The purpose of electrical boxes Wiring connections—where wires join an outlet, switch or other wires ... get the large ones, which are 4 in. square by 2-1/8 in. deep. You’ll find cover ...

Reattach the wall plate to see if that fixed it Sometimes, an outlet can be loose because the electrical box is recessed too deeply into the wall or wasn't installed level. If it's less than 1/4 ...