Puestas a tierra

Table of materials accepted under current regulations:

For ESE lightning rod installations, the maximum resistance value is 10 ohms.

Yes, it is recommended to connect the two grounding systems to achieve an equipotential system throughout the facility.

Current standard indicates that "When the building or the protected volume has a foundation earth termination system for low voltage, the ESE earth termination systems should be connected to it with a standardised conductor (see EN 50164-2)."