Electrical conduit generally needs to be buried at least 18 to 24 inches deep, depending on the location and type of installation. For open ground installations, 24 inches is typical, while under driveways or concrete slabs, 18 inches is usually sufficient due to the added protection from the surface. Low-voltage wiring (30 volts or less) often requires only 6 inches of burial depth. These depths comply with the National Electrical Code (NEC) Article 300.5, but local codes or specific project conditions like frost levels or soil type may require adjustments.

Key burial depths summary:

• Open ground, standard electrical conduit: 24 inches
• Under driveways/concrete slabs: 18 inches
• Low-voltage landscape wiring: 6 inches

This ensures safety, minimizes damage risks, and follows regulatory standards.