RG6 in-wall coaxial cable typically uses an 18 AWG conductor and suits longer runs, CCTV, broadband video, and other applications that benefit from added shielding. RG59 uses a smaller 20 AWG conductor and is suited to 75-ohm digital audio/video, analog audio/video, HDTV, SDI, broadcast, and baseband video interconnects.

Use plenum-rated in-wall coaxial cables when a commercial cable run passes through an air plenum, such as a raised-floor system, air-handling duct, or drop ceiling used for air circulation. These CMP-rated cables are designed for plenum spaces, but confirm the project requirements with applicable codes and the authority having jurisdiction.

Compare conductor material and gauge, such as 18 AWG copper-clad steel, 18 AWG oxygen-free copper, or 20 AWG oxygen-free copper, along with shield construction, including dual-shield, quad-shield, or full copper braid designs. For in-wall runs, compare PVC jackets with CMP or plenum-rated jackets when the cable will pass through air-handling spaces, raised floors, ducts, or drop ceilings, and check the project’s required rating, such as CL2.

Measure the full route from source to destination, add extra length for service loops and changes in direction, and plan gentle bends away from sources of electrical interference. Select connectors that match the cable type, use plenum-rated in-wall coaxial cable for air-handling spaces when required, label both ends, and test the finished run before closing the wall.