This is a 2-gang outlet cover for the North American standard. It's a simple, supportless print that takes about an hour depending on your printer and slicer settings.
ADDITIONAL HARDWARE NEEDED
Two 6-32 screws, at least 5/16in deep.
MY PRINT SETTINGS
I sliced my print in Cura using the following settings, and used standard PLA from Creality.
INSTRUCTIONS
Decide which cover plate fits your use case. The XL is not a standard XL size, but it is large enough to cover up any holes you might need to hide.
Slice the STL with your preferred slicer. You will probably have to flip the STL over so that the flat surface is flat against the build plate.
Print the cover plate.
If anything is plugged in to the desired outlet, unplug it.
(RECOMMENDED) Turn off the breaker for the desired outlet.
Align the new cover plate with the sockets and screw into place.
WARNING: EXPOSED OUTLETS CAN BE DANGEROUS. DO NOT ATTEMPT IF YOU DON'T KNOW WHAT YOU'RE DOING.