H3C S5500-28C-EI Installation Manual

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H3C S5500-28C-EI Installation Manual Manual pdf 57 page image

Installation ManualH3C S5500-EI Series Ethernet Switches Chapter 3 Installation3-173.3.3 Connecting the Grounding CableCaution:Correctly connecting the grounding cable is crucial to lightning protection andelectromagnetic susceptibility (EMS).The power input end of the switch is equipped with a noise filter, whose central groundis directly connected to the chassis, forming the chassis ground (also known as PGND).This chassis ground must be securely connected to the earth ground so that thefaradism and leakage electricity can be safely discharged to the ground, enhancing theEMS capability of the switch. Ground your switch as follows:z When a grounding strip is available at the installation site, attach one end of theyellow-green grounding cable of the switch to the grounding terminal on thegrounding strip and fasten the captive nut. Note that the fire main and lightning rodof a building are not suitable for grounding. The grounding cable of the switchshould be connected to the grounding system in the equipment room.(1)(2)(3)(4)(1)(2)(3)(4)(1) AC power socket (2) Grounding terminal(3) Protection grounding cable (4) Grounding stripFigure 3-26 Ground the switch through a grounding stripz When there is no grounding strip but earth is available near the installation locationand allows a grounding body to be buried, hammer an angle iron/steel pipe longerthan 0.5 m (1.64 ft) into the earth. Weld the yellow-green grounding cable of theswitch onto the angle iron/steel pipe, and treat the joint for corrosion protection.