ABC Book

Overhead wires air terminal system (for example the protective wire above the overhead High Voltage power distribution lines).

Joint designed and placed to facilitate electrical testing and measurement of Early Streamer Emission lightning protection system components. (NF C 17 102 : 2011).

Loud noise caused by lightning discharges, due to the air violent dilatation when the current flows into the lightning channel.

Storm caused by strong rising air currents and characterized by thunder and lightning and usually heavy rain or hail. There are two type of thunderstorms: convective type (local high temperature variation and humidity) and frontal type (massive temperature and humidity cells meeting).

The initial corona effect converts into an upward streamer due to the intensification of the electrical field.