/diy/ - Do It Yourself

Hey /diy/,

I'm planning on building a 8^3 RGB LED cube build using discrete WS2811 LEDs. Using 60mA/LED draw at max brightness, I've calculated that the whole cube will require 30.72A in the worst case.

Looking at 40A supplies (pic related), the reviews often note that the supplies output a fraction of the rated current on each output rail. Would it be safe to join all the positive and negative connections in order to create a single rail capable of outputting the full rated current? Or is this even necessary if I'm only using a single output rail on the supply?

I'm looking to use a 110VAC to 5V40A power supply (pic related) for an LED cube project. Some reviews say that these supplies output a fraction of the rated current on each 5V rail, would it be feasible/safe to join the positives and negatives of each rail into a single connection to make a single rail that outputs the rated current?