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  1. L

    Nuisance tripping - faulty RCD?

    If an rcd is tripping with no load connected then you have an N to E fault somewhere in the installation.
  2. L

    Any seen a RCBO like this before?

    Its not obligatory to use single module but all the big manufacturers are supplying their new DB,s with single module so it's inevitable it will become the new norm. I think many sparks (like me ) mistakenly assumed they were DP. It's a backward step in my view
  3. L

    Any seen a RCBO like this before?

    I have never used any other type of rcbo for the last 25 years except this double pole type.They are a dream to work with. You get D.P. isolation,no fly leads and really easy to install.And guess what??The powers that be have decided to change them for single pole rcbo,s with fly leads?? Give me...
  4. L

    Heavy duty DIY next door possible cause of oven tripping circuit?

    Have not come across this before, but it is possible that the guys working on the other side of the wall have gone a little too deep when either drilling or chasing and damaged your cable in the process
  5. L

    CPC as a functioning return path!!!???

    There is either no rcd on the circuit or its a malfunctioning rcd. The mcb did,nt trip because it was, nt being overloaded. The shower is, nt faulty. Its likely a TNC-S system so the earth wire is in effect acting like an alternative neutral
  6. L

    Power point in external glasshouse

    Completely agree. In the domestic sector "bonding" and "10mm" have become synomimous. Interchangeable. Causing unfortunately a lot of confusion and unnecessary expense in the process. Take this particular post for example. Its revolved around whether the OP should run a 6mm or a 10mm main...
  7. L

    Ring circuits to be retired?

    Honestly, I have never calculated it. I consider the type of installation and tend to use my "gut". But your point about rcbo populated DB, s really is the solution. It really does"future proof" installations against any issues with nuisance tripping
  8. L

    Power point in external glasshouse

    As the OP describes the installation, there are no extraneous parts except for the metal frame. Makes bonding very simple. The metal frame will provide a path to earth but it will likely be relatively high resistance (should be tested and established). A bonding conductor of 4mm from the...
  9. L

    Power point in external glasshouse

    For the illustration you posted supplementary bonding would suffice. The drawings replicates how a kitchen sink was traditionally bonded to the socket where the electric kettle was plugged in
  10. L

    Ring circuits to be retired?

    Firstly, a pretty definitive response from the forum. Secondly I heard the suggestion when watching a "voltimum" webinair on RCD, s. The suggestion was that two radials replacing one ring would double the available leakage. It sounded reasonable to me
  11. L

    Ring circuits to be retired?

    Could the 30% leakage requirement on rcd, s, combined with the inevitable increase in kitchen appliances with intentional leakage built in, force designers to replace rings with radial circuits?
  12. L

    Power point in external glasshouse

    No. Why? MPBC assumes the extraneous part can..... 1) introduce a potential (yes) 2) introduce heat damaging currents. (No) 3) can be simultaneousely touched with other extr. metal (No) Does it require supplementary bonding? Yes Why? A class 1 appliance may be plugged in to the...
  13. L

    Plastic back boxes for lime plaster

    Pvc flush boxes very common. But 16mm size less common as, its too shallow for dimmer . Still used.
  14. L

    Plastic back boxes for lime plaster

    Here is the interesting bit. Just out of curiosity I rang CEF this morning (ROI). He quoted me 1.50 euro for a double box. I then looked up a number of wholesalers in N. I., assuming they would be readily available, but no.Looked up Screwfix. They don, t stock them. I always assumed pvc flush...
  15. L

    Plastic back boxes for lime plaster

    I, m inclined to agree with that assessment. Could see a lot of headaches arising from it.
  16. L

    Plastic back boxes for lime plaster

    Great box. But horrendous price.Can appreciate the reluctance to use plastic
  17. L

    Gas meter with plastic supply pipe - earth bonding worthless?

    Thats a very fitting description of bonding in most sparks experience That guidance document hits the nail right on the head. End of They don, t. Never did. Technically a metal window frame could be an "extraneous part". But it's resistance to earth would likely be so high (this can be...
  18. L

    Plastic back boxes for lime plaster

    The only slight downside with plastic boxes is price. Otherwise its all uphill.
  19. L

    UK Different test results after DB change

    Yes. That's what would normally be done on getting a high reading. And that's what we did on initial testing, but it did, nt bring the readings down. It was only after several weeks of the sockets been in continuous use that that there was an impact on the readings. I, m just speculating that...
  20. L

    Equipotential Bond Current showing on Clamp meter earthing

    That all makes sense then. Your rod could have a resistance of several hundred ohms while your water pipe will have very low resistance.Could be 0.5 ohms or less. Your waterpipe is simply offering an alternative path back to the transformer. In TNC-S systems this is perfectly normal (though a...

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