bridge, and the material and appearance are the same. But strictly speaking, when installing and using the bridge, the strong and weak electricity must be separated, and can not be placed in a bridge.

4. The cable bridge is used to run the cable. When the cable in the electrical installation is hidden (buried or walked on the floor, wall, etc.), galvanized steel pipes or plastic pipes are usually used as protective tubes. The bridge frame, for example, the three hundred control hoisting bridge frame under the plant beam, spraying the cable bridge frame, laying the cable on the bridge frame, the cable here does not require a protective tube (galvanized steel pipe or plastic pipe).

5. There are usually trapezoidal bridges, trough bridges and other materials such as hot-dip galvanized steel, electro-galvanized, plastic-sprayed, FRP, etc. At present, there is no specific specification guidance. The specification mode of each manufacturer lacks versatility. Therefore, the design and selection process should correctly select the practical bridge according to the cable type and number of each electrical system.

6. The cable bridge must comply with the following regulations:

The total length of the metal cable bridge and its support and hanger should be connected to the grounding main line in no less than two places. The two sections of the connecting plate between the non-galvanized cable bridges should be connected with copper core conductors or braided copper wires. The cross-section should not be less than 4mm. In order to prevent electrochemical erosion, bare copper conductors should not be used as the main grounding wire on the aluminum alloy cable bridge. The two ends of the connecting plate between the galvanized cable bridges may not be grounded jumper. But there should be no less than 2 each connecting plate The connection of the anti-loose nut or anti-loose washer is not changed. When the cable bridge is defrauded to form the grounding main circuit, the cable bridge and its support, hanger and connection plate should be able to receive the grounding barrier current and meet the requirements of thermal effects. The cable bridge as the grounding main line. The connection resistance between the tray and the end of the ladder frame should not be greater than 0.0003Ω.