H3C Technologies H3C S10500 Series Switches - Manual (Page 27)

17
Grounding the switch through the PE wire of an AC power
supply
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 reliably grounded at the power distribution room or AC power supply transformer side.
In addition, make sure the PE connector on the switch is reliably connected to the PE wire of the AC power
supply.
If the switch is AC powered and no grounding strip is available at the installation site, you can ground
the switch through the PE wire of the AC power supply, as shown in Figure 13 .
Figure 13 Grounding the switch through the PE wire of the AC power supply
Grounding the switch through the RTN wire of a DC power
supply
CAUTION:
Make sure the RTN wire is reliably grounded from the DC egress of the DC power cabinet.
If the switch is powered by a –48 VDC power supply and no grounding strip is available at the
installation site, you can ground the switch through the return (RTN) wire of the DC power supply, as
shown in Figure 14 .