North American grounded plug

North American grounded plug
This plug is the grounded North American 15A plug. (The ungrounded plug is the type A) Standard: NEMA 5-15P

Plug with two parallell flats pins and a round ground pin

This plug is the grounded North American 15A plug. (The ungrounded plug is the type A)
Standard: NEMA 5-15P

Type B