Grounding The Switch With A Grounding Conductor Buried In The Earth Ground - HP 5120 EI Series Installation Manual

Figure 58 Make a grounding cable connector
Figure 59 Connect the grounding cable to a grounding strip
(1) Grounding post
(3) Grounding 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.
(2) Grounding strip
(4) Hex nut
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