Figure 6.19 Partitioning coefficient kc in the case of a meshed air-termination
system and a type B earth-termination system. kc ¼ 1/2n þ 0.1 þ 0.2 3
ffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi
(W=H)
p
, where n is the total number of down-conductors
(add internal down-conductors if they exist), w the spacing between
down-conductors and H the height (spacing) between horizontal
ring conductors.