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What is Coaxial Cable?

Coaxial cable, or coax cable, is designed to transmit high-frequency signals. It’s comprised of a round copper conductor and three layers of insulation and shielding which prevents crosstalk from motors, lighting and other sources of EMI. With the shield construction, the coaxial cable can support longer cable lengths between two devices.

Coaxial cable

There are a number of different types of coax, but only two—RG59 and RG6—get the most use in residential applications. The name “RG” dates back to World War II and means “radio guide” which doesn’t have really signify anything today.

Coaxial Cable TypesDescription
RG59RG59 is the basic coax cable. It’s thinner and has less shielding and best suited for cable TV transmissions and short cable runs.
RG6RG6 coaxial cable is heavier gauge and has thicker insulation and better shielding. It is better for digital video signals and satellite TV.



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