Find your breaker box. You'll find the pole ground there. If you want to drive a ground in your crawl space, make sure it is of the correct diameter and depth specified by your local code. It would work find.
My home uses below ground wiring but there is a rod by the house where the power comes up to the meter from the ground. Check around, you've got a meter somewhere.
Your neutrals are tied to pole ground back in the box on the neutral buss. All of your bare coppers from you home are there also.
I honestly don't think you will accomplish a lot by using a ground rod, however. Use a isolated ground recepticle, however, of hospital grade(preferably a Hubble)
My home uses below ground wiring but there is a rod by the house where the power comes up to the meter from the ground. Check around, you've got a meter somewhere.
Your neutrals are tied to pole ground back in the box on the neutral buss. All of your bare coppers from you home are there also.
I honestly don't think you will accomplish a lot by using a ground rod, however. Use a isolated ground recepticle, however, of hospital grade(preferably a Hubble)