The required burial depth for electrical raceways is dictated by the National Electrical Code (NEC) and local regulations. This depth varies based on several factors, including the type of conduit, the voltage of the wiring within, and the location (e.g., under a driveway, in a residential yard, or beneath a roadway). For instance, rigid metal conduit generally requires a shallower burial depth compared to nonmetallic conduit under similar conditions.
Adhering to mandated burial depths protects electrical systems from physical damage, ensuring safety and preventing service interruptions. Adequate coverage safeguards against accidental contact during digging or other surface activities. Furthermore, compliance contributes to the longevity of the electrical installation and minimizes the risk of costly repairs and potential hazards. Historically, these regulations have evolved alongside construction practices and the increasing demands for reliable electrical infrastructure.