Dahua Technology D-SD6C3425XB-HNR-A-PV1, Руководство по установке

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Figure 2-2 Installing lightning protection devices outdoors
Table 2-2 Installing lightning protection devices outdoors
No. Description
1 Video lightning conductor.
2 Communication lightning conductor.
3 Power supply lighting conductor.
4
Impedance of the cable connected to the grounding wire should be less
than 4Ω.
5 The radius is 60 m.
6 Lightning conductor.
7 Steel tube.