Professional Answer: Ensuring a successful direct burial installation involves several best practices. First, always consult local electrical codes and contact "Call Before You Dig" services (like 811 in the U.S.) to identify existing underground utilities. Proper trench preparation is critical; the trench should be deep enough to meet local code requirements (often 24 inches for direct burial), with a smooth, rock-free base. Use a layer of sand or fine soil as a bedding and backfill material to protect the cable jacket from sharp objects. Finally, to prevent future damage, install a warning tape about 12 inches above the cable to alert any future excavators.