In NEC Table 300.5, what term is defined as the shortest distance between the top surface of any direct-buried conductor, cable, conduit, or raceway and the top surface of finished grade?

In NEC Table 300.5, what term is defined as the shortest distance between the top surface of any direct-buried conductor, cable, conduit, or raceway and the top surface of finished grade?

• A. Rise
• B. Backfill
• C. Depth
• D. Cover

Answer: (D)

Cover is the distance used in NEC Table 300.5 to describe how far the top surface of a direct-buried conductor, cable, conduit, or raceway sits below the finished grade. This term specifically measures the shortest vertical distance from the grade to the top of the buried equipment, which helps ensure adequate physical protection and resistance to surface damage. Rise isn’t the standard term for this protective distance, and backfill refers to the material used to fill the trench after installation, not a measurement. Depth is a general term, but the NEC uses cover to denote this protective distance from grade to the top of the buried installation. The exact minimum cover varies by installation specifics, but the term defined in the table is cover.

Cover is the distance used in NEC Table 300.5 to describe how far the top surface of a direct-buried conductor, cable, conduit, or raceway sits below the finished grade. This term specifically measures the shortest vertical distance from the grade to the top of the buried equipment, which helps ensure adequate physical protection and resistance to surface damage.

Rise isn’t the standard term for this protective distance, and backfill refers to the material used to fill the trench after installation, not a measurement. Depth is a general term, but the NEC uses cover to denote this protective distance from grade to the top of the buried installation. The exact minimum cover varies by installation specifics, but the term defined in the table is cover.