Direct-burial cable is a type of wiring that is engineered to withstand the harsh conditions of being buried underground.
Underground Cables - an overview
What Is a Direct-Burial Wire? Benefits & Applications
Types of Underground Cables - USESI
Direct Burial Conduit: What You Need to Know - Electrical Contractor Magazine
What Is a Direct-Burial Wire? Benefits & Applications
Factory Price NOYAFA NF-816 Underground Wire Finder for Pet Fence/Electrical/Telephone Wires, Metal, Coax Cable
What Is Direct-Burial Wire or Cable?
The Effects of Soil Thermal Conductivity on Energy Transfer
Into the Great Outdoors: Running Ethernet Cable Outside