HP 5120 SI Series Руководство по установке - Страница 17
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Figure 14 Making a grounding cable connector
Figure 15 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 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.
(A)
1
3
3
4
(B)
2
(2) Grounding strip
(4) Hex nut
13
(A)
(B)