House building

Fancy slow speed fans were the rage here a decade or so ago.  Should not be a problem finding them in Bangkok.

Have not seen surface wire done in trays, other than for air conditioners where pipes are included, but there is local made plastic available in various sizes about 1 meter long which is quite inexpensive and available almost everywhere so no reason you could not use brand name types.  Wire can be run inside the walls with the yellow PVC conduit and that seems to be the norm now.  You will have to make sure they understand three wire system and ECLB usage for safety.

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Thanks, lopburi...

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What ever method of wiring raceway and enclosures you select, would advise that you confirm that they are inflammable. Most electrical fires are caused by an over-amp problem which can easily generate enough heat to flash fire plastics. Sorry, don't know the properties of the yellow PVC conduit. If cost is not an issue, Wiremold and Panduit products are an excellent choice. I prefer not to use them as it tends to make the walls look like shiite with all the exposed raceway. Best to plan ahead in your design and place the raceways in walls if possible. Also, would advice to error on the excessive side of installing wall plugs, unless you are a fan of plug strips and those lovely extension reels laying on the floor. Have yet to live in a home in Asia that was wired with sufficient plugs.

The advice to get a competent electrician who understands and cautions on the side of safety is well to heed. As indicated by other posters, make sure you get a three wire system (power, neutral, ground) that is connected properly. Would also recommend that you confirm that the neutral bus bar in the power distribution panel is also grounded(earthed) to a rod driven into the soil outside the home. This gives any neutral wire leakage an alternate path and keeps one from being knocked on their @ss everytime they touch metal enclosed electrical devices

IMHO Sparky

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Had all our wireing chased in as did not want to see wires all over the house.

Had to add additonal sockets as Thais think one per room is enough.

Keep a close eye on your contractors as they tend to do what they want rather than what you want