In the case of severe acute aortic insufficiency, all individuals should undergo surgery, if there are no absolute contraindications (for surgery). Individuals with bacteremia with aortic valve endocarditis should not wait for treatment with antibiotics to take effect, given the high mortality associated with the acute AI.
Where the ground rod is located far from the main electrical panel, thicker No. 3 wire may be required. In areas where codes require two ground rods because of high electrical resistance in the soil, the rods must be spaced at least 6 feet apart and interconnected by a buried jumper wire.
Shallow earth grounds are those where a single-length (typically eight-feet long) copper-clad ground rod is driven into the ground to which a grounding wire or strap is attached to the top. Deep earth grounds ause multiple grounding rods coupled together and driven to depths of 20 to 60 feet or more.