I have designed a system to control LED light strips (Adafruit NeoPixel strips) using an Arduino from a C# program in Windows. I have been through the prototyping phase with a breadboard and a single strip of lights. The system works well. Now I want to design a PCB to act as a hub for for multiple strips of lights so that when I connect them in parallel, I won't incinerate the breadboard.
My system run off of 5V and has a theoretical maximum current of 8.16 Amps (with 3 strips of lights). I already have a 5V 10A power supply with a 2.1mm x 5.5mm barrel jack. The high amperage of the system is where my questions about safety begin...
First, how should I go about connecting the 2.1x5.5mm barrel jack to a PCB? I could use a DC Barrel Jack connector like this (https://www.pololu.com/product/1139), but those are not designed for more than 5 amps. I could use multiple connectors on the PCB, but the splitters that are available all seem to be very low quality (and my final product won't be very clean looking). If you know of a different connector (say, MOLEX) that might have a higher Amperage rating, I would be open to finding a 2.1x5.5mm adapter.
Second, how should I go about distributing the power for the 3 light strips? I am using https://circuits.io/ to design the PCB and the maximum trace width is 80mil. Could I run 3 80mil traces originating from 1 connector? One for each light strip?