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Double Shielded Armored Coaxial Cable
Coaxial Cable: A cylindrical transmission line comprised of a conductor centered inside a metallic tube or shield,
separated by a dielectric material, and usually covered by an insulating jacket. A cable with one conductor completely surrounded by another conductor, separated by a dielectric. The two conductors being coaxial. Some types of coax cables use multiple conductors surrounding each other. Normally only the inner conductor carries a signal. The outer conductors [Braid] are used as a shield, or grounded.
The term Coaxial is normally shortened to Coax.
The graphic above shows one example of a multi-conductor coax cable. This one having an armor shield. Cable armor is normally used in harsh environments, or when required by code. Two conductor braids are used which form the outer conductor, which is normally grounded. Using two separate braids provide better shielding than one braid alone.
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