11
Figure 12 Ground the switch by burying the grounding conductor into the earth ground
(1) Grounding screw (2) grounding cable (3) Earth ground
(4) Joint (5) Grounding conductor (6) Chassis rear panel
Grounding the switch with the PE wire of an AC power supply
If the installation site has no grounding strips or earth ground, you ground an AC-powered switch through
the protective earth (PE) wire of the power cord, and check that the following conditions are met:
• The power cord is a three-wire power cord that provides a PE terminal.
• The ground contact in the power outlet is well 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
the grounding system.
Figure 13 Ground through the PE wire of the AC power supply
(1) Three-wire AC power cable (2) Chassis rear panel
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