Which requirement is placed upon underground service conductors to ensure safety?

The requirement for specified burial depth is crucial for underground service conductors because it directly impacts safety and protection against physical damage. This burial depth is designed to minimize the risk of accidental excavation or disturbance during normal landscaping or construction activities. When conductors are buried at the correct depth, they are less likely to be exposed to external forces, reducing the chance of damage that could lead to electrical hazards. Following the burial depth requirements outlined in the National Electrical Code ensures that underground wiring is adequately protected from environmental factors, mechanical impact, and other safety issues.

While factors such as the minimum voltage rating, bonding to structures, and insulation thickness are important considerations in electrical installations, they do not specifically address the safety related to the physical placement of service conductors underground. The specified burial depth is a distinct requirement that specifically targets and enhances the safety of underground electrical installations.