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3.3 Grounding Cable Connection
The chassis of the equipment must be grounded properly so that the lightning can flow to
the ground, which improves the capability of the chassis for resisting the electromagnetic
interference.
1. Ensure that the grounding cable is connected correctly so that the equipment is
protected against lightning and interference. The correct connection of the grounding
cable is an important measure to ensure the human safety.
2. Connect the chassis to the ground by using a grounding cable. The grounding resistance
must be smaller than 0.10 ohms and the gauge of the grounding cable must be no less
than 18 AWG and the length is 50 cm.
3. The ground installed screw shall comply with 3.5mm minimum in nominal thread
diameter, and engage at least two complete threads into metal chassis with appropriate
fixing hardware like washer.
4. The grounding cable shall not be removed during normal operation, servicing or
maintenance.
5. Installation steps:
Step 1: Ensure the detachable power supply cord is removed.
Step 2: Use the screwdriver to turn the screws on the earth ground screw point.
Step 3: Strip one end of the ground wire to the ground hole of system.
Step 4: Connect the other end of the ground wire to a suitable grounding point of
building at your side.
Figure shows the grounding points.
Back panel
Mains Power
Switch
earth
terminal
Green/Yellow
Ground cable
1. 18 AWG min.
2. 50 cm
Building
Grounding point
