Installation ManualH3C S7500 Series Ethernet Switches Chapter 4 Hardware Installation4-6z If there is no grounding strip and no grounding body can be buried, theAC-powered Ethernet switch can be grounded through the protection earth (PE)wire of the AC power supply. In this case, make sure that the PE wire of the ACpower supply has been well grounded on the side of the power distribution room orAC power transformer.Figure 4-5 Ground the switch through the AC PE wirez If no grounding strip is available and no grounding body can be buried, theDC-powered Ethernet switch can be grounded through the return (RTN) wire ofthe –48 VDC power supply. In this case, make sure RTN wire has been wellgrounded at the DC egress of the power distribution frame (PDF).Figure 4-6 Connect the grounding cable to the PGND strip of the PDF4.6 Connecting Power Cables4.6.1 Connecting the AC Power CordCaution:For lightning protection, AC power supply should be led through the external lightningdevice into the S7500 series.Follow these steps to connect the AC power cord:
