Conduits shall be considered outside a building when installed under which condition?

Conduits shall be considered outside a building when installed under which condition?

• A. In a raceway
• B. In a raceway enclosed by brick
• C. Under not less than 2 inches of concrete beneath a building
• D. In a raceway enclosed by brick and under not less than 2 inches of concrete

Answer: (D)

Conduits are considered outside a building when they are placed in exterior construction rather than in interior spaces. The best way to meet that outside condition is to have the conduit run in a raceway that is both enclosed by the building’s exterior brick and positioned beneath the building, covered by at least 2 inches of concrete. This combination places the conduit behind the exterior enclosure and under the foundation, clearly outside the interior environment and protected from weather and damage. If the conduit were only in a raceway, or only enclosed by brick, or only beneath a thin concrete layer, it might still be considered inside depending on the specific construction and enclosure. The double protection—brick enclosure plus a minimum concrete depth beneath the building—uniquely ensures the path is outside the occupied interior.

Conduits are considered outside a building when they are placed in exterior construction rather than in interior spaces. The best way to meet that outside condition is to have the conduit run in a raceway that is both enclosed by the building’s exterior brick and positioned beneath the building, covered by at least 2 inches of concrete. This combination places the conduit behind the exterior enclosure and under the foundation, clearly outside the interior environment and protected from weather and damage.

If the conduit were only in a raceway, or only enclosed by brick, or only beneath a thin concrete layer, it might still be considered inside depending on the specific construction and enclosure. The double protection—brick enclosure plus a minimum concrete depth beneath the building—uniquely ensures the path is outside the occupied interior.