HP FlexFabric 12900 series Installation Manual page 26

CAUTION:
Make sure the AC power supply uses a three-wire cable with a protection wire, and the PE wire of the AC
power supply is well grounded at the power distribution room or AC power supply transformer side. In
addition, make sure the PE connector on the switch is well connected to the PE wire of the AC power
supply.
Figure 15 Grounding the switch through the PE wire of the AC power supply
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