If only half of the outlet is switched, be careful what you connect to each portion of the receptacle. The switched half should be reserved for lamps or other items you want to control with a wall switch. The always-on half should be used for devices you don’t want losing power, such as alarm clocks, routers, internet equipment, chargers, and similar devices.
Never overload an outlet, even if it seems convenient. Switched receptacles are still limited by the circuit and the outlet’s rated capacity. Large appliances, space heaters, and other high-wattage devices should always be used according to the manufacturer’s instructions.
In addition to following proper loading guidelines, if your plug feels loose, your outlet becomes excessively warm, or you notice burn marks, scorched plastic, or buzzing sounds from your switch, stop using the outlet and contact a licensed electrician to inspect the system.
Can I reverse my outlet to suit my personal preferences?
While it may seem appealing to simply reverse an outlet if its appearance bothers you, doing so involves much more than changing its orientation.
To flip an outlet around, you will need to work inside an electrical box. You must disconnect power at the main breaker panel and verify there are no energized wires using an approved tester. You will also need to reconnect the wiring correctly and ensure all connections are secure to help prevent fire and electrical shock hazards. Furthermore, if you’re reversing an existing half-switched receptacle, you’ll need to ensure your changes don’t disrupt service to other components on the circuit. Including GFCI-protected circuits or multi-wire branch circuits.
Because of these potential risks, unless you’re specifically trained in electrical work and have experience working with electrical systems, it is highly recommended that you have a licensed electrician confirm that your outlets are properly wired, installed, and safe.
Also note that working in older homes or rental properties may require permission from landlords or property managers before performing any electrical modifications, even minor cosmetic ones.

A little-known secret about your house
The flipped outlet orientation can provide insight into other aspects of your home. When you learn about the possible implications associated with flipped outlets, you’ll begin to notice them everywhere as clues pointing toward different aspects of your home’s design and functionality.