What is the symbol for a 20 amp outlet?

The symbol for a 20 amp outlet is typically represented as a NEMA 5-20 receptacle, which features a T-shaped slot. This design allows it to accept both 15 amp and 20 amp plugs, with the T-shaped slot accommodating the larger 20 amp plug. In electrical diagrams, it may also be denoted as "20A" or "20R" in conjunction with the NEMA designation.