The depth will be determined by a variety of things. If the cable is in a metal conduit, it should be buried at least 18 inches deep beneath a driveway, and at least 24 inches deep if under public roadways. Nonmetallic conduit should be buried at least 18 inches below the surface of the soil.
RBT has the equipment, experience, and knowledge to supply complete electrical trenching and excavating services. Contact us today to fulfill all your electrical and automation requirements, from small repairs to complete design and installation of projects.