amy888

Happy Thanksgiving! May everyone have a blessed holiday season!

Cable is like a pipe. Charges is like the water. Current is like the water flowing rate through the pipe, volume of litres per sec. Voltage is like the water pressure from one point to another inside the pipe. Energy is like the water meter terminal located at the outlet of individual home, counting the accumulating charges that reaches our home. This is how we can have an alternative view on electricity. Here is a Voltage drop calculator for your refeference: https://www.elect-spec.com/voltage-drop-calculator.html

Did your power adapter 12V DC output? SCD-3080P support 24VAC power supply and 12VDC power supply.

DVRs draws about 2A each. Change the original fuses to increase the output current limit. As long I don’t draw more than the 20A maximum capacity of the transformer should I have a problem? --Of course 20A transformer is better. About the PTC: http://www.elect-spec.com/fuses-vs-ptcs/ http://www.elect-spec.com/cctv-ups-power-supply/

Works on either 12VDC or POE. No need connect both the 12v power and PoE.