Ground Grid for a Building

[CuriousElectron]

Greetings,
For a new building having a large square footage, is there a code/standard value for the maximum allowed ground grid impedance? If Concrete Encased Electrode is used in addition to ground rods around the perimeter of the building, does a ground grid calculation typically done to arrive at a calculated resistance?

No ground wire would be installed for this arrangement, only CEE and ground rods would be used for the ground grid.

Thanks,
EE

 

[7anoter4]

For practical execution see:
NECA 331/2009 Standard for Building and Service Entrance Grounding and Bonding.
For calculation see:
ENA Engineering Recommendation EREC S34
BS 7430/2011 9.5.8.5 Structural steelwork
IEEE 80/2013 ch.14.6 Concrete-encased electrodes
THE USE OF CONCRETE ENCLOSED REINFORCING RODS AS GROUNDING ELECTRODES by E.J.Fagan and R.H.Lee