HP 5120 SI Series Installation Manual - Page 18
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Figure 16 Grounding the switch by burying the grounding conductor into the earth ground
(1) Grounding screw
(4) Joint
Grounding the switch by using the AC power cord
If the installation site has no grounding strips or earth ground, you ground an AC-powered switch
through the 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 17 Grounding through the PE wire of the AC power cord
(1) Three-wire AC power cord
NOTE:
To guarantee the grounding effect, use the grounding cable provided with the switch to connect to
the grounding strip in the equipment room as long as possible.
6
1
(2) Grounding cable
(5) Grounding conductor
2
(2) Chassis rear panel
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1
2
3
4
5
(3) Earth
(6) Chassis rear panel