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Hello Charlie, I disagree with your answer to the question for September 29, 2023. A building under construction that did not exist prior to the adoption of the current code, would NOT be considered an existing buildings or structures per the definition in the International Existing Building Code.
As such, the provisions of the exception in Section 250.50 would not be applicable. Since 250.50 specifically requires all electrodes, present be used the AHJ would be correct to require the rebar be exposed for connection of the concrete encased electrode.
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