I'm not second-guessing my electrician, just gathering information for later.
We agreed to install 2 ground rods, per code, and then tie a second ground to the water supply line, also code I am told. With that they are also going to connect a ground between the hot and cold pipes at the water heater.
My question, what does the ground at the water supply do that the 2 ground rods don't? second question, as I intend on replacing all of my hot water lines with PEX, obviously the ground at the water heater will no longer exist - am I creating a dangerous condition or can I safely remove the metal hot water pipes and replace with PEX - so that I no longer have any metalic hot water pipes?