Lightning and overvoltage protection
Equipotential bonding, or earthing, is used to avoid differences in voltage. According to VDE requirements, when low-voltage systems are constructed, protective measures must be taken to prevent electric shocks in buildings (DIN VDE 0100-540 and DIN VDE 0185-305). Here, for example, domestic installation PE conductors and foundation earths are collected on an equipotential bonding bar in order to balance out voltage differences. This is what an equipotential bonding bar does. The main equipotential bonding consists of a system of electrical connections between the main protective conductor, main earthing conductor, main water pipe, main gas pipe and other metal pipework systems. These systems and the earthing conductors for them should be connected with an equipotential bonding bar close to the main supply service, possibly in the service entrance equipment room.
The earthing bar is available in two sizes and has screw terminal connectors of different sizes for connecting PE conductors and other components.
The earthing devices are completed by earthing clips for galvanized copper and steel pipe for connecting metal pipes for water or heating supply. These are available with connection cross-sections between 2.5 and 16 mm² in various lengths.