I made a mistake like that, I ordered 16ga from Parts Express, I meant get 14 ga. I hit the wrong button I guess. To fix the problem I doubled up on the 16 gauge, two runs in parallel. I also have the wall plates. The only concern with them is to make sure the connections are tight, both inside the wall and out side. I went back and checked the connetions after a few months, and they seemed a little loose. I like the wall plates a lot for the ease of use factor.