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  1. ImpededLoop

    Does this need to be bonded?

    Assuming that they are extraneous and that they will be extended with metallic hoops to for the structure of the polytunnel, I would say that they need to be bonded. You've mentioned a lighting installation, so it might be possible to touch a light fitting and a hoop simultaneously? Also, what...
  2. ImpededLoop

    EICR code for hybrid final ring cir

    I wouldn't code it, but would make a note on the EICR about it. You can test the ring continuity and R1R2 from behind one of the sockets if the cables in that connector are too short to easily work with.
  3. ImpededLoop

    Interesting fault? Lowish IR

    Where was the flex neutral?
  4. ImpededLoop

    Interesting fault? Lowish IR

    My guess would be neutral/cpc reversal in the spur feeding the fan, so the fan is connected L/E rather than L/N.
  5. ImpededLoop

    EAL Level 3 NVQ portfolio help?

    It's easy to overthink what is required and once you get going it'll become fairly straightforward. The portfolio is a list of things that you have to achieve (and should be doing anyway). The first statement on Unit 001 is: "I Identified which workplace health and Safety procedures are...
  6. ImpededLoop

    Max Zs Coding Question 80/100%

    Another consideration is that our MFT's are not very accurate under 0.20 ohms. What are the Zdb values that you've measured?
  7. ImpededLoop

    Earthing requirements for a field?

    Part 2 of 7671 page 30. Section 6.1 in GN8 (it's a 17th edition version though...)
  8. ImpededLoop

    Earthing requirements for a field?

    Actually, just read GN8 and parts of the electrical installation aren't considered to be extraneous, so please ignore that paragraph. Everyday's a school day!
  9. ImpededLoop

    Earthing requirements for a field?

    There's several things to consider and the simple answer is to TT the external supplies. Firstly, is any part of the installation in the field likely to be extraneous? Perhaps the chiller will have metal legs onto the soil or the heat mats may have exposed conductive parts in contact with the...
  10. ImpededLoop

    Recommended brand for outside flood light

    Ansell seem to be as good as any of the off the shelf ranges.
  11. ImpededLoop

    Ceiling light rewiring help - unusual old wiring

    Is there a loft space above there as you really need to put those cables into a joint box and then bring a single 3 core cable through for the new light as it's not designed for that type of wiring. The Blacks and blue are all neutrals. The reds are all permanent lives and should be connected...
  12. ImpededLoop

    Different Ze readings

    For TNCS the line-neutral and line-earth Ze values should be identical as the main earth terminal is connected directly to the neutral in the cutout. For a true Ze, disconnect the main earthing conductor and test from the MET terminal on the cutout so that you eliminate any parallel paths...
  13. ImpededLoop

    Main Switch twitch......

    Yes indeed. Type AC are not really suitable now due to electronic loads. Rcbo's are the usual way to go now. What's the application that you're thinking of using an upfront RCD for?
  14. ImpededLoop

    Main Switch twitch......

    Another thing to consider is the DC current from electronic devices which could blind an RCD if several circuits are fed from it.
  15. ImpededLoop

    Main Switch twitch......

    So long as the maximum rated current of the RCD isn't exceeded, then yes.
  16. ImpededLoop

    Threads freezing/adverts

    I'm having trouble using Chrome on my Android phone. Most of the threads seem to freeze as I scroll through them. I end up having to hit "back" and then reopen the thread to be able to continue reading it. I'm think it might be the large number of adverts loading as I scroll downwards.
  17. ImpededLoop

    Main Switch twitch......

    Section 314 is what you need to look at. The quick answer is that it's not normally acceptable to have an RCD as the main switch in most situations with numerous outgoing circuits.
  18. ImpededLoop

    Ecs card application..

    Unfortunately without the NVQ L3 you'll probably get a trainee card or whatever the ungraded card is called. Smaller firms who domestic and small works probably won't require a card so that may be an avenue for you to try.
  19. ImpededLoop

    Current transformer metering producing implausible readings

    I wouldn't put them around the bars myself, but I think they are placed to collect the right consumption for unit ABC.
  20. ImpededLoop

    Current transformer metering producing implausible readings

    There's various CT's available which have various numbers of windings. The meters need to be programmed to the type of CT that's been used. The CT ratio will be on the CT's label. This needs to match the setting in the meter. There's various other parameters that need to be set correctly. If...

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