Chapter 3 Grounding
3.1 Connecting the Grounding Cable
Grounding is used to quickly release overvoltage and overcurrent induced by lightening for switch,
and to protect personal safety. Select the appropriate grounding method according to your needs.
3.1.1 With Grounding Bar
If a grounding bar is available at the installation site, follow the steps below.
Steps
1. Connect one end of the grounding cable to the binding post on the grounding bar.
2. Connect the other end of the grounding cable to the grounding terminal of the device and fix
the screw.
Figure 3-1 Grounding with Grounding Bar
3.1.2 Without Grounding Bar
If there is no grounding bar but the earth is nearby and the grounding body is allowed to be
buried, follow the steps below.
Steps
1. Bury an angle steel or steel pipe (≥ 0.5 m) into the mud land.
2. Weld one end of the grounding cable to the angle steel or steel pipe and embalm the welding
point via electroplating or coating.
3. Connect the other end of the grounding cable to the grounding terminal.
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