RG-6 is a reference to a variety of coaxial cable, used for sending and receiving sound and video signals. The most common application is for transmitting cable television. Standard RG-6 cables have an 18 AWG center conductor and 75 ohm characteristic impedance. They can have several types of connectors, including F connector, BNC connector, and RCA plugs.
There are three types of RG-6 cables: plain or house, flooded, and aerial or messenger. Each is designed for use in different environments. Plain or house is used for wiring inside or outside a house. Flooded is used for underground burial or inside buried conduit, and aerial or messenger for use in above ground drops from utility poles.