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  1. ringer

    wire a single phase socket from a 3 phase rcd

    Why (unless a fault is occurring) would it trip? The RCD will sum the three incoming lines and compare it to the outgoing neutral. Same principle as a SP RCD really. There are people on this thread who are saying that unless a 3PH system is balanced then the RCD will trip. How many of you have...
  2. ringer

    basic bad practice

    I disagree with what you say. I believe that they are referring to sites which run 24/7 and cannot be switched off entirely. They are not proposing to measure Ze, but Zs. Measuring Zs will , assuming acceptable results, confirm adequate earthing for protective devices to operate. They mention...
  3. ringer

    Help with megger 1553 fault

    @hoppy Did you try this at any other properties, like your own house? What is the state of the batteries in your tester? Did you try it on 'High'? I have found (on my 1552) that sometimes the No Trip setting constantly stops at 'trp' but then the high current option works without tripping the...
  4. ringer

    seperation

    515.2 Prevention of Mutual Detrimental Influence 528.1 Proximity or wiring systems to other services
  5. ringer

    spark V'S plumbers.........

    Don't the drains run UPHILL in the southern hemisphere? :D
  6. ringer

    Which earthing system is this, TN-S or TN-CS?

    Came across this today. Initially thought it was TN-S then spotted the PME sticker and notice. If the green/yellow earthing conductor coming from the supply head to the MET is joined to the neutral inside the head, why have they left the original braid from the incoming sheath still attached to...
  7. IMAG0460.jpg

    IMAG0460.jpg

    • ringer
    • Media item
    • Comments: 0
    • Category: Professional Electrician
  8. ringer

    TN-CS or TNS?

    It's too late to cancel the assessment so you might as well go through with it. But do not be surprised if the assessor fails you. If you are really lucky he may ask you to put right certain things and provide proof it has been done. Either way you can expect a lot of questions from the...
  9. ringer

    Re connecting up customers immersion heater

    This is the common sense approach, from those that use their heads, rather than taking everything stated in BS7671 as gospel.
  10. ringer

    Re connecting up customers immersion heater

    I'm sure what you really meant to say was p425, 433.1.103 :wink_smile: (BGB);)
  11. ringer

    IEE Guidance Note 3 New Edition?

    Latest info on the IET website suggests April 2012 is the publishing date Guidance Note 3: Inspection and Testing, 6th Edition - IET Electrical
  12. ringer

    interesting fault

    Any ideas what caused the split/damage to the cable?
  13. ringer

    airing cupboard temp

    What's that in modern currency then, Tel?
  14. ringer

    so who got what at the elex show....

    You mean one (or three - lol) of these...?
  15. ringer

    so who got what at the elex show....

    What sort of breakout box was this? And who was offering them?
  16. ringer

    Junctions in main bonding?

    Scrap prices are quite high at the moment. It might not end up costing you quite as much as you thought. :D
  17. ringer

    best books/reference guides for learning heating control wiring and fault finding.

    Re: best books/reference guides for learning heating control wiring and fault finding Get yourself on a Honeywell course. They are free (apart from you need time off work that day) and very informative. Check out their website. There is more than one post on this site giving opinions and info...
  18. ringer

    Help with combination microwave

    What is your location? If one of our members is nearby they might just be able to pop round and tell you what's what, if you're lucky.
  19. ringer

    Ze and distance from substation

    Took a while to get an answer to my original question, so thank you E54 for your last post! I was hoping someone was going to say that. I hope to get the opportunity to take my own measurements sometime soon - I hate it when I suspect something is wrong, and cannot rest until i get to the...
  20. ringer

    Ze and distance from substation

    And it seems the Memera 2000 HRC fuse carriers have been discontinued, and they were only rated for fuses up to 16kA PFC. HRC fuse carrier at RS

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