I have wired a few lights with 2 switches, but now I have a location where I need 3 switches. I guess I need a DPDT switch in the middle with SPDT at either end. In Global House even getting a SPDT light switch is not easy. Staff didn't have a clue.

 

Plan B is push buttons with a latching relay, but that only got us blank looks. When I asked for relays all I got was the usual 'mai mee', even as I pointed at the rows of relays sitting in the display cases behind locked glass.

 

What is the 'correct' way of doing this and where can I get the bits?

 

Thanks,

Peter.

Panasonic range has intermediate switches.

http://pessth.panasonic.co.th/product/switch/wideseries.html
 

Thank you very much. That is very helpful. That diagram is exactly what I had in mind. I managed to download a brochure.

 

But, where did you find the diagram?

5 hours ago, beddhist said:

Thank you very much. That is very helpful. That diagram is exactly what I had in mind. I managed to download a brochure.

 

But, where did you find the diagram?

They really are not difficult to find, here is another 

 

just DAGIS "two way switch connection diagram"

Sorry, I meant where does the Panasonic diagram come from? Cause it's not in the brochure, nor can I find it on their web site. Makes me wonder whether there is a part of the web site I have not discovered.

 

????  https://en.wiktionary.org/wiki/dagis

 

Thanks,

Peter.

11 hours ago, beddhist said:

But, where did you find the diagram?

When looking for product info always try Google with part number or whatever info you have.

 

E.g. Google image search results using Panasonic part number for intermediate switch - WEG5004K + diagram

https://www.google.com/search?hl=en&tbm=isch&source=hp&biw=1920&bih=937&ei=U10lXajGK5GVwgOm25vIAw&q=weg5004k+diagram

Panasonic Three way and Panasonic 4 way light switches are readily available at better "electric shops" and builders merchants stores in Buriram. An easy item to buy on line if the stores near you do not stock such 4 way light switches. 

Thank you people. After wading through lots of Thai web sites and a few non-functional online shops I finally ordered the switch. You can tell it's a low-volume item: almost 400B for one.