Does the video cable of the surveillance camera have anything to do with the power cable?

There must be an impact, otherwise the power supply and signal lines will not be required to be wired separately in the construction specification.

But there are many influencing factors.

1, interference problem: 50-cycle interference of 220V AC has great influence on video quality. If the transmission distance is short and the video cable is well shielded and grounded, the impact can be ignored when the insulation of the power cord and video cable reaches the standard in the early stage of construction. But with the passage of time, grounding resistance and insulation will become worse, which may cause interference. But it's not insoluble. The video isolator can isolate the interference of alternating current.

2. Over time, the wires are aging and accidentally damaged (ground subsidence and rolling, mouse biting, water corrosion, etc.). ) aggravate the interference problem, and even cause equipment damage due to the introduction of video cable by power electricity, which increases the risk of equipment operation.

At present, long-distance video transmission is generally transmitted through video optical terminals, and video cables are generally not too long, so in the short term, it is mainly within the warranty period, which does not have much impact. So in many cases, in order to reduce the cost, the signal line and the power line are laid together.

Coupled with the simplification of various construction techniques, cables that can be used for 10 years are often scrapped in 3-5 years.