Hi!
Generally, the grounding requirements of the equipment are as follows:
1. All the network telecommunications equipment including mobile base station, transmission equipment, switching equipment and office power should be grounded. All the protection grounds (PGNDs) of such equipment should be finally bonded to a general grounding bar. The PGNDs in an equipment room should be bonded to the general grounding bar in the same equipment room.
2. The PGND of the equipment should be connected to the nearby grounding bar (user-supplied). Copper-core conducting cable with green-yellow plastic insulation cover should be used. The cross-sectional area of the conductive cable is required to be 25 mm2 or wider.
3. The grounding terminals at the front door, back door and side panels of the cabinet should be separately connected to the grounding post of the cabinet. The cross-sectional area of the cable is required to be 1.6 mm2.
4. The metallic units of the equipment cabinet should have good conductance. Any nonconductive paint should be removed from the metal-to-metal contact.
5. The cabinets contact the adjacent cabinets in a row through the fixing bolts and washers on the cabinet top. A surface of 30 x 50 mm2 around the bolt holes should not be covered with paint. Rust-proof and rot-proof measures should be taken. The surface of the washer and nut should be plated with nickel to ensure good electrical conductance.
