The NEMA 5-20 is a type of electrical outlet and plug configuration commonly used in North America. It is designed for 120-volt circuits and can handle up to 20 amps of current. The outlet features a T-shaped slot, allowing it to accept both 15-amp and 20-amp plugs, making it versatile for various devices. This configuration is part of the NEMA (National Electrical Manufacturers Association) standards, which ensure safety and compatibility in electrical systems. The NEMA 5-20 is often found in residential and commercial settings, powering appliances like computers, power tools, and other equipment that require higher amperage.