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TIS 166-2549 Thai plug and socket |
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TIS 166-2549 plugs have been developed in
Thailand and are meant to replace Schuko (CEE 7/4) plugs on imported
equipment. Sockets in
Thailand accept North American flat blade plugs (but 220 V) and CEE
7/16 Europlugs, but not CEE 7/4 plugs. '2549' is the year of introduction of the standard according to the Thai Buddhist Era. It corresponds to our year 2006. |
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1, 2 | Multi-standard
sockets, rated at 16A - 250V. They accept US NEMA 1-15R (top
outlet), NEMA 5-15R (bottom outlet) flat blade plugs and CEE 7/16
Europlugs. These multi-sockets are
commonly found in Thailand, Cambodia,
Laos and Vietnam. Also Schuko plugs can be inserted as illustrated by the superimposed black Schuko plug (see no. 2). However, only the line and neutral pins are functional; there is no connection between Schuko earth clips and the US earth pin slot. In this situation a Schuko plug behaves as a non-earthed 2-pin plug. To stop this unsafe use of Schuko plugs, the Thai authorities have designed in 2006 a new type of plug that has to replace Schuko plugs, see no. 3. For already existing appliances equipped with a Schuko plug, an adapter can be used, see nos. 4-7. |
3 | As of 2008 it is a
legal requirement to fit the
newly
developed Thai standard TIS166-2549 plug on imported appliances that
otherwise would have a Schuko plug. A TIS166-2549 10A, 250V
plug fits in a NEMA 5-15R type socket, see image no. 1 (lower
outlet). This combination provides for an earthed connection, assuming
that the socket is connected to an earthed network. Only TIS 166-2549 plugs molded on an extension cord are available; rewirable plugs are not for sale. {DC} |
4 - 7 | The
Thai Schuko adapter provides for an additional earth pin (see no. 4)
which is connected to one of the earth clips of a Schuko plug (see
nos. 5 and 7). The combination of two Schuko pins (N and L)
and the earth pin of
the adapter (see no. 6) will fit correctly in an earthed
multi-standard socket (see no. 1).
{DC} Note that the adapter has disappeared from general hardware stores and it is not clear whether they are still available elsewhere (info given in 2016 by John Goodwin). |
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D i g i t a l M u s e u m o f |
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P l u g s a n d S o c k e t s |
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