##### Connecting GND Cable

###### Background Information

Normal GND connection of the Device is the important guarantee for Device lightning protection and anti-interference.

###### Procedure

1. Remove the ground screw on the Device and place it properly. Pass the ground screw through the round hole of the OT terminal of the ground cable. Turn the ground screw clockwise with a cross screwdriver to fasten the OT terminal of the ground cable.
2. Wind the other end of the ground cable into a circle with needle-nose pliers.
3. Connect the other end of the ground cable to the ground bar, turn the hex nut clockwise with a wrench to fasten the other end of the ground cable to the ground terminal.
   Figure 1 Connect GND

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