24
Grounding the switch by using the AC power cord
If the installation site has no grounding strips, you can ground an AC-powered switch through the protective
earth (PE) wire of the power cord, but must make sure:
The power cord has a PE terminal.
The ground contact in the power outlet is securely connected to the ground in the power distribution
room or on the AC transformer side.
The power cord is securely connected to the power outlet.
NOTE:
If the ground contact in the power outlet is not connected to the ground, report the problem and reconstruct
the grounding system.
Figure 31
Ground through the PE wire of the AC power cord
1
2
(1) Three-wire AC power cord
(2) Chassis rear panel
Connecting the power cord
CAUTION:
Before powering on the switch, you must connect the power cord and make sure the switch is well
grounded.
Connecting an AC power cord to the switch
To connect the AC power cord:
1.
Wear an ESD-preventive wrist strap, and make sure the wrist strap makes good skin contact and is
well grounded.
2.
Connect one end of the AC power cord to the AC-input power receptacle on the switch (see
Figure
32
).
3.
Connect the other end of the power cord to the AC power outlet.