Electrical devices are available in contractor or consumer grade [cheap], commercial or specification grade [much better], and hospital grade. All of the electrical manufacturers [Leviton, Hubbell, LeGrand, AH&H, etc.] make these grade. A wall outlet can be had for $0.95 to $50. In all cases, ALWAYS side wire the device, NEVER use the push in back wire features. The better grade devices grip the plugs like a gorilla, and really help to get a solid connection. All of my receptacles feeding audio gear, and all of my shop receptacles are hospital grade. All of my kitchen and laundry employ spec grade, and that extends into a good part of the house. When the contractor grade stuff fails, it is replaced with spec grade. All romex in my house is 12 AWG or larger, and ALL receptacles, switches, and GFCIs are side wired. All wiring is copper, including all 200A wire between the utility meter and the transfer switch disconnect.