Crossy

I really wouldn't be so sure, but let's isolate which circuit has the problem.

RCD problems seem to be en-vogue at present, at least that's one off the list

OK, now it gets harder. Please take great care!! First check with your meter that you have a high resistance between the N bar and the E bar (power off of course) Assuming that's OK. Disconnect about half of the blue wires from the neutral bar and then try the RCD. If it stays on, then connect the blue wires one by one until it doesn't (ideally you should use an insulation tester, but one assumes you don't have one). Otherwise pull the remaining blue wires, hopefully with them all off the RCD stays on. You are trying to isolate which neutral has an issue to earth. So, connect your blues one by one, trying the RCD each time. Hopefully you will end up with one that trips the beast. "All" you have to do then is check that circuit for damp / ants / rat damage etc. .

Unless something is actually fizzing, I doubt there's an issue there (at least not one that would cause your RCD problems). Step by step, no point throwing money at it until we know what's actually wrong.

Well, with that bond the RCD has no chance of remaining on. If you want to implement a MEN system the bond must be between the E bar and the INCOMING neutral (so the blue wire on the main switch). So, for now remove the link so we can see if you still have RCD issues.

Great. I get really worried if I can see bare copper, zooming in I can just make out the covers

Ah, maybe I see it. Is that a green/yellow from the bottom of the N bar round to the E bar? With that link there it's not surprising the RCD won't stay on. Do you have an earth rod?

OK, let me get this right. The large MCCB (the white unit at the top) connects to the incoming supply which is split by those two (lethal, please put the covers on) connector blocks one branch of which feeds your distribution board. Correct? The supply polarity now looks correct, please verify with your neon (should light on the brown wire). With the supply off, please check for a resistance between the N bar (all the blue wires) and the E bar (green/yellow wires), you should see a very high resistance / open circuit there.

The black and grey feeding the bottom of your main breaker are POTENTIALLY the wrong way round going by colour codes (not really a reliable indication but worth investigating). Do you have a multimeter? Or at least a neon-screwdriver? Please tell me you're not swapping the main breaker for the RCD with the supply live.

Better post a photo of your RCD too please. Close enough that we can read the rating text. If it won't stay on even with all the breakers open you very likely have a Neutral-Earth fault, it could still be the damp. Do you have any test gear (multimeter)? Have you verified that there's no damp in the works anywhere? Please also confirm that it has actually been OK in the past. It is looking like you need a sparks with the proper gear (an insulation tester at least) and the knowledge of how to use it. EDIT I'm also looking at your main breaker wiring, if the colour-coding is correct (definitely not a given) you appear to have a reversed L&N.

A Dentist, doing his first extraction on a patient, was understandably nervous. When he got the molar out, his hand shook, he lost his grip on the instrument, and the tooth dropped down into the patient's throat. "Sorry," said the doctor. "You're outside my specialty now. You should see a laryngologist!" By the time the unfortunate victim got to the laryngologist, the tooth had worked its way much further down. The laryngologist examined the man. "Sorry,"said the doctor, "You're outside my specialty now. You should see a gastrologist!" The gastrologist X-rayed the patient. "Sorry," said the doctor, "the tooth has traveled into your lower intestines. You should see an enterologist!'' The enterologist took some X rays. "Sorry, the tooth isn't there. It must have gone down farther. You should see a Proctologist!" The Proctologist examined the patient.... inserted a proctoscope and remarked... "Good heavens, man! You've got a tooth up there! You should see a dentist!"

Rice may attract the ants we also want to avoid.

Hmmm, who installed the RCD? Can you post photos of the board with the lid off please. Are you saying the RCD won't stay on even if all the breakers are off? If that's the case you are probably looking at a neutral to earth fault which can be a nightmare to find. Do check boxes for damp and possible ants.

It definitely sounds like the damp has gotten somewhere it shouldn't. Check that your boxes are completely dry (Madam's hair-dryer) then try to hunt out any other places where the wet could access.

It all the fault of listening to GHR!

A blonde decides to try horse riding, even though she has had no lessons or prior experience. She mounts the horse unassisted and it immediately springs into motion. It gallops along at a steady and rhythmic pace, but the blonde begins to slip from the saddle. In terror, she grabs for the horse’s mane, but cannot seem to get a firm grip. She tries to throw her arms around the horse’s neck, but she slides down the side of the horse anyway. The horse gallops along, seemingly ignorant of its slipping rider. Finally, giving up her frail grip, the blonde attempts to leap away from the horse and throw herself to safety. Unfortunately, her foot becomes entangled in the stirrup, and she is now at the mercy of the horse’s pounding hooves as her head is struck against the ground over and over. She starts to lose consciousness, but to her great fortune, Bobby, the Wal-Mart greeter, sees her and unplugs the horse.

How do you tell the sex of an ant? Drop it in water… If it sinks... Girl ant If it floats…

555, I went looking too. Unless they are counting the two Green Line extensions past Ha Yaek Lat Phrao and Samrong as separate lines coz they work under a different business model / concession agreement. Note that these stations have island platforms (and there's a depot on each section too) so could have been transfer stations if the concession was not awarded to BTSC.

@GammaGlobulin you and your weather-predicting bones! Ruddy Baltic this morning in Bangkok, 18C! Brrrr.

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