There are several different types of CCTV (Closed Circuit TeleVision) power supplies. Currently in the digital video security industry there are two basic types of power that are used; 1.) 24 Vac and 2.) 12 v DC. Most digital video cameras utilize a low-voltage power supply so there are not as many potentially dangerous factors to be concerned about as there is if they used full household Alternating Current (AC).
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