Electrical systems that are grounded
shall be connected to earth in a manner that will limit the voltage
imposed by lightning, line surges, or unintentional contact with higher-voltage
lines and that will stabilize the voltage
to earth during normal operation.
Informational Note No. 1: An important consideration for limiting the imposed voltage is the routing of bonding and grounding electrode conductors so that they are not any longer than necessary to complete the connection without disturbing the permanent parts of the installation and so that unnecessary bends and loops are avoided.
Informational Note No. 2: See NFPA 780-2017, Standard for the Installation of Lightning Protection Systems, for information on installation of grounding and bonding for lightning protection systems.