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Raised floor, In the process of continuous development and renewal of electrical safety technology, it is noticed that a great deal of electrical accidents are caused by excessive potential difference. In order to prevent all kinds of electrical accidents caused by excessive potential difference, since twentieth Century 60 years, the application of equipotential bonding technology has been promoted internationally, and equipotential bonding has been used in new buildings. Thus, the appearance of the potential of the hexahedron of the computer room successfully solved the above problems.

Hexahedral equipotential earthing of machine room:
The upper, lower, left, right, front and rear faces of the machine room are all metal structures (forming a whole shielding space), and all of them are connected reliably and grounded through one or more points.
Computer room equipotential grounding box; equipotential connection, international attaches great importance to action potential connection, the electrical safety (safety), and lightning protection of electronic information equipment normal operation and safe use, it is necessary to. According to theoretical analysis, the smaller the range of equipotential bonding, the safer the electrical. Concrete construction: the metal component used in the decoration of the computer room is made of plastic copper wire and connected to the equipotential earthing box.
Implementing measures:
1, laying equipotential equipotential pressure belt, in the machine room laying grid type uniform pressure belt, the grid size is about 3M * 3M, material with 40 * 4mm galvanized steel plate, with Phi 8 insulators as support;
2, laying the corner position of bus in each room near the post, set about the two busbar, specifications for 80 * 8mm (four pieces of galvanized steel galvanized steel plate welding), 20 cm long, busbar welding and column reinforcement, the average pressure belt and equipotential connection bus. The power supply PE wire, the equipment shell, frame and other conductive metal objects in the engine room are connected with the bus or equipotential equipotential belt at the same time. The connecting line adopts 25mm2 multi strand copper core wire and galvanized steel plate.
3, laying the grounding grid, laying in the ground deep 1.5M, cross-sectional area of about 4M2 of the grounding grid, grounding grid and the machine room, such as potential voltage with galvanized steel plate connection.
Grounding line laying requirements:
1) grounding should be away from the room where the main building is about 3~5m; 2) digging depth of about 0.8M, 2M long, 2M wide trench in the ground, as shown above, in the location shown uniform placement of 9 bars of 1.4M 2 "(galvanized pipe into a trench about 600mm), and then at about from the ground at 800mm and 300mm respectively welded 12 40*4 galvanized steel; 3) leads to a 40*4 welding of galvanized steel plates in the galvanized plate, the ground is about 1M as a ground connection, the test point; 4) in the grid when welding, the welding area should be more than 6 times the contact and solder joints to prevent corrosion rust treatment; 5) soil by laying resistance reducing agent method (salt, and water) to increase the conductivity and the grounding resistance less than 2 ohm; 6) must be a new backfill clay conductive state better;