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  1. S

    leakage clamp meter accuracy

    Sorry my bad wording. What I meant to say was rcd didn’t trip when I was monitoring high levels of leakage current on the clamp meter. The Test button definitely tripped the RCD:) Also every circuit passes through RCD so a N-E would trip RCD I think? I had another go and it seems the problem...
  2. S

    leakage clamp meter accuracy

    Thx Yes I agree about testing before replacing cu. At the moment I’m not suspecting the rcd as it does trip sporadically ( last two times coinciding with grill turning on) so I’m guessing cumulative leakage given everything is on one rcd. It was only the fact that I thought I’d do a quick check...
  3. S

    leakage clamp meter accuracy

    thx yes I just re-checked I must have looked at that when I bought it in feb 2021 as I remembered the manual:) it says ×- 5% with 100microamps resolution on 20ma setting. I just saw a review on YouTube which shows same symptoms as me:( I guess I can't send it back after 2 years aggggggh at...
  4. S

    leakage clamp meter accuracy

    hello. I'm using leakage clamp meter to investigate nuisance tripping in my house. It is a MULTICOMP PRO MP780050 that I bought early 2021. However, once I bought it the nuisance tripping stopped, so I put it down to damp in garage at the time. This looks just like the Dilog6518 (just without...
  5. S

    leakage clamp meter accuracy

    hello. I'm using leakage clamp meter to investigate nuisance tripping in my house. It is a MULTICOMP PRO MP780050 that I bought early 2021. However, once I bought it the nuisance tripping stopped, so I put it down to damp in garage at the time. This looks just like the Dilog6518 (just without...
  6. S

    Bond sinks and mains water with plastic at start

    I would like to test for interest more than anything as I have a 1986 house with copper pipe throughout but with some plastic additions that I have made over the years. However all CH pipes are connected to bonded gas main pipe via boiler and copper hot water tank. Assuming the flexible hoses (...
  7. S

    Bond sinks and mains water with plastic at start

    I certainly hope so. Although I only started looking at this as I’m just about to refurb bathroom and also want to change CU. Once I’ve done those I guess my involvement in electrical work will cease. As it turns out I cannot legally do the latter in a cost effective manner, so will either have...
  8. S

    Bond sinks and mains water with plastic at start

    Thanks?. I’m only trying to understand it so probs am overthinking it. However, if you take a look around at the many forums where the topic has been discussed you will see that it may not be as clear to many people as it is to you
  9. S

    Bond sinks and mains water with plastic at start

    Reading about this for a while now. Still none the wiser about whether bonding is required in bathroom or when. At least I know kitchens and water mains with plastic at point of Ingres don’t need it (I’m going to leave it in for now though. Read on one forum that there was a Poor unfortunate...
  10. S

    Bond sinks and mains water with plastic at start

    Thanks for that it is one I had seen . It says at 2.00 that any less than 1667ohms no bonding required (assuming rcd 30ma). At the end it says less than .02MOhms you do need to bond and above you don’t? Both say measure Between Known earth in the room and lump of metal you want to know whether...
  11. S

    Bond sinks and mains water with plastic at start

    this is where i get really confused. im going to get somwone to do the job anyway but for my own sanity is there an explicit definition of "extraneous metal part"? i thought it was a conductive "thing" that enters the location (house) which may introduce a separate connection to earth and...
  12. S

    Bond sinks and mains water with plastic at start

    I thought the regulation states kitchen sinks don’t require bonding? would a test be useful because things may well change in future especially with introduction of plastic pipe into copper pipe systems.
  13. S

    Bond sinks and mains water with plastic at start

    ? I used to it all my own electrical work given I was a time served sparky once upon a time (mainly industrial though). I need to change cu now to increase number of RCD, I only have one at the moment, maybe add RCBOs and add a new circuit to shed. I was thinking of buying MFT but at £500 for a...
  14. S

    Bond sinks and mains water with plastic at start

    Good point. Damned if we do damned if we do the then! I guess my question is which is the more likely fault condition..an earth fault on main installation which raises its potential and that of any bonded metalwork OR a fault within the installation (e.g. pipe touched by cable) which raises...
  15. S

    Bond sinks and mains water with plastic at start

    thx all. i understand there is no longer a requirement to bond kitchen sink or water pipe if plastic entering building. but if this metal is not now extraneous (outside building) AND not exposed conductive part of part of electrical installation iit can sit there unbonded and become live in...
  16. S

    RCD tripping overnight with nothing connected

    Have you actually disconnected the loads from the Mcbs or just switched them off? Maybe you have a multiple issue e.g fault dodgy mcb letting current through to trip rcd with another fault like an earth fault or shared neutral which would explain why disconnecting neutrals hasn’t stopped issue...
  17. S

    Bond sinks and mains water with plastic at start

    Hi sorry very long one. Please hop to bottom paragraph for short version. I’m just about to refurb bathroom in my 1986 house but bonding always confused me and I am still confused now! So my main incoming water pipe (extraneous) is Currently bonded To MET in 10mm and hot and cold pipes cross...
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