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JohanB

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Posts posted by JohanB

  1. 36 minutes ago, Crossy said:

     

    Australia, the UK, the US and much of the 220V 3-phase, 4-wire world would disagree.

     

    Of course Thailand (unlike Australia) does allow TT connections so it's entirely up to you.

     

    Please explain under what circumstances properly implemented TNC-S with MEN (PME in the UK) is hazardous?

     

     

    I already explained in my post what a broken neutral coul do.

     

    Here is more from Wiki if you dont belive me!

    ...................

    • ”In single-ended single-phase systems where the Earth and neutral are combined (TN-C, and the part of TN-C-S systems which uses a combined neutral and earth core), if there is a contact problem in the PEN conductor, then all parts of the earthing system beyond the break will rise to the potential of the L conductor. In an unbalanced multi-phase system, the potential of the earthing system will move towards that of the most loaded line conductor. Such a rise in the potential of the neutral beyond the break is known as a neutral inversion.[9] Therefore, TN-C connections must not go across plug/socket connections or flexible cables, where there is a higher probability of contact problems than with fixed wiring. There is also a risk if a cable is damaged, which can be mitigated by the use of concentric cable construction and multiple earth electrodes. Due to the (small) risks of the lost neutral raising 'earthed' metal work to a dangerous potential, coupled with the increased shock risk from proximity to good contact with true earth, the use of TN-C-S supplies is banned in the UK for caravan sites and shore supply to boats, and strongly discouraged for use on farms and outdoor building sites, and in such cases it is recommended to make all outdoor wiring TT with RCD and a separate earth electrode.”

     

    https://en.m.wikipedia.org/wiki/Earthing_system

     

    As most houses in thailand have over head 2 separate wires (not coaxial!) single phase elecric coming in to the fuse box, the neutral wire is very vurnable and exposed to be cut by accident.

     

    Also what I experianced in my country hut some years ago, was after a tree blown down, a faulty repair made where the live and neutral wires were shifted when spliced.

  2. 1 hour ago, Crossy said:

     

    Probably from Forkinhades but it does show the line N-E in the switch box.

     

    A handy PEA document to show your sparks Groundwire Mk2 book-Manual.pdf

     

    And the important page with translations.

     

    Groundwire Mk2 book-Manual-1 diagram.jpg

     

     

    I still very much oppose this half hearted and absolute dangerous MEN connection in Thailand.

    This type of connection is wrong to use, as there is no reliable ground wire comming in to the house!

    The ground rod is normally just inserted in the soil (if you’re lucky) and is not able to carry the current to blow a fuse.

     

    In the scenario that the incoming neutral wire is cut somewhere, all what you belive ”grounded” appliances will carry live 220V on their cabinets, if the ground rod current don’t blow a fuse

     Even the water heater ground in your bathroom will be live.

     

    (Also the neutral and ground is interchanged on the outlet in the drawing)

     

     

     

     

  3. On 3/20/2019 at 9:58 AM, Humpy said:

    One wonders why the need for a 'gizzmo' to right the aircraft at the stall and beyond.= and no means of overriding the system, that is if the system had an override ! Airliners have managed without this 'gizzmo' for many many years. Two highly trained and highly paid pilots up front can monitor speed and angle of climb and take steps to correct as necessary . Audible and 'control column  shake' warnings have been fitted to many aircraft for years in case the pilots were distracted. Keep it simple Boeing .

     

     

    I think you don’t understand the underlaying problem. It’s not a gizmo thing added to a normal balanced a/c.

    This 737 Max with it’s forward mounted bigger/heavier engines is very difficult or almost impossible to take out of a stall and will stall under to high Angel of Attack.

    This is due to the center of gravity change at high AoA. The a/c stalls and gets very nose heavy and can’t easily recover.

     

    At high altitude in thin air, the difference in speed between ’stall’ and ’overspeed’ is very small ( look up ’coffin corner’) and the a/c can stall very quickly at high speed. That’s probably why Boeing made this MCAS system to work in the background, without descibing it in the pilots manual.

