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  1. ringer

    Changing a CU

    What type of certs would they be then?
  2. ringer

    First Band you saw

    Now that sounds like it was an awesome gig. Mine was 17th October 1978 at the Locarno, Bristol , Siouxsie and the Banshees supported by Nico (who got booed off).
  3. ringer

    Washing machines

    Appendix 15 note (iii). Refers to cookers etc, which obviously a washing m/c is not, but is what the OP thought he had read somewhere.
  4. ringer

    Washing machines

    OP is referring to recommendation in BS7671 about equipment over 2kw being on its own circuit.
  5. ringer

    higher Zs with RCD

    What instrument are you using to measure Zs? What setting is it on? How are you including/excluding the RCD in these tests? And remember, the RCD is there for additional protection rather than for fault protection (unless this is a TT installation).
  6. ringer

    Size Backbox to use

    25mm backboxes should be fine. And yes, the recommendation re depth of chases relates only to channels. You can go deeper for individual points such as socket outlets and light switches.
  7. ringer

    rcd keeps tripping

    What everyone is saying is that it is not an overload, but an accumulation of earth leakage that is causing the rcd to trip. Rcds do not detect overload, that function is done by the individual mcbs on each circuit. To get to the bottom of the problem you need to have tests done with specialised...
  8. ringer

    some advice needed please :)

    Tel, the SFS is for the light, one in each outhouse. 714 (OP), that should be a 3A fuse in the spurs. Sub board for each is way OTT. If water pipe comes from the house (albeit underground) and if the house is properly bonded for services then no need for additional bonding imo, but others may...
  9. ringer

    No earthing

    Why would he get a direct contact shock? Having an earth or not is nothing to do with direct contact.
  10. ringer

    connections in cavity wall

    Is there enough slack for the choc box be pulled out of the wall to access the terminals inside it? If so then it is accessible. Not good practice, but still accessible. Until they get cavity wall insulation, that is - :D
  11. ringer

    R1+R2 Test on outbuilding

    To do the continuity test, the tester is putting 200mA into the circuit, and it is this that trips the RCD. By injecting an exact current (200mA) and measuring the volt drop over the circuit, the resistance is calculated. This, I believe, is the way that low resistance ohmmeters testers work.
  12. ringer

    Wanted, calibration service

    Seconded. Just had him round today to do my PAT tester - previously used him to do my MFT. Very reasonable price, but the convenience of him coming to you is the best bit. Plus he is very knowledgeable about different testers.
  13. ringer

    Prospective Fault Current

    Yes, they have altered the answer, but not the question. The question still does not read right (grammatically/literally), but at least the answer now makes sense.
  14. ringer

    pat testing at a gym

    Please be clear about what test you did, and use the correct terminology. Talking about 'insulation leakage' does not make sense. Also, what tester do you have? Is your machine telling you it is a fail, or are you interpreting the results as a fail?
  15. ringer

    Nikola Tesla You have to watch this

    I guess your theory is correct and it is backed up by articles on the net, but then I am not an expert. I would have thought that building shaded poles would be a costly way of doing it. What about adding some capacitance on the supply circuit of one of the phases to start the motor, then...
  16. ringer

    Nikola Tesla You have to watch this

    The way you hatched the colour in, it looks like the red coils are wound the wrong way.
  17. ringer

    Prospective Fault Current

    I was under the impression that PFC is the greater of either the PEFC or the PSSC. Now look at this article (endorsed by the NIC) on Voltimum.... Voltimum Q&A I am assuming that the guy's tester is indicating over-range on the PSSC measurement. Apart from the fact that the way it is written...
  18. ringer

    Nikola Tesla You have to watch this

    The lower blue coil was wound the wrong way, which you have now corrected. Motor would stall. There is another error. Can you spot it?
  19. ringer

    Timeswitching two immersion heaters

    Not too sure about the quality of those LAP ones - as you say, if they go wrong it will be me having to fix/replace. Plus they are not suitable for adding to conduit - wrong size/shape/fixings to go on surface pattress. Prefer the Timeguard FST17 myself, but concerned customer is going to baulk...
  20. ringer

    Timeswitching two immersion heaters

    Customer will probably want 7 day timer. Has to be surface box-mountable. Can you suggest a make/model? Timeguard FST17 seems to fit the bill but is £50 a pop and will need two of them!

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