What is the max distance that installers can run CCTV cable for video and power? 
Here is a question that I received from a customer recently.
Hi Mike, can you please assist. Is it possible to run power cable together with the video on RG59 Cable for a distance of 250 meters. I am a new CCTV technician who has just faced a challenge on an old installation which is not working properly.
Here is the information that I provided.
Analog CCTV camera video transmission is limited to 213 meters or 700 feet using RG59 coaxial cable, unless you use a video amplifier like this one.
https://www.cctvcamerapros.com/Security-Camera-Video-Amplifier-p/amp-1001.htm
Using this amp, you can run CCTV video up to 1000 meters / 3000 feet with RG59.
The max distance that you can run power cable to the camera without voltage drop depends on the voltage, amount of power the camera draws in amps, and the gauge of the cable that you are using. You can use this voltage drop calculator and voltage drop chart.
https://www.cctvcamerapros.com/AC-DC-voltage-drop-cable-distance-s/846.htm
Please let us know if we can help further.