Electrical wire 3/0 awg is a standard cable, also known as THHN wire #3/0, that WesBell keeps in stock. It has a PVC insulation with a Nylon jacket to resist water, gas and solvents. It can be used outdoors and in conduit, but isn’t suited for direct burial. It’s used for all electrical wiring applications indoors and outdoors.  We also have Hook up wire and Teflon wire for indoor use and high temperature applications.  Larger awg rubber power cables are available such as Welding cable and entertainment cable.  We also stock the electrical cables like Romex (Indoor use), UFB Cables (Outdoor/Direct Burial) and Tray cable. WesBell also offers FREE SHIPPING over $250.00 to anywhere in the continental USA. Please call for all your wire and cable needs because we stock a lot more than we’re able to put on the website!