RG6 CATV coaxial cable typically uses an 18 AWG conductor and is available with copper-clad steel, dual-shield, quad-shield, or plenum-rated constructions for varied installation needs. RG59 cable uses a 20 AWG oxygen-free copper conductor with a full copper braid shield and supports 75-ohm applications, including analog and digital audio/video, HDTV, broadband video, and baseband video.

Shielding helps protect signals in catv coaxial cables by reducing the effect of electromagnetic and radio-frequency interference that can cause noise or signal loss. Dual-shielded cable adds more protection than a basic shield, while quad-shielded RG6 cable provides additional shielding for installations with greater interference concerns.

Use plenum-rated CATV coaxial cables when the cable runs through air-handling spaces, raised-floor systems, air ducts, or drop ceilings where plenum-rated cable is required. These cables are designed for in-wall plenum and riser applications, while standard-jacket coaxial cable may suit runs that do not pass through those spaces.

Compare the conductor type and gauge, such as 18 AWG copper-clad steel or oxygen-free copper, along with shielding options such as dual-shield or quad-shield construction. Check whether the jacket is standard PVC or CMP/plenum rated for air-handling spaces, and choose a 500-foot box or spool when a bulk cable length suits the installation.