Lightning equipotential bonding for metal installations
In the case of an isolated external ESESystem, lightning equipotential bonding shall be established at
ground level only.
For an external ESESystem which is not isolated, lightning equipotential bonding shall be installed at the
following locations:
a) in the basement or approximately at ground level. Bonding conductors shall be connected to
a bonding bar constructed and installed in such a way that it allows easy access for
inspection. The bonding bar shall be connected to the earth-termination system. For large
structures (typically more than 20 m in length), more than one bonding bar can be installed,
provided that they are interconnected;