From the air terminal to the earth electrode — and everything the current passes through.
Lightning protection, earthing, electrical installation and the maintenance that keeps all three working. Find your scope below, or tell us the problem and we'll tell you which of these it is.
Lightning protection systems01 / 03
Not sure which of these your problem is?
Tell us the building and the symptom — we will tell you the scope, and what it will take to close it.