When this wire is cut then there is no need to even install the device.
If you truly took electronics in school then you know how to figure a parallel circuit. You also know that the total resistance of a parallel circuit will always be less than the smallest resistance in the circuit.
You know that in a series circuit that the total resistance will be all the resistances added together.
With someone in series with the earth the total resistance will be the human plus the earth and the total amount of the current will be through the human in or out of the water.
With a parallel circuit the human will only carry that portion of current that is not carried by the equipment grounding conductor but if that equipment grounding conductor is cut then the human becomes part of a series circuit and carries the blunt force of the faulted current.
This is basic electricity and is taught in the first semester of class.
What you seem to be saying is that current is trying to run to ground or earth which is far from the facts. All electricity follows the same laws of physics. Every electron involved in the circuit must return to its source weather it is through the low resistance of the equipment grounding conductor or the high resistance of earth.
When you cut the equipment grounding conductor and connect it to the driven rod you are forcing the fault current to flow through earth and when someone comes in contact with whatever that becomes energized that person must carry the entire faulted current.
On a side note I live in Piedmont North Carolina where we have several lakes within an hour’s drive from where I live. I have personally wired both private and commercial docks and many of them.
I am also very involved in the education field in both premises wiring (the wiring after the point of delivery from the utility) and electronics.
I am also very involved in the NEC and the education of the NEC. My name is well known in the circle of those involved in the code making process. I am a certified electrical code enforcement instructor and sit on several committees. This can easily be check by simply going to this web site and seeing for yourself.
Look under the Committees then Education Committee as well as under officers and look for the name Mike Whitt, yea that is me.
I helped write the manuals that the NC Dept. of Insurance Qualification Board mandates that instructors use for teaching electrical inspectors for 2002, 2005, and 2008. Without a doubt I will be asked to help write the manuals for the 2011 code cycle also.
Please understand I am not just spinning my wheels but am telling you fact not something someone has thought would work but what has already been proven to be fact. I have devoted my entire life to learning the theory behind electrical current flow not just reading junk someone has posted on some web site that they think will work.
What you propose as what is proposed by that idiot in the web site you posted is nothing but a death trap waiting for someone to get involved. It teeters on being criminal.