What conditions should be met for the grounding points of the cable bridge system

1. The cable bridge system should have a reliable electrical connection and ground (only for metal cable Bridges).

2. The following requirements should be met when the cable bridge system is allowed to form the grounding circuit. The connection resistance between the ends of the cable bridge should not be greater than 0.00033 ohms, and the grounding hole should be cleared of insulation coating. In the 1KV and below neutral point direct grounding system, the grounding of the receiving equipment is connected to the neutral line grounding of the system. When the power supply is cut off at the installed place, the metal cross-sectional area of the stage length direction of the bridge should not be less than the specified value.

3. When the grounding trunk is laid along the full length of the cable bridge, each section (including the non-linear section) of the cable bridge should have at least one point of reliable connection with the grounding trunk.

4. For vibration sites, a spring ring should be installed at the connection of the grounding part.