To bury electrical wiring, determine the appropriate depth for the wire according to local building codes, dig a trench to the recommended depth, and install the conduit and wire. Install a service entrance, and cover the wire with dirt.
Low-voltage wires are generally buried at a depth of at least 6 inches, while high voltage wires are buried up to 24 inches deep. The conduit installed with the wiring should be appropriate for the wire depth. For instance, at 18 inches deep, install PVC conduit with THWN-2 conductors. For wire buried 6 inches deep, use a metal conduit with waterproof electrical wiring.