Most security camera video is transmitted using coaxial cable like RG59 and RG6 using a composite video signal. The most popular cable is Siamese Cable, which is a combination of RG59 for video and a pair of 18-gauge for power in one jacket. This design makes it so that you only need to run one cable for each camera. This type of cable is good for runs under 750 feet and comes on spools of 500’ or 1000’. Using RG6, you can achieve runs longer than 750’; however, most CCTV professionals use CAT5e and Balun connectors for cable runs over 750’.
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