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Hi Guys, hope you can help? I have two day/night cameras about 270 ft away from the dvr equipment and it needs to be powered remotely from the dvr end.. The cameras uses about 750mA max @ 12 Volts Dc. Should i go for 12V dc Or 24V AC with a converter on?? & what size siamese cable should i use??

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Hello Nationwidesystems!

 

Distance wise it looks like you are ok for RG 59. You will need a large gauge for the two conductor for power.

 

http://www.altronix.com/index.php?pid=4&note=1&PHPSESSID=4bcb5bfed2f00ae9bbd6242504f6acd6

 

Perhaps you can use a higher voltage at the DVR end to make up for the voltage drop?

 

If you use AC it may be possible to have a ground loop issue.

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