Grounding The Switch With A Grounding Conductor Buried In The Earth Ground - HP 3100-48 v2 Installation Manual

NOTE:
If the ground contact in the power outlet is not connected to the ground, report the problem and reconstruct
the grounding system.
Figure 13 Ground through the PE wire of the AC power supply
(1) Three-wire AC power cable
Grounding the switch with a grounding conductor buried in the
earth ground
If the installation site has no grounding strips, but earth ground is available, hammer a 0.5 m (1.64 ft) or
longer angle iron or steel tube into the earth ground to serve as a grounding conductor.
The dimensions of the angle iron must be at least 50 × 50 × 5 mm (1.97 × 1.97 × 0.20 in). The steel tube
must be zinc-coated and its wall thickness must be at least 3.5 mm (0.14 in).
Weld the yellow-green grounding cable to the angel iron or steel tube and treat the joint for corrosion
protection.
Figure 14 Ground the switch by burying the grounding conductor into the earth ground
(1) Grounding screw
(4) Joint
6
(2) Grounding cable
(5) Grounding conductor
(2) Chassis rear panel
12
1
2
3
4
5
(3) Earth
(6) Cassis rear panel