I'm developing a new PCB and I recently realized that all my power connections are on one side of the board, easily connected with a wide trace. So, I don't really need the inner power layer of the board. I do need an inner ground, though, since the ground connections are just all over the place. I …

Grounding the power layer of PCB

fungus May 22, 2014, 11:06pm 2

Yes.

If you don't ground it it can accumulate charge and cause all sorts of problems.