The use of shielded cabling must meet the two conditions: "full shielding" and "shielding layer correct and reliable grounding". Full shielding, that is: wiring system used in the distribution frame, cables, connectors, patch cords, network equipment are shielded products, and shielding should be maintained between good connection and grounding. For shielded integrated wiring system, the main two ends of the ground, that is, in the shielded twisted cable at both ends (work area and telecommunications between the distribution frame) were grounded.
In the work area of the shield of the information outlet does not do special grounding, the work area through the shielded jumper will be shielded information outlet and shielded network equipment shield connection, naturally through the PE terminal of the power cord of the terminal equipment to achieve grounding.
Comprehensive wiring system grounding resistance should not be greater than 4 Ω. Directly related to the shielded wiring system grounding design is mainly concentrated in the distribution frame/cabinet side, the workspace shielded information outlets do not need to be connected to the equipotential bonding terminal board through the grounding entity. The reason is that the cabinet in the installation site has completed the equipotential bonding, both ends of the network equipment can be AC power supply through the protective earth (PE) to complete the equipotential bonding, so that the work area shielded information outlets through the shielding jumper and the equipment power supply PE wire connected to complete the grounding.
Grounding should be considered in the feeder room, telecom room, racks/cabinets in the server room, the cabinet grounding should be connected to the equipotential bonding conductor.