Neon and other noble gases require a high voltage to conduct electricity, so that normally current will not flow across them. However, a direct lightning strike (such as on a radio tower antenna)...
Lightning protection systems control electrical discharges by directing them through a low-resistance path to the ground, avoiding passage through parts of a structure and reducing risk of fire or...
I think your answer is given in previous question -( correct size of varistor across 24v coil)I am just pasting the same here. . ."When the voltage exceeds the clamping voltage of the varistor, it...