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Figure 11 Attaching a ring terminal to the grounding cable
Connect the ring terminal to the grounding post of the grounding strip, and fasten it with the
4.
removed hex nut.
Figure 12 Connecting the grounding cable to a grounding strip
4
(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 a minimum of 50 × 50 × 5 mm (1.97 × 1.97 × 0.20 in). The
steel tube must be zinc-coated and its wall thickness must be a minimum of 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.
1
3
2
(2) Grounding strip
(4) Hex nut
11
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