What kind of wire do I need to piece out the the power wire from transformer for the v-720w camera?
Are you talking about running a dc power cable extension? 2.1mm 26AWG
$2 3M/9’: http://www.mcmelectronics.com/product/23-761
$5 10M/32’: http://www.mcmelectronics.com/product/23-763
Here is the 9’ extension on an ADC-520IR