Ji'nan cable bridge is mainly composed of glass fiber reinforced material and inorganic adhesive composite fireproof board and metal skeleton compound and other fireproof base material
The outer join fire retardant coating, so that the fireproof cable tray without burning fire, the fire spread a barrier, with a fire retardant effect is extremely good, but also has the fire resistance, oil resistance, corrosion resistance, non-toxic, no pollution, convenient installation, reasonable overall structure, long service life, and appearance, cable installed on the cable tray, the environment clean and tidy, convenient cleaning. Fire retardant coating has the characteristics of thin coating, high fire resistance and strong cohesion.
Earthing problem of cable bridge:
1, along the length of the bridge to lay the ground line, each paragraph (including non linear section) bridge should be at least a little reliable connection with the grounding trunk
2 the bridge system shall have reliable electrical connections and earthing (only for metal bridge)
3. For the vibration site, the spring shall be installed at the joint of the grounding part
4, when allowed using the bridge system composed of grounding line circuits should meet the following requirements. The bridge between end connection resistance should be less than 0.00033 ohm, grounding hole should remove the insulation coating at 1KV and below the neutral grounded system, electrical equipment grounding system with neutral grounding connected. A dynamic assembly when the power supply is cut off, the prefect direction of metal cross section bridge should be not less than the specified value.
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