Where is the concrete encasement located for a concrete encased electrode?

• A. At the top of the foundation
• B. In the middle of the foundation
• C. Within and near the bottom of the foundation
• D. Outside the foundation

Answer: (C)

A concrete-encased electrode is a grounding path formed by running a conductor through concrete that is part of the building’s foundation. The concrete encasement must be placed within the foundation itself, specifically near the bottom, so the conductor is surrounded by concrete and in contact with moist soil in the footing. This position provides a stable, low-impedance path to the earth and protects the conductor inside the structure. Placing the encasement at the top, in the middle, or outside the foundation wouldn’t meet the requirement for a proper concrete-encased grounding electrode.