Connecting The Power Cords And The Ground Wire - 3Com Switch 4210 Series Getting Started

Connecting the Power
Cords and the Ground
Wire
Connecting the AC
Power Cord
Connecting the Ground
Wire
AC power source socket (recommended)
Use a single-phase three-wire power socket with a neutral contact or a general
purpose PC power socket, making sure that the neutral point is well connected to
building ground. Verify that the power source of the build is reliably grounded.
Figure 22 Power socket (recommended)
Neutral point Neutral point
Live line Live line
Zero line Zero line
Connecting the AC Power Cord
1 Connect one end of the chassis ground wire to the grounding screw on the rear of
the chassis and the other end to the ground as near as possible.
2 Connect one end of the power cord to the power input on the rear panel of the
chassis, and plug the other end to the AC power input of the power source.
3 Check whether the PWR LED on the front panel of the switch is ON. If the LED is
ON, it shows the power cord is properly connected.
CAUTION: Make sure that the ground wire has been properly connected before
powering on the switch.
CAUTION: Correctly connecting the switch ground wire is crucial to the lightning
protection and electromagnetic susceptibility (EMS) of your switch.
The power input end of the switch is connected with a noise filter, whose central
ground is directly connected to the chassis, forming the chassis ground (commonly
known as PGND). This chassis ground must be securely connected to the earth
ground so that the faradic current and leaking electricity can be safely released to
the ground, enhancing the EMS capability of the switch. Ground your switch as
follows:
1 When a grounding strip is available at the installation site, attach one end of the
yellow/green ground wire of the switch to the grounding screw on the grounding
strip and fasten the captive nut.
Note: The fire main and lightning rod of a building are not suitable for grounding
the switch. The ground wire of the switch should be connected to the grounding
device for the equipment room.

Connecting the Power Cords and the Ground Wire

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