Ultimately, the end state is to have a communication site that employs equipment and antenna protection from both lighting and power ground faults.
I wish to deploy a transportable shelter (on wheels) that includes a telescoping (67 foot) tower. The question raised is "What minimal grounding can I implement in an effort to reduce site prep (trenching, drilling for ground rods, etc)?
The context of answering this question is around two standards; MIL-STD-188 "Grounding, Bonding and Shielding" and Motorola R56 (a standard that the shelter manufacturer is accustomed to following.
As an engineer with liability at stake for making a "minimum grounding" recommendation, I am somewhat hesitant to make a recommendation or support any quick install counterpoise and a few ground rods.
The nice thing about standards is that there are so many...
From others, suggestions range from a simple triad ground. Another suggestion is radials. Yet a third suggestion is a second down conductor. What?
So the MIL standard outlines requirements for earthen resistance, conductor size, minimum counterpoise locations, spacing of ground rods etc. However, such requirements define the MINIMUM CONFIGURATIONs.
Does it not all come down to "resistance to earth"? You can follow minimum configuration standards until the cows come home. Until you can meet the resistance to earth metric, you just don't have the earthen ground system needed to contend with lightning. NO?
As an engineer recommending the standard and methods for obtaining the earth resistance, I suspect that the soil conditions will make it extremely difficult to achieve the necessary earthen resistance. This leaves me with the dilemma of; No matter how I engineer it, it is likely to fall short of providing the protection needed.
What would you do?