Cabinet grounding of Integrated Wiring System

CabinetBothGroundingIt must be insulated from the earth

There is no conflict between grounding and insulation. The earth refers to the electrical grounding professionally mentioned. the grounding of the computer room is also grounded. It is impossible to achieve absolute insulation because the earth is a conductor, but it is necessary to ensure that the distance between the electrical grounding and the grounding body of our computer room is more than 100. the grounding of the computer room cabinet is used for electrostatic grounding. If there is static electricity, it will be released from this grounding, and it cannot be connected with the Electrical Ground.

It is necessary to be insulated because the landlord of the electricity wants to use the building for lightning protection, and the voltage of the mine is very high. We don't know how high it is, so we can put it underground during discharge, if our grounding is connected with an electrical ground, the high voltage will be returned through the grounding body of our data center to damage our equipment room.

According to National Building Regulations, cabinets used in the Integrated Wiring System must be grounded, regardless of whether a shielded wiring system is used.

Currently, the grounding scheme commonly used in the Integrated Wiring System is to establish independent weak current grounding wires in the weak current equipment rooms, weak current rooms, and telecommunications rooms, the conductor is ground on the total grounding pile of the building together with other grounding wires to form a joint grounding Earth in the building.

In the same cabinet, there are usually several or even dozens of shield distribution frames. They should be connected to the ground using a star structure. The grounding of the shield distribution frame should be directly connected to the copper strip of the Cabinet to form a star grounding in the cabinet. We recommend that you use a mesh grounding wire of more than 6mm2, the high-frequency characteristics of cables are improved based on the characteristics of large surface area. To prevent short-circuit of the mesh grounding wire, plastic hoses should be installed outside the grounding wire.

Early shielded distribution frames use the front column in the cabinet as the bus bar. As this method is affected by the Cabinet quality, it may cause Grounding Connection failure. Therefore, this distribution frame is rarely seen.

In the telecommunications room, if there are multiple cabinets, the grounding wire should also be connected to the grounding pile of the Telecommunications room in a star-shaped structure. This grounding form requires the building to have as many good grounding points as possible. Make up for buildings that cannot meet this requirement with a honeycomb structure. The local network can be counterfeited using metal cable channels, double floors, or parallel copper wires. The additional ground wire can reduce the size of the grounding circuit and weaken the interference signal. However, such a prevention structure should be designed in connection with strong electricity regulations and security solutions.

Each cabinet should be connected to the grounding copper strip of the data center using a grounding wire, and ensure that the grounding resistance of the distribution frame to the ground is less than 1 Ω. The grounding of the shielded wiring system should be completely separated from the strong electrical grounding and connected separately to the grounding bus at the bottom of the building.