1, cable tray system should have a reliable electrical connection and grounding (only on the metal bridge).
2, when allowed to use the cable tray system composed of grounding line circuits should meet the following requirements. Between the end of the cable connection resistance should be less than 0.00033 ohm, grounding hole should remove the insulating coating. In the 1KV and the following neutral point direct grounding system, the grounding of the electric equipment is connected with the grounding of the neutral grounding system. A dynamic assembly when the power supply is cut off, the prefect direction of metallic cross-sectional area should not be less than the specified value.
3, for the vibration place, in the grounding part of the connection of the device spring ring.
4, along the cable tray full-length other laying ground lines, each (including non straight line segments) cable tray shall be at least a little and grounding line connection is reliable.
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