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 4 Ω.
5
The radius is 60 m.
6
Lightning conductor.
7
Steel tube.
Figure 2-3 Installing lightning protection devices outdoors (2)
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R: The radius of the circle, and R = 60 m.
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L1: The length of the pole that holds the lightning conductor.
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L2: The length of the rail that holds the Device.
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H: The length of the lightning conductor.
To get the value of L1, you need to use the formula:
6
