I need advice in placing grounding rods when upgrading electrical service from 100 amp to 200 amp.
Code requires at least 2 5/8" x 8' rods placed no closer than 6'.
Soil conditions: sandy loam. Water table is about 15-18' below grade.
I am considering stacking rods so I will end up with 2 16' rods.
Question is how close can these be without compromising effectiveness of grounding system?