Please forgive my layman's questions.
I need to purchase a 12v power distribution 18Ch box for my 16 hard wired cameras (large house...large gardens, some self build plots we are developing)
Most boxes on Amazon/Ebay offer either 10a or 20a or 30a with subsequent price increases
1. what is the recommended amperage 10/20/30a and why...I wish to keep the purchase price as low as possible
2. are the distribution boxes designed so that each channel supplies 12v to each camera; obviously with a smallish reduction due to cable length/efficiency