What should be paid attention to in the installation of security monitoring?
The correct grounding can minimize the effects of the ground loop. The voltage difference between the different ground shall not exceed 100mVAC (measuring the pressure difference between the disconnected coaxial cable and the shield layer and the ground terminal of the BNC behind the device).
Exposure to any interference environment reduces video quality and affects overall performance and reliability of the system. Avoid equipment exposure in large motors such as elevators, water pumps and fluorescent cylinders, as well as in a variety of high power radio equipment environments.
Another concern is the quality of the CCTV coaxial cable. RG59U, RG6 and RG11 require 100% copper cores and 95% copper braid shielding layers. The maximum resistance of the line loop shall not exceed 15 ohms.
Configuring surge protectors at the system power input is a common feature of all successful systems. Although many security systems use UPS, it is important to note that not all UPS has built-in surge protection. Similarly, video and data lines also need to be protected.
