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  1. #26
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    Quote Originally Posted by outdoorbloke View Post
    Yeah I went the square d as well pea told me I have to have an RCB not sure if they will let me have each circuit as an rcbo like I want or if I have to have a main rcbo which I don't really want
    Why would they object to you having an rcbo on each circuit?

    Why don't you want a main residual current breaker?

    Can't you have both?

  2. #27
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    Quote Originally Posted by Slick View Post
    Quote Originally Posted by outdoorbloke
    Yeah I went the square d as well pea told me I have to have an RCB not sure if they will let me have each circuit as an rcbo like I want or if I have to have a main rcbo which I don't really want
    I don't normally recommend ThaiVisa Forum for anything but trolling, but their electrical forum has a mod there named Crossy and he's pretty legit, along with 2-3 other posters in there. For real technical/PEA Specific questions I recommend him in the Electrical Forum. If you create a thread, he will answer. They are pretty helpful up in there. Im pretty sure he made this site too:

    The Thailand Wiring Page

    And it answers most everything as well.
    Yep, Crossy knows his stuff

  3. #28
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    Quote Originally Posted by Slick View Post
    Quote Originally Posted by outdoorbloke
    Ended up going with a 2.2 meter one from the local shop as I didn't have a big enough car to get the 3 meter one home from watsadu.
    lol it should be fine, but after installation, you can do like SandMike says and check the resistance with an Ohm meter/DVOM if you are really concerned about it.

    I had just one regular sized one for the whole house driven by the septic tank and it was just fine. Wired into the consumer unit's earth bar, I used that one earth stake to earth everything and used a single main RCBO.

    Promise you thats gonna be better & safer than 99% of most home installations here.

    I debated driving one for each hot shower and giving them all their own, but decided its overkill & kinda pointless.
    Oh dear.....not quite accurate information here.
    Good luck checking the resistance to earth of an earth stake using a multimeter.

    The earth resistance test is a particular test requiring some very special instrumentation....how far from the earth stake are you pushing the multimeter lead into the ground? 2cm, 20cm. 2m??

    Its a very a regulated and proscribed test carried out at specified intervals, usually for Standards compliance purposes and often on HV/LV substations, very rarely employed on a domestic install.

    I think what you are referring to is the resistance from the earth bar in the CU to the earth stake. That can be checked with a multimeter, although in Oz these days the regulators require an impedance test not a resistance test. 2 ohms is still specified as ok.

    Of course you still need to check the earth stake periodically as copper (wire) can and will corrode.

    Consider installing RCD type devices that will trip out on current imbalance...even if your earth connection has failed. I wont discuss equipotential bonding at this point.

    FYI RCD = Residual Current Device. They work on the principle of current flow out of the device and back in should be close to equal. If it is not then some portion of the current is going somewhere it shouldn't....possibly you.
    20mA is a common standard these days.
    You can get them combined with circuit breaker protection so they provide both people and cable protection. Don't forget to test them....push the test button every 6 months or so to make sure they work.

    Pretty well mandated in Oz for both power and lighting circuits.

    I believe I read something recently indicating something similar is now required by PEA for new installations.

  4. #29
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    Quote Originally Posted by mudcrab
    FYI RCD = Residual Current Device. They work on the principle of current flow out of the device and back in should be close to equal. If it is not then some portion of the current is going somewhere it shouldn't....possibly you.
    20mA is a common standard these days.
    You can get them combined with circuit breaker protection so they provide both people and cable protection. Don't forget to test them....push the test button every 6 months or so to make sure they work.
    This is literally an RCBO and exactly what I said I used. And here its typically adjustable up to 30mA.

    "Residual current Circuit Breaker with Overcurrent protection"

    Before you get spun off again, remember that Im American, You're from Oz, and a lot of this stuff is a type of UK standard, being marginally deployed in Thailand, and a lot of the technical wording can be different, but mean the same thing.

  5. #30
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    I wish I knew what you people are talking about, but I really don't. What should I know about my new house that I clearly do not. As you will appreciate, I am not at all handy or knowledgeable about these things. I just expect to move in and live normally.

  6. #31
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    Quote Originally Posted by lom View Post
    Quote Originally Posted by VocalNeal
    To get below 2m of rubble you can always dig a 300mm or deeper hole then install a rod down to the bottom of the hole. Secure the ground wire and fill in the hole.
    The joint between wire and rod will corrode if down in the ground.
    The joint should always be above ground level so it can be inspected (every 2 year minimum) and should be protected by vulcanizing tape.
    And understand the difference between earthing and equipotential bonding.

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