Wiring of lightning protection belts, voltage equalizing rings, etc. in high-rise buildings

Wiring of lightning protection belts and voltage equalizing rings
    Lightning protection belts and voltage equalizing rings should be installed between the floors of high-rise buildings,
connected to the roof lightning protection network, and connected to the grounding
device through down conductors, as shown in Figure 20-30. For the first type of building, L<12m (
area with strong lightning activity) and L<18m (area with normal lightning activity); for the second
type of building, L<24m.