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What is Type O Plug and Socket (Outlet)?

There are two versions of the Type N plug. One plug is rated at 10 A and has two round pins (diameter 4mm) and an earth pin. The other power plug is The type O plug and socket, rated at 16 amps, is Thailand’s official standard. The Type O power plug system was designed in 2006, but its use is not widespread yet.

What is Type O Plug and Socket (Outlet)

What is a Type O plug?

The type O plug, rated at 16 amps, is one of the official standards in Thailand. The standard is described in TIS 166-2549 (incidentally, the last four digits refer to the Buddhist year 2549, which corresponds to the year 2006 in the Gregorian calendar).

Thailand Type O plug dimensions

Type O plug consists of two power pins and an earth pin, which are round and have a 4.8 mm diameter. The power pins measure 19 mm in length, they have 10 mm long insulated sleeves, and their centers are spaced 19 mm apart. The earth pin has a length of 21.4 mm. The center-to-center distance between the grounding pin and the middle of the imaginary line connecting the two power pins is 11.9 mm, which is the same distance as in type B plugs.

Thailand Type O plug dimensions

Information on the Type O plug & socket

The type O socket hybrid version of this socket was designed to accommodate plug types A, B, C and O. In the long run, compatibility with American plugs is planned to be phased out, since the electrical network in Thailand operates at 230 V. For now, type O outlets only exist on paper. All sockets that are currently sold are hybrid ones, which are compatible with types plug types A, B, C, and O.

type O outlets

Although they look similar, type O plugs are not interchangeable with the Israeli type H or the Danish type K power plugs. However, there is very unsafe compatibility between type O sockets and type E/F plugs, which is why in 2008, the Thai government banned the sale of appliances fitted with E/F plugs.

When used in Thailand, an E/F plug will not be grounded, and when such a plug is partially pulled out, you will be able to touch the prongs while they are still alive! Since many Thai people still have household appliances fitted with E/F plugs, a special plug adapter was introduced. It ensures that E/F plugs are earthed when plugged into a Thai hybrid outlet.

What countries use type O power plug?

Type O power plug is used exclusively in Thailand. 

Used in countries:

Thailand220V 50HzPower socket: Type A, Type B, Type C, Type F, Type O

Now It’s Your Turn

So that’s how I understand the type O plug and socket.

Now I want to turn it over to you: Through my article, do you understand Type O electrical plugs and Sockets (Outlets)?

Do you have a different point of view with the Type O power plug? Or any other questions?

Let me know by leaving a quick comment below right now.

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16 AWG NEMA 5-15P to NEMA 5-15R Power extension Cord

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LOGO-330

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