i wanna know how much distance should be in between the power cable and the cat5 cable
standard used to be 185 feet somewher 100 meter ,I am not sure what you mean by to power ......
it could be ok at a few inches however i personally had experience where it had to be a few feet but only with power going to a florecent light... whenever light was turned on i lost net yet cat5 could be run right next to light itself or other power lines no problem.. fyi, no one could figure it out, even qwest dsl service people ( 3 in all) - ended up having to be 3 feet from just that certain power line
after standards cat5 cables are not run parralell with power cables, instead intersected