     

    Now these accidents in Indonesia and Ethiopia was, what we know, probably caused by one faulty AoA sensor (stuck in high AoA-mode) at low altitude that triggered the MCAS and sent the a/c in a deadly high speed dive...that don’t can be stopped by the normal stick/yoke.

    The other AoA sensor may be working normally and shows the pilot normal values on the screen.

     

    The problem is that just one faulty AoA sensor, without redundancy can trig the MCAS down trim, alarm and stick shaker during normal take off flight, when the flaps were retracted.

     

    The pilots had no idea what was happening and how to turn off the system was not learned or even described in the flight manual.

     

     

  4. Run the aircons continously at a low temperature for some days before leaving, to dry up all furniture, clothes, rugs and bed matrasses etc.

    Then don’t open windows or balcony doors after that.

     When leaving only have ventilation in the bathroom open and close the door to the bathroom, to keep the residual moisture there out from the rest of the apt.

    Vegitable oil and/or plastic covering of the toilet bowl etc. works very good!

     

    We leave our house (bungalow) for 9 months per season and have had some bad smell and moulds problems on the inside of the interior walls before, but after doing the forced ”aircondition dry out” trick we have had no more problems.

    • Like 1
  5. 10 hours ago, neeray said:

    In my 50+ years of driving a million miles or two, I have had the odd tire blow out but never a loss of reasonable control.

    One memorable occasion was when driving a truck on a super highway at 100 kph and a front tire blew out. No great amount of control was lost. I steered the vehicle easily to the service lane.

     

    Yes but you lose control and spin out/roll over if you slam the brakes, which normally thai drivers do when their over/under-inflated front tire explodes.

    I’ve instructed my wife over and over again, never-never to touch the brakes if a tyre goes. Just stear to the road side!

  6. Maybe not about driving skills to turn in a bend.

    On the first photo, the road and markings show no curve, but it looks on the first picture as someone has dug a trench across the road.  The smashed car also has a front wheel in that trench A piece of some pipe is also visible in the trench in front of that car.

    So maybe an illegal road work with no visible warning signs....and the cars tried to avoid driving into it.

     

    Or is it the leaked fluids from the car that gives that impression?

     

  7. 5 hours ago, Pattaya28 said:

    As usual, the important bit of how the password was got, is NOT in the report. 

    They say there was many stolen cards and purchased mercendise found in their home. The thieves must be professionals and have a system to make the cards to stick in the machine.

    Then a hidden micro camera to record the code and go into the bank and claim the cards when they see someone leaving the ATM without claiming a stuck card.

    • Like 1
  8. If you want good coffe you must grind it youself in a mill that don’t heat it up.

     

    We buy delicious espresso coffe beans from Chiang Mai University.

    High Grown (1600m) 100% arabica. Costs around B500/Kg

     

    Highland Research & Training Center

    Faculty of Agriculture

    Chiang Mai University

    Chiang Mai 50200

    Tel 0-5394-4052.  Fax 0-5322-2014

     

    They send by post if you can’t pick it up.

    • Like 1
  9.  

    The chinese are building the Kyauk Pyu Deep Sea Port in the Rakhine State. China is very eager to take control of the economics and also build a nearby industrial park.

    Maybe the chinese don’t want the muslims to make trouble nearby, so probably they ignited/ordered the ethnic cleansing....

     

    https://www.reuters.com/article/china-silkroad-myanmar-port/china-to-take-70-percent-stake-in-strategic-port-in-myanmar-official-idUSL4N1MS3UB

     

    ”China has been pushing for preferential access to the deep sea port of Kyauk Pyu on the Bay of Bengal, an entry point for a Chinese oil and gas pipeline that gives it an alternative route for energy imports from the Middle East that avoids the Malacca Strait, a shipping chokepoint. 

    The port is part of two projects, which also include an industrial park, to develop a special economic zone in Rakhine.”

     

     

  10. 2 hours ago, Roger Lee said:

    Just a wild guess, but the Terminal 21 site has a large plane (think 747) on their drawing of the future shopping mall. Maybe not the same one but I’d bet they have a plane in mind.


