Important: Vietnam uses 220 V, which is higher than the 120V used in North America. Make sure your devices support dual voltage (usually labeled as 100-240V) before plugging them in. In order to avoid potential damage to your home electrical appliances and devices, it is best practice to purchase a travel power adapter prior to arriving in Vietnam. This plug design dates back to 1904 and remains one of the most widely used plug types. Vietnam Type F power cords are black as standard color. IEC 60320 C-15 120C connector available on some Vietnam AC. Medium voltage (voltage level 35Kv/22Kv) and low voltage (voltage level 400V/220V) include: – Technical design, supply and installation of equipment for outdoor, indoor, and integrated power supply stations (Outdoor/Indoor substations and Kiosk substations) – Technical design and supply and. Vietnam uses outlet types A, C, F at a voltage of 220V and a frequency of 50 Hz. Plug Compatibility: Type A, Type C, Type F Voltage: 220V Frequency: 50 Hz Can North Americans use Electronics in Vietnam without an Adapter? No! North Americans may need an adapter for the outlets and transformer for. The voltage in Vietnam is 230 volts and the frequency is 50 Hz. There are three types of universal sockets: the ungrounded version (which accepts types A and C), the grounded version (which supports.