What is lightning equipotential bonding?
The lightning equipotential bonding can be explained as bonding of conducting parts to the Lightning Protection System either by connecting them directly or through Surge protection devices in order to reduce the differences in potential caused during the lightning strikes. This prevents from dangerous sparking that may occur between the external Lightning Protection System and other components.
Metal installations like gas pipes, water pipes, air pipes, heating pipes, shafts of lifts, crane supports etc. shall be bonded together and to the LPS at ground level.
Lightning equipotential bonding should be integrated and coordinated with other equipotential bonding in the structure as shown in the picture above.
When the building height exceeds 30m, equipotential bonding is performed at 20m level height and also at every 20m above that. That is, on such cases the external down conductors, internal down conductors and metals parts are to be bonded.
The conductors used for bonding to the earth-termination system should meet the cross - sectional area requirements as specified by IS/IEC 62305 - part 3 and is independent of class of Lightning Protection system.
Follow Us