Based on the '05 NEC the wording in 250.50 states that "if present" all of the listed electrodes will be included in the GES. In some areas the re-bar os the foundation and or basement walls consist of numerous pieces of re-bar that are not tied together. If the bars are not 20 feet and => 1/2 in in diametr then they don't qualify as an electrode and would not be included in the GES. It's only the larger projects where engineering spec out the re-bar and the tying together that we are fased with using the re-bar as an electrode. Since the State of Michigan is just now adopting the '05 NEC I wonder what the rest of the areas are doing? Is there any wording in the building codes that would have the builders tying the re-bar together to form an electrode?
