Cable tray is a product for protecting cables, which can be erected independently or laid on various buildings (structures) and pipe rack supports, reflecting the characteristics of simple structure, beautiful appearance, flexible configuration, convenient maintenance, etc.
The material of the galvanized bridge is "electro galvanizing", which involves placing the steel plate into an electroplating solution (containing zinc oxide) after chemical cleaning. After being energized, zinc molecules are ionized and attached to the surface of the steel plate to form a galvanized bridge.
The grounding jumper wire is used for electrical auxiliary connection of the disconnection interface between various sections of the cable duct of the bridge, which serves as a conductive potential and does not pass through current normally.
Because the galvanized cable tray is made of metal materials with conductivity, the jumper wire of cable tray is used at the connection of two cable trays to protect against leakage. Galvanized connection plates can be used as jumper wires between galvanized bridge trays, connecting the bridge trays into a whole. Two connecting bolts at both ends of the connection plate are added with galvanized layered bridge trays for installation. The upper layer is installed first, and then the lower layer. The distance between the upper and lower layers should be left with margin, which is conducive to cable laying and maintenance in the later stage. Connect all cable trays to prevent personal harm caused by leakage caused by the cable tray not being connected to other cable trays. Eventually, a grounding wire will connect each section of the cable tray to the ground.
Galvanized bridge jumper requirements:
When another grounding main line is laid along the whole length of cable tray, at least one point of each cable tray (including non straight line section) shall be reliably connected with the grounding main line.
The cable tray system shall have reliable electrical connection and grounding (only for metal tray).
When it is allowed to use the cable tray system to form the grounding trunk circuit, the following requirements shall be met. The connection resistance between the ends of cable tray shall not be greater than 0.00033 Ω, and the grounding hole shall be insulated. In the 1KV and below neutral point direct earthing system, the grounding of the receiving equipment is connected with the system neutral line grounding. When installing the automatic cut-off power supply device, the metal cross sectional area of the cable tray in the direction of the grade length shall not be less than the specified value.
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