Vietnam supplies electricity at 220 volts, at 50 hertz, using types A, C, and F sockets.
The World Bank rates power quality in Vietnam at 3.5 out of 7.0, suggesting many interruptions and voltage fluctuations.
Most of Vietnam's homes and businesses use types C, and G sockets.
Type C sockets, also known as Europlug sockets, have a round, recessed, receptacle with two round, parallel, line and neutral pin holes.
Type C sockets only accept type C plugs.
In parts of Vietnam travelers might also encounter types A, and F sockets.
Type A sockets, also known as US, or North American sockets, have a flat receptacle, with two rectangular, parallel, pin holes, one slightly larger than the other.
Type A sockets only accept type A plugs.
Type F sockets, also known as Schuko, or German sockets, have a round, recessed, receptacle with two round, parallel, line and neutral pin holes, and a grounding contact on each side.
Type F sockets accept types E, C, and F plugs.