Type A plugs, rated at 15 Amps, are used mainly in the United States, Canada, Mexico, South America and Central America. This is a Class I, non-grounded, non-insulated plug that operates on AC current and is known as NEMA 1-15. The plug has two 1.5 mm thick blades which measure 15.9 – 18.3 mm in length and are spaced 12.7 mm apart. The neutral blade is 7.9 mm wide, while the hot blade is 6.3 mm wide. This plug almost always operates between 100 – 127 volts and is only compatible with socket type A.

Type B plugs, rated at 15 amps, are used mainly in the United States, Canada, Mexico, South America and Central America. This is a class I grounded, non-insulated plug that operates on AC current and is known as NEMA 5-15. The plug has two 1.5 mm thick blades which measure 15.9 – 18.3 mm in length, and are spaced 12.7 mm apart. It also features a 4.8 diameter round, or u-shaped earth pin measuring 3.2 mm which acts as a ground. This plug almost always operates between 100 – 127 volts and is compatible with type A and B sockets. Grounded type B outlets are still rather uncommon in some parts of Central and South America. However, it is not uncommon for people to cut off the earth pin to achieve compatibility with two-pole, non-grounded sockets.

Type G plugs can be found in Belize, Guyana, Grenada, Dominica and Saint Lucia. The plug features three rectangular prongs that form an isosceles triangle. The BS 1363, or type G plug operates at 13 Amps on AC current at 220 – 240 Volts. The central, grounded prong is 4 by 8 mm and measures 22.7 mm long. Line and neutral pins are 4 by 6.35 mm and measure 17.7 mm long. Center-to-center distance between line and neutral prongs measures 22.2 mm, as well as the distance between the earth pin and the middle of the imaginary line connecting the two power pins. 9 mm long insulated sleeves prevent accidental contact with a bare connector while the plug is partially inserted.