tkrussell
Mar 15, 2011, 07:26 AM
Not sure what you are referring to.
Where did this question arise?
What is your situation?
sinnadurai
Mar 16, 2011, 02:10 AM
Your question is not clear. If you mean depth,it depends on resistivity of soil,type of soil(chemical properties)type of electrode used and electrode resistance required(LV system/telecom/lightning etc)