    Sent from my iPhone using Thaivisa Connect

     

    They show a model of a  747 with shortened wings. But they would probably chose a more modern type in the end. 

    Would look rediculous with a full size wide body airplane there......

    IMG_0895.thumb.PNG.50657cab830f9c737b41d19462e05632.PNG

  11. Many thanks thedemon for the pictures. What a commitment to deassemble and move that mighty plane. I'm amazed by the sustained quality of the parts and inside decorations and that it looks so good.

     

    It is also almost complete and not crippled as the Korat plane.

     

    Would make an astonishing theme park with a restaurant & night club and  the upper deck VIP lounge. Just flip every second pair of chairs to make 4 seats tables together. Then the "captain/managers office" in the cockpit!

    Great space for stage and tables on the lower deck. Please keep some outer over head storage bins, window panels and some toilets in place for the authentity of the room space.

     Amazing!

     

    Really wish them good luck going further with the project.

     

    This absolutely beats the numerous strange roadside "sheep farms", with an ugly wind mill.....

     

    Johan

     

     

  12. It is not the same 747 discussed in that thread. That was just some 747 piecies from an "Orange Air" one. 

    This is a complete former Thai Air Boeing 747-400, painted in Thai Air colors, being set up in a field on its landing gear, exactly at the position given in the first photo!

    There for anyone to see, just right turn around 3 km down the 322 from the Suk3 / 322 intersection in Bang Sare.

    IMG_0835.thumb.JPG.5fe12b66a82c1031486c63a46ecb6c08.JPG

     

     

     

     

     

  13. imageproxy.php?img=&key=3bccf9db2954ff32How about this one?

    South of Pattaya close to Sukhumwhit Road and 332 intersection.

    Looks like all parts and some extras for the 747......

     

    It is not at any airport, just being assembled on a field close to Sattahip.

    IMG_0838.JPG

    IMG_0839.JPG

    IMG_0842.JPG

  14. On 2017-09-08 at 0:09 AM, Crossy said:

    @JohanB are you saying you have SEEN a water heater with a "real" ELCB fitted (not just labelled ELCB) here in Thailand? How old was it?

     

    All the ones I've looked at (OK not every brand) have had RCD or RCBO (despite being labelled as ELCB) or nothing.

     

    NOTE To those suddenly worried, any modern unit you buy here will be an RCD or RCBO even if labelled "ELCB".

     

    I have been at probably over 70 different guesthoses and cheap hotels/hostels since the mid 1970's and seen a lot of wall instant water heaters.

    Most of them had no test buttons at all and consequently have no built in protection at all.

    I have never disassembled anyone with testbuttons to investigate if there was a voltage or current protection device. If there was a green thin eart wire attached, I assumed it to bee a voltage controlled protection type, as the thin earth wire (if it at all was connected to a ground?) could not blow a 20-40 Amp fuse.

    Most older heaters was only connected with 2 wires and no groundwire. If there was a non functioning test button on one of these, I also assumed a true ELCB type, but not working because of the missing ground wire.

     

    But all these heaters was covered with plastic housing and plastic non conducting knobs. So, as long they were not lose on the wall and threatening to fall down, I didn't conciderate any of them as dangerous, as the plastic shower hose (and the water in it) is not conducting electric current to any extent.

     

    What really make me scared is when I see a metal (type stainless steel) hose on a wall heater or in a bungalow.

    These metal hoses are the killers if the unprotected/faulty heater has a metal threaded tap on the outlet (most modern heaters have plastic threads, but there can be a metal tube insert)

     

    You are not even safe in type twin bungalows, where a couple of bathrooms share an above ceiling electric hot water tank. The built in hot water tubings are often made of galvanized steel and will conduct all the way from the faulty electric H/w tank to a metal shower hose. Even if not carrying high voltage continously, it can kick in when you, or the neightbour, are showering and the thermostat in the tank switches on. This killed a swedish couple, entangeled in a stainless hose, a few years ago.

     

    So if you spot a metal shower hose in any suspect installation, never never never hold it in your hand and around your body when showering. Let it sit in the wall- holder and do not touch it when showering.

     

     

     

     

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