In general, a direct burial cable is one in which the electrical and mechanical characteristics of the cable will not substantially degrade over time once the cable has been installed. It is assumed that these cables will be in moist environments.
Belden offers a broad selection of Flooded Burial coaxial cables for CATV applications. Many of Belden's 300 volt PLTC cables and 600 Volt Tray Cables are direct burial rated. In multi-conductor cables, see 9883, 9886, 9802, 9803, 9890, and 9894.
Direct burial cables must be installed in accordance with Technical Bulletin T/8-6 "Underground Burial of Belden Cable" as well as any applicable building code requirements.