Roof lightning protection network wiring

For high-rise buildings, not only the roof of a high-rise building must be considered for lightning damage, but also the possibility of lightning damage on the sides of the building.
(1) Wiring
of roof lightning protection network     The roof lightning protection network is shown in Figure 20-29. For the first type of buildings
, Ll<10m, for the second type of buildings, L1<20m.