3Com 4800G Getting Started Guide - Page 45

this case, make sure this PE wire is well connected to the ground at the power

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Connecting the Power Cables and the Grounding Cable 45 Figure 43 Ground the switch by burying the grounding body into the earth (2) (3) (1) (4) (5) (1) AC power socket (3) Protection grounding cable (5) Angle steel (2) Grounding terminal (4) Ground ■ For an AC-powered switch, if neither of the above-mentioned two conditions is available, ground the switch through the PE wire of the AC power supply. In this case, make sure this PE wire is well connected to the ground at the power distribution room or AC transformer side. Figure 44 Ground through an AC PE wire (1) (6) (2) (3) (5) (4) (1) AC power socket (4) PE wire (2) Grounding terminal (5) Three-core AC power cable (3) Power transformer (6) Ethernet Switch ■ For a -48 VDC powered switch, if none of the first two conditions mentioned above is available, ground it through the return (RTN) wire of the DC power

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Connecting the Power Cables and the Grounding Cable
45
Figure 43
Ground the switch by burying the grounding body into the earth
■
For an AC-powered switch, if neither of the above-mentioned two conditions is
available, ground the switch through the PE wire of the AC power supply. In
this case, make sure this PE wire is well connected to the ground at the power
distribution room or AC transformer side.
Figure 44
Ground through an AC PE wire
■
For a -48 VDC powered switch, if none of the first two conditions mentioned
above is available, ground it through the return (RTN) wire of the DC power
(1) AC power socket
(2) Grounding terminal
(3) Protection grounding cable
(4) Ground
(5) Angle steel
(1) AC power socket
(2) Grounding terminal
(3) Power transformer
(4) PE wire
(5) Three-core AC power
cable
(6) Ethernet Switch
(1)
(2)
(3)
(4)
(5)
(1)
(2)
(3)
(4)
(5)
(